J. Bruce Fields
84ba6b78ba
sunrpc: handle ENOMEM in rpcb_getport_async
...
commit 81c88b18de1f11f70c97f28ced8d642c00bb3955 upstream.
If we ignore the error we'll hit a null dereference a little later.
Reported-by: syzbot+4b98281f2401ab849f4b@syzkaller.appspotmail.com
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:51 +01:00
Hans Verkuil
f76e38ea42
media: vb2: vb2_mmap: move lock up
...
commit cd26d1c4d1bc947b56ae404998ae2276df7b39b7 upstream.
If a filehandle is dup()ped, then it is possible to close it from one fd
and call mmap from the other. This creates a race condition in vb2_mmap
where it is using queue data that __vb2_queue_free (called from close())
is in the process of releasing.
By moving up the mutex_lock(mmap_lock) in vb2_mmap this race is avoided
since __vb2_queue_free is called with the same mutex locked. So vb2_mmap
now reads consistent buffer data.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Reported-by: syzbot+be93025dd45dccd8923c@syzkaller.appspotmail.com
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:51 +01:00
James Morris
ac0e225395
LSM: Check for NULL cred-security on free
...
commit a5795fd38ee8194451ba3f281f075301a3696ce2 upstream.
From: Casey Schaufler <casey@schaufler-ca.com>
Check that the cred security blob has been set before trying
to clean it up. There is a case during credential initialization
that could result in this.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Acked-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: James Morris <james.morris@microsoft.com>
Reported-by: syzbot+69ca07954461f189e808@syzkaller.appspotmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Hans Verkuil
4bc86212e1
media: vivid: set min width/height to a value > 0
...
commit 9729d6d282a6d7ce88e64c9119cecdf79edf4e88 upstream.
The capture DV timings capabilities allowed for a minimum width and
height of 0. So passing a timings struct with 0 values is allowed
and will later cause a division by zero.
Ensure that the width and height must be >= 16 to avoid this.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+57c3d83d71187054d56f@syzkaller.appspotmail.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Hans Verkuil
8185cc4ff8
media: vivid: fix error handling of kthread_run
...
commit 701f49bc028edb19ffccd101997dd84f0d71e279 upstream.
kthread_run returns an error pointer, but elsewhere in the code
dev->kthread_vid_cap/out is checked against NULL.
If kthread_run returns an error, then set the pointer to NULL.
I chose this method over changing all kthread_vid_cap/out tests
elsewhere since this is more robust.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Reported-by: syzbot+53d5b2df0d9744411e2e@syzkaller.appspotmail.com
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Vlad Tsyrklevich
505c2ac72a
omap2fb: Fix stack memory disclosure
...
commit a01421e4484327fe44f8e126793ed5a48a221e24 upstream.
Using [1] for static analysis I found that the OMAPFB_QUERY_PLANE,
OMAPFB_GET_COLOR_KEY, OMAPFB_GET_DISPLAY_INFO, and OMAPFB_GET_VRAM_INFO
cases could all leak uninitialized stack memory--either due to
uninitialized padding or 'reserved' fields.
Fix them by clearing the shared union used to store copied out data.
[1] https://github.com/vlad902/kernel-uninitialized-memory-checker
Signed-off-by: Vlad Tsyrklevich <vlad@tsyrklevich.net>
Reviewed-by: Kees Cook <keescook@chromium.org>
Fixes: b39a982ddecf ("OMAP: DSS2: omapfb driver")
Cc: security@kernel.org
[b.zolnierkie: prefix patch subject with "omap2fb: "]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
YunQiang Su
93e6b2659b
Disable MSI also when pcie-octeon.pcie_disable on
...
commit a214720cbf50cd8c3f76bbb9c3f5c283910e9d33 upstream.
Octeon has an boot-time option to disable pcie.
Since MSI depends on PCI-E, we should also disable MSI also with
this option is on in order to avoid inadvertently accessing PCIe
registers.
Signed-off-by: YunQiang Su <ysu@wavecomp.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: pburton@wavecomp.com
Cc: linux-mips@vger.kernel.org
Cc: aaro.koskinen@iki.fi
Cc: stable@vger.kernel.org # v3.3+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Jonathan Hunter
af135bd839
mfd: tps6586x: Handle interrupts on suspend
...
commit ac4ca4b9f4623ba5e1ea7a582f286567c611e027 upstream.
The tps6586x driver creates an irqchip that is used by its various child
devices for managing interrupts. The tps6586x-rtc device is one of its
children that uses the tps6586x irqchip. When using the tps6586x-rtc as
a wake-up device from suspend, the following is seen:
PM: Syncing filesystems ... done.
Freezing user space processes ... (elapsed 0.001 seconds) done.
OOM killer disabled.
Freezing remaining freezable tasks ... (elapsed 0.000 seconds) done.
Disabling non-boot CPUs ...
Entering suspend state LP1
Enabling non-boot CPUs ...
CPU1 is up
tps6586x 3-0034: failed to read interrupt status
tps6586x 3-0034: failed to read interrupt status
The reason why the tps6586x interrupt status cannot be read is because
the tps6586x interrupt is not masked during suspend and when the
tps6586x-rtc interrupt occurs, to wake-up the device, the interrupt is
seen before the i2c controller has been resumed in order to read the
tps6586x interrupt status.
The tps6586x-rtc driver sets it's interrupt as a wake-up source during
suspend, which gets propagated to the parent tps6586x interrupt.
However, the tps6586x-rtc driver cannot disable it's interrupt during
suspend otherwise we would never be woken up and so the tps6586x must
disable it's interrupt instead.
Prevent the tps6586x interrupt handler from executing on exiting suspend
before the i2c controller has been resumed by disabling the tps6586x
interrupt on entering suspend and re-enabling it on resuming from
suspend.
Cc: stable@vger.kernel.org
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Arnd Bergmann
db58a20379
mips: fix n32 compat_ipc_parse_version
...
commit 5a9372f751b5350e0ce3d2ee91832f1feae2c2e5 upstream.
While reading through the sysvipc implementation, I noticed that the n32
semctl/shmctl/msgctl system calls behave differently based on whether
o32 support is enabled or not: Without o32, the IPC_64 flag passed by
user space is rejected but calls without that flag get IPC_64 behavior.
As far as I can tell, this was inadvertently changed by a cleanup patch
but never noticed by anyone, possibly nobody has tried using sysvipc
on n32 after linux-3.19.
Change it back to the old behavior now.
Fixes: 78aaf956ba3a ("MIPS: Compat: Fix build error if CONFIG_MIPS32_COMPAT but no compat ABI.")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: stable@vger.kernel.org # 3.19+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Ivan Mironov
2f8018df3f
scsi: sd: Fix cache_type_store()
...
commit 44759979a49bfd2d20d789add7fa81a21eb1a4ab upstream.
Changing of caching mode via /sys/devices/.../scsi_disk/.../cache_type may
fail if device responds to MODE SENSE command with DPOFUA flag set, and
then checks this flag to be not set on MODE SELECT command.
In this scenario, when trying to change cache_type, write always fails:
# echo "none" >cache_type
bash: echo: write error: Invalid argument
And following appears in dmesg:
[13007.865745] sd 1:0:1:0: [sda] Sense Key : Illegal Request [current]
[13007.865753] sd 1:0:1:0: [sda] Add. Sense: Invalid field in parameter list
From SBC-4 r15, 6.5.1 "Mode pages overview", description of DEVICE-SPECIFIC
PARAMETER field in the mode parameter header:
...
The write protect (WP) bit for mode data sent with a MODE SELECT
command shall be ignored by the device server.
...
The DPOFUA bit is reserved for mode data sent with a MODE SELECT
command.
...
The remaining bits in the DEVICE-SPECIFIC PARAMETER byte are also reserved
and shall be set to zero.
[mkp: shuffled commentary to commit description]
Cc: stable@vger.kernel.org
Signed-off-by: Ivan Mironov <mironov.ivan@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Kees Cook
e08323f75b
Yama: Check for pid death before checking ancestry
...
commit 9474f4e7cd71a633fa1ef93b7daefd44bbdfd482 upstream.
It's possible that a pid has died before we take the rcu lock, in which
case we can't walk the ancestry list as it may be detached. Instead, check
for death first before doing the walk.
Reported-by: syzbot+a9ac39bf55329e206219@syzkaller.appspotmail.com
Fixes: 2d514487faf1 ("security: Yama LSM")
Cc: stable@vger.kernel.org
Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <james.morris@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Josef Bacik
bc42c4f338
btrfs: wait on ordered extents on abort cleanup
...
commit 74d5d229b1bf60f93bff244b2dfc0eb21ec32a07 upstream.
If we flip read-only before we initiate writeback on all dirty pages for
ordered extents we've created then we'll have ordered extents left over
on umount, which results in all sorts of bad things happening. Fix this
by making sure we wait on ordered extents if we have to do the aborted
transaction cleanup stuff.
generic/475 can produce this warning:
[ 8531.177332] WARNING: CPU: 2 PID: 11997 at fs/btrfs/disk-io.c:3856 btrfs_free_fs_root+0x95/0xa0 [btrfs]
[ 8531.183282] CPU: 2 PID: 11997 Comm: umount Tainted: G W 5.0.0-rc1-default+ #394
[ 8531.185164] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),BIOS rel-1.11.2-0-gf9626cc-prebuilt.qemu-project.org 04/01/2014
[ 8531.187851] RIP: 0010:btrfs_free_fs_root+0x95/0xa0 [btrfs]
[ 8531.193082] RSP: 0018:ffffb1ab86163d98 EFLAGS: 00010286
[ 8531.194198] RAX: ffff9f3449494d18 RBX: ffff9f34a2695000 RCX:0000000000000000
[ 8531.195629] RDX: 0000000000000002 RSI: 0000000000000001 RDI:0000000000000000
[ 8531.197315] RBP: ffff9f344e930000 R08: 0000000000000001 R09:0000000000000000
[ 8531.199095] R10: 0000000000000000 R11: ffff9f34494d4ff8 R12:ffffb1ab86163dc0
[ 8531.200870] R13: ffff9f344e9300b0 R14: ffffb1ab86163db8 R15:0000000000000000
[ 8531.202707] FS: 00007fc68e949fc0(0000) GS:ffff9f34bd800000(0000)knlGS:0000000000000000
[ 8531.204851] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 8531.205942] CR2: 00007ffde8114dd8 CR3: 000000002dfbd000 CR4:00000000000006e0
[ 8531.207516] Call Trace:
[ 8531.208175] btrfs_free_fs_roots+0xdb/0x170 [btrfs]
[ 8531.210209] ? wait_for_completion+0x5b/0x190
[ 8531.211303] close_ctree+0x157/0x350 [btrfs]
[ 8531.212412] generic_shutdown_super+0x64/0x100
[ 8531.213485] kill_anon_super+0x14/0x30
[ 8531.214430] btrfs_kill_super+0x12/0xa0 [btrfs]
[ 8531.215539] deactivate_locked_super+0x29/0x60
[ 8531.216633] cleanup_mnt+0x3b/0x70
[ 8531.217497] task_work_run+0x98/0xc0
[ 8531.218397] exit_to_usermode_loop+0x83/0x90
[ 8531.219324] do_syscall_64+0x15b/0x180
[ 8531.220192] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 8531.221286] RIP: 0033:0x7fc68e5e4d07
[ 8531.225621] RSP: 002b:00007ffde8116608 EFLAGS: 00000246 ORIG_RAX:00000000000000a6
[ 8531.227512] RAX: 0000000000000000 RBX: 00005580c2175970 RCX:00007fc68e5e4d07
[ 8531.229098] RDX: 0000000000000001 RSI: 0000000000000000 RDI:00005580c2175b80
[ 8531.230730] RBP: 0000000000000000 R08: 00005580c2175ba0 R09:00007ffde8114e80
[ 8531.232269] R10: 0000000000000000 R11: 0000000000000246 R12:00005580c2175b80
[ 8531.233839] R13: 00007fc68eac61c4 R14: 00005580c2175a68 R15:0000000000000000
Leaving a tree in the rb-tree:
3853 void btrfs_free_fs_root(struct btrfs_root *root)
3854 {
3855 iput(root->ino_cache_inode);
3856 WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree));
CC: stable@vger.kernel.org
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
[ add stacktrace ]
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Eric Biggers
461652efc1
crypto: authenc - fix parsing key with misaligned rta_len
...
commit 8f9c469348487844328e162db57112f7d347c49f upstream.
Keys for "authenc" AEADs are formatted as an rtattr containing a 4-byte
'enckeylen', followed by an authentication key and an encryption key.
crypto_authenc_extractkeys() parses the key to find the inner keys.
However, it fails to consider the case where the rtattr's payload is
longer than 4 bytes but not 4-byte aligned, and where the key ends
before the next 4-byte aligned boundary. In this case, 'keylen -=
RTA_ALIGN(rta->rta_len);' underflows to a value near UINT_MAX. This
causes a buffer overread and crash during crypto_ahash_setkey().
Fix it by restricting the rtattr payload to the expected size.
Reproducer using AF_ALG:
#include <linux/if_alg.h>
#include <linux/rtnetlink.h>
#include <sys/socket.h>
int main()
{
int fd;
struct sockaddr_alg addr = {
.salg_type = "aead",
.salg_name = "authenc(hmac(sha256),cbc(aes))",
};
struct {
struct rtattr attr;
__be32 enckeylen;
char keys[1];
} __attribute__((packed)) key = {
.attr.rta_len = sizeof(key),
.attr.rta_type = 1 /* CRYPTO_AUTHENC_KEYA_PARAM */,
};
fd = socket(AF_ALG, SOCK_SEQPACKET, 0);
bind(fd, (void *)&addr, sizeof(addr));
setsockopt(fd, SOL_ALG, ALG_SET_KEY, &key, sizeof(key));
}
It caused:
BUG: unable to handle kernel paging request at ffff88007ffdc000
PGD 2e01067 P4D 2e01067 PUD 2e04067 PMD 2e05067 PTE 0
Oops: 0000 [#1 ] SMP
CPU: 0 PID: 883 Comm: authenc Not tainted 4.20.0-rc1-00108-g00c9fe37a7f27 #13
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-20181126_142135-anatol 04/01/2014
RIP: 0010:sha256_ni_transform+0xb3/0x330 arch/x86/crypto/sha256_ni_asm.S:155
[...]
Call Trace:
sha256_ni_finup+0x10/0x20 arch/x86/crypto/sha256_ssse3_glue.c:321
crypto_shash_finup+0x1a/0x30 crypto/shash.c:178
shash_digest_unaligned+0x45/0x60 crypto/shash.c:186
crypto_shash_digest+0x24/0x40 crypto/shash.c:202
hmac_setkey+0x135/0x1e0 crypto/hmac.c:66
crypto_shash_setkey+0x2b/0xb0 crypto/shash.c:66
shash_async_setkey+0x10/0x20 crypto/shash.c:223
crypto_ahash_setkey+0x2d/0xa0 crypto/ahash.c:202
crypto_authenc_setkey+0x68/0x100 crypto/authenc.c:96
crypto_aead_setkey+0x2a/0xc0 crypto/aead.c:62
aead_setkey+0xc/0x10 crypto/algif_aead.c:526
alg_setkey crypto/af_alg.c:223 [inline]
alg_setsockopt+0xfe/0x130 crypto/af_alg.c:256
__sys_setsockopt+0x6d/0xd0 net/socket.c:1902
__do_sys_setsockopt net/socket.c:1913 [inline]
__se_sys_setsockopt net/socket.c:1910 [inline]
__x64_sys_setsockopt+0x1f/0x30 net/socket.c:1910
do_syscall_64+0x4a/0x180 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Fixes: e236d4a89a2f ("[CRYPTO] authenc: Move enckeylen into key itself")
Cc: <stable@vger.kernel.org> # v2.6.25+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:50 +01:00
Harsh Jain
ca3f892b57
crypto: authencesn - Avoid twice completion call in decrypt path
...
commit a7773363624b034ab198c738661253d20a8055c2 upstream.
Authencesn template in decrypt path unconditionally calls aead_request_complete
after ahash_verify which leads to following kernel panic in after decryption.
[ 338.539800] BUG: unable to handle kernel NULL pointer dereference at 0000000000000004
[ 338.548372] PGD 0 P4D 0
[ 338.551157] Oops: 0000 [#1 ] SMP PTI
[ 338.554919] CPU: 0 PID: 0 Comm: swapper/0 Kdump: loaded Tainted: G W I 4.19.7+ #13
[ 338.564431] Hardware name: Supermicro X8ST3/X8ST3, BIOS 2.0 07/29/10
[ 338.572212] RIP: 0010:esp_input_done2+0x350/0x410 [esp4]
[ 338.578030] Code: ff 0f b6 68 10 48 8b 83 c8 00 00 00 e9 8e fe ff ff 8b 04 25 04 00 00 00 83 e8 01 48 98 48 8b 3c c5 10 00 00 00 e9 f7 fd ff ff <8b> 04 25 04 00 00 00 83 e8 01 48 98 4c 8b 24 c5 10 00 00 00 e9 3b
[ 338.598547] RSP: 0018:ffff911c97803c00 EFLAGS: 00010246
[ 338.604268] RAX: 0000000000000002 RBX: ffff911c4469ee00 RCX: 0000000000000000
[ 338.612090] RDX: 0000000000000000 RSI: 0000000000000130 RDI: ffff911b87c20400
[ 338.619874] RBP: 0000000000000000 R08: ffff911b87c20498 R09: 000000000000000a
[ 338.627610] R10: 0000000000000001 R11: 0000000000000004 R12: 0000000000000000
[ 338.635402] R13: ffff911c89590000 R14: ffff911c91730000 R15: 0000000000000000
[ 338.643234] FS: 0000000000000000(0000) GS:ffff911c97800000(0000) knlGS:0000000000000000
[ 338.652047] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 338.658299] CR2: 0000000000000004 CR3: 00000001ec20a000 CR4: 00000000000006f0
[ 338.666382] Call Trace:
[ 338.669051] <IRQ>
[ 338.671254] esp_input_done+0x12/0x20 [esp4]
[ 338.675922] chcr_handle_resp+0x3b5/0x790 [chcr]
[ 338.680949] cpl_fw6_pld_handler+0x37/0x60 [chcr]
[ 338.686080] chcr_uld_rx_handler+0x22/0x50 [chcr]
[ 338.691233] uldrx_handler+0x8c/0xc0 [cxgb4]
[ 338.695923] process_responses+0x2f0/0x5d0 [cxgb4]
[ 338.701177] ? bitmap_find_next_zero_area_off+0x3a/0x90
[ 338.706882] ? matrix_alloc_area.constprop.7+0x60/0x90
[ 338.712517] ? apic_update_irq_cfg+0x82/0xf0
[ 338.717177] napi_rx_handler+0x14/0xe0 [cxgb4]
[ 338.722015] net_rx_action+0x2aa/0x3e0
[ 338.726136] __do_softirq+0xcb/0x280
[ 338.730054] irq_exit+0xde/0xf0
[ 338.733504] do_IRQ+0x54/0xd0
[ 338.736745] common_interrupt+0xf/0xf
Fixes: 104880a6b470 ("crypto: authencesn - Convert to new AEAD...")
Signed-off-by: Harsh Jain <harsh@chelsio.com>
Cc: stable@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:49 +01:00
Willem de Bruijn
471a110cd2
ip: on queued skb use skb_header_pointer instead of pskb_may_pull
...
[ Upstream commit 4a06fa67c4da20148803525151845276cdb995c1 ]
Commit 2efd4fca703a ("ip: in cmsg IP(V6)_ORIGDSTADDR call
pskb_may_pull") avoided a read beyond the end of the skb linear
segment by calling pskb_may_pull.
That function can trigger a BUG_ON in pskb_expand_head if the skb is
shared, which it is when when peeking. It can also return ENOMEM.
Avoid both by switching to safer skb_header_pointer.
Fixes: 2efd4fca703a ("ip: in cmsg IP(V6)_ORIGDSTADDR call pskb_may_pull")
Reported-by: syzbot <syzkaller@googlegroups.com>
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:49 +01:00
Jason Gunthorpe
b57db51007
packet: Do not leak dev refcounts on error exit
...
[ Upstream commit d972f3dce8d161e2142da0ab1ef25df00e2f21a9 ]
'dev' is non NULL when the addr_len check triggers so it must goto a label
that does the dev_put otherwise dev will have a leaked refcount.
This bug causes the ib_ipoib module to become unloadable when using
systemd-network as it triggers this check on InfiniBand links.
Fixes: 99137b7888f4 ("packet: validate address length")
Reported-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:49 +01:00
JianJhen Chen
01267fc7a7
net: bridge: fix a bug on using a neighbour cache entry without checking its state
...
[ Upstream commit 4c84edc11b76590859b1e45dd676074c59602dc4 ]
When handling DNAT'ed packets on a bridge device, the neighbour cache entry
from lookup was used without checking its state. It means that a cache entry
in the NUD_STALE state will be used directly instead of entering the NUD_DELAY
state to confirm the reachability of the neighbor.
This problem becomes worse after commit 2724680bceee ("neigh: Keep neighbour
cache entries if number of them is small enough."), since all neighbour cache
entries in the NUD_STALE state will be kept in the neighbour table as long as
the number of cache entries does not exceed the value specified in gc_thresh1.
This commit validates the state of a neighbour cache entry before using
the entry.
Signed-off-by: JianJhen Chen <kchen@synology.com>
Reviewed-by: JinLin Chen <jlchen@synology.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:49 +01:00
Eric Dumazet
876d68105d
ipv6: fix kernel-infoleak in ipv6_local_error()
...
[ Upstream commit 7d033c9f6a7fd3821af75620a0257db87c2b552a ]
This patch makes sure the flow label in the IPv6 header
forged in ipv6_local_error() is initialized.
BUG: KMSAN: kernel-infoleak in _copy_to_user+0x16b/0x1f0 lib/usercopy.c:32
CPU: 1 PID: 24675 Comm: syz-executor1 Not tainted 4.20.0-rc7+ #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x173/0x1d0 lib/dump_stack.c:113
kmsan_report+0x12e/0x2a0 mm/kmsan/kmsan.c:613
kmsan_internal_check_memory+0x455/0xb00 mm/kmsan/kmsan.c:675
kmsan_copy_to_user+0xab/0xc0 mm/kmsan/kmsan_hooks.c:601
_copy_to_user+0x16b/0x1f0 lib/usercopy.c:32
copy_to_user include/linux/uaccess.h:177 [inline]
move_addr_to_user+0x2e9/0x4f0 net/socket.c:227
___sys_recvmsg+0x5d7/0x1140 net/socket.c:2284
__sys_recvmsg net/socket.c:2327 [inline]
__do_sys_recvmsg net/socket.c:2337 [inline]
__se_sys_recvmsg+0x2fa/0x450 net/socket.c:2334
__x64_sys_recvmsg+0x4a/0x70 net/socket.c:2334
do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457ec9
Code: 6d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8750c06c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9
RDX: 0000000000002000 RSI: 0000000020000400 RDI: 0000000000000005
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8750c076d4
R13: 00000000004c4a60 R14: 00000000004d8140 R15: 00000000ffffffff
Uninit was stored to memory at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline]
kmsan_save_stack mm/kmsan/kmsan.c:219 [inline]
kmsan_internal_chain_origin+0x134/0x230 mm/kmsan/kmsan.c:439
__msan_chain_origin+0x70/0xe0 mm/kmsan/kmsan_instr.c:200
ipv6_recv_error+0x1e3f/0x1eb0 net/ipv6/datagram.c:475
udpv6_recvmsg+0x398/0x2ab0 net/ipv6/udp.c:335
inet_recvmsg+0x4fb/0x600 net/ipv4/af_inet.c:830
sock_recvmsg_nosec net/socket.c:794 [inline]
sock_recvmsg+0x1d1/0x230 net/socket.c:801
___sys_recvmsg+0x4d5/0x1140 net/socket.c:2278
__sys_recvmsg net/socket.c:2327 [inline]
__do_sys_recvmsg net/socket.c:2337 [inline]
__se_sys_recvmsg+0x2fa/0x450 net/socket.c:2334
__x64_sys_recvmsg+0x4a/0x70 net/socket.c:2334
do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:204 [inline]
kmsan_internal_poison_shadow+0x92/0x150 mm/kmsan/kmsan.c:158
kmsan_kmalloc+0xa6/0x130 mm/kmsan/kmsan_hooks.c:176
kmsan_slab_alloc+0xe/0x10 mm/kmsan/kmsan_hooks.c:185
slab_post_alloc_hook mm/slab.h:446 [inline]
slab_alloc_node mm/slub.c:2759 [inline]
__kmalloc_node_track_caller+0xe18/0x1030 mm/slub.c:4383
__kmalloc_reserve net/core/skbuff.c:137 [inline]
__alloc_skb+0x309/0xa20 net/core/skbuff.c:205
alloc_skb include/linux/skbuff.h:998 [inline]
ipv6_local_error+0x1a7/0x9e0 net/ipv6/datagram.c:334
__ip6_append_data+0x129f/0x4fd0 net/ipv6/ip6_output.c:1311
ip6_make_skb+0x6cc/0xcf0 net/ipv6/ip6_output.c:1775
udpv6_sendmsg+0x3f8e/0x45d0 net/ipv6/udp.c:1384
inet_sendmsg+0x54a/0x720 net/ipv4/af_inet.c:798
sock_sendmsg_nosec net/socket.c:621 [inline]
sock_sendmsg net/socket.c:631 [inline]
__sys_sendto+0x8c4/0xac0 net/socket.c:1788
__do_sys_sendto net/socket.c:1800 [inline]
__se_sys_sendto+0x107/0x130 net/socket.c:1796
__x64_sys_sendto+0x6e/0x90 net/socket.c:1796
do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
Bytes 4-7 of 28 are uninitialized
Memory access of size 28 starts at ffff8881937bfce0
Data copied to user address 0000000020000000
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:49 +01:00
Mark Rutland
5b1d8e5d86
arm64: Don't trap host pointer auth use to EL2
...
[ Backport of upstream commit b3669b1e1c09890d61109a1a8ece2c5b66804714 ]
To allow EL0 (and/or EL1) to use pointer authentication functionality,
we must ensure that pointer authentication instructions and accesses to
pointer authentication keys are not trapped to EL2.
This patch ensures that HCR_EL2 is configured appropriately when the
kernel is booted at EL2. For non-VHE kernels we set HCR_EL2.{API,APK},
ensuring that EL1 can access keys and permit EL0 use of instructions.
For VHE kernels host EL0 (TGE && E2H) is unaffected by these settings,
and it doesn't matter how we configure HCR_EL2.{API,APK}, so we don't
bother setting them.
This does not enable support for KVM guests, since KVM manages HCR_EL2
itself when running VMs.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
Signed-off-by: Will Deacon <will.deacon@arm.com>
[kristina: backport to 4.4.y: adjust context]
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-01-26 09:42:49 +01:00
Mark Rutland
0b6c2279b7
arm64/kvm: consistently handle host HCR_EL2 flags
...
[ Backport of upstream commit 4eaed6aa2c628101246bcabc91b203bfac1193f8 ]
In KVM we define the configuration of HCR_EL2 for a VHE HOST in
HCR_HOST_VHE_FLAGS, but we don't have a similar definition for the
non-VHE host flags, and open-code HCR_RW. Further, in head.S we
open-code the flags for VHE and non-VHE configurations.
In future, we're going to want to configure more flags for the host, so
lets add a HCR_HOST_NVHE_FLAGS defintion, and consistently use both
HCR_HOST_VHE_FLAGS and HCR_HOST_NVHE_FLAGS in the kvm code and head.S.
We now use mov_q to generate the HCR_EL2 value, as we use when
configuring other registers in head.S.
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
Signed-off-by: Will Deacon <will.deacon@arm.com>
[kristina: backport to 4.4.y: non-VHE only; __deactivate_traps_nvhe in
assembly; add #include]
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-01-26 09:42:49 +01:00
Gwendal Grignou
b820fe255e
proc: Remove empty line in /proc/self/status
...
Prevent an empty line in /proc/self/status, allow iotop to work.
iotop does not like empty lines, fails with:
File "/usr/local/lib64/python2.7/site-packages/iotop/data.py", line
196, in parse_proc_pid_status
key, value = line.split(':\t', 1)
ValueError: need more than 1 value to unpack
[reading /proc/self/status]
Fixes: 84964fa3e5a0 ("proc: Provide details on speculation flaw mitigations")
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:49 +01:00
Ben Hutchings
9e86549c56
media: em28xx: Fix misplaced reset of dev->v4l::field_count
...
The backport of commit afeaade90db4 "media: em28xx: make
v4l2-compliance happier by starting sequence on zero" added a
reset on em28xx_v4l2::field_count to em28xx_ctrl_notify(),
but it should be done in em28xx_start_analog_streaming().
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:49 +01:00
Martin Blumenstingl
afd11670e2
f2fs: fix validation of the block count in sanity_check_raw_super
...
commit 88960068f25fcc3759455d85460234dcc9d43fef upstream.
Treat "block_count" from struct f2fs_super_block as 64-bit little endian
value in sanity_check_raw_super() because struct f2fs_super_block
declares "block_count" as "__le64".
This fixes a bug where the superblock validation fails on big endian
devices with the following error:
F2FS-fs (sda1): Wrong segment_count / block_count (61439 > 0)
F2FS-fs (sda1): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (sda1): Wrong segment_count / block_count (61439 > 0)
F2FS-fs (sda1): Can't find valid F2FS filesystem in 2th superblock
As result of this the partition cannot be mounted.
With this patch applied the superblock validation works fine and the
partition can be mounted again:
F2FS-fs (sda1): Mounted with checkpoint version = 7c84
My little endian x86-64 hardware was able to mount the partition without
this fix.
To confirm that mounting f2fs filesystems works on big endian machines
again I tested this on a 32-bit MIPS big endian (lantiq) device.
Fixes: 0cfe75c5b01199 ("f2fs: enhance sanity_check_raw_super() to avoid potential overflows")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:49 +01:00
Jaegeuk Kim
a0c9aa92c7
f2fs: fix missing up_read
...
commit 89d13c38501df730cbb2e02c4499da1b5187119d upstream.
This patch fixes missing up_read call.
Fixes: c9b60788fc76 ("f2fs: fix to do sanity check with block address in main area")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
b50d8b9e17
f2fs: fix invalid memory access
...
commit d3f07c049dab1a3f1740f476afd3d5e5b738c21c upstream.
syzbot found the following crash on:
HEAD commit: d9bd94c0bcaa Add linux-next specific files for 20180801
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1001189c400000
kernel config: https://syzkaller.appspot.com/x/.config?x=cc8964ea4d04518c
dashboard link: https://syzkaller.appspot.com/bug?extid=c966a82db0b14aa37e81
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+c966a82db0b14aa37e81@syzkaller.appspotmail.com
loop7: rw=12288, want=8200, limit=20
netlink: 65342 bytes leftover after parsing attributes in process `syz-executor4'.
openvswitch: netlink: Message has 8 unknown bytes.
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1 ] SMP KASAN
CPU: 1 PID: 7615 Comm: syz-executor7 Not tainted 4.18.0-rc7-next-20180801+ #29
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:PageLocked include/linux/page-flags.h:272 [inline]
RIP: 0010:f2fs_put_page fs/f2fs/f2fs.h:2011 [inline]
RIP: 0010:validate_checkpoint+0x66d/0xec0 fs/f2fs/checkpoint.c:835
Code: e8 58 05 7f fe 4c 8d 6b 80 4d 8d 74 24 08 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 c6 04 02 00 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 f4 06 00 00 4c 89 ea 4d 8b 7c 24 08 48 b8 00 00
RSP: 0018:ffff8801937cebe8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8801937cef30 RCX: ffffc90006035000
RDX: 0000000000000000 RSI: ffffffff82fd9658 RDI: 0000000000000005
RBP: ffff8801937cef58 R08: ffff8801ab254700 R09: fffff94000d9e026
R10: fffff94000d9e026 R11: ffffea0006cf0137 R12: fffffffffffffffb
R13: ffff8801937ceeb0 R14: 0000000000000003 R15: ffff880193419b40
FS: 00007f36a61d5700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc04ff93000 CR3: 00000001d0562000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
f2fs_get_valid_checkpoint+0x436/0x1ec0 fs/f2fs/checkpoint.c:860
f2fs_fill_super+0x2d42/0x8110 fs/f2fs/super.c:2883
mount_bdev+0x314/0x3e0 fs/super.c:1344
f2fs_mount+0x3c/0x50 fs/f2fs/super.c:3133
legacy_get_tree+0x131/0x460 fs/fs_context.c:729
vfs_get_tree+0x1cb/0x5c0 fs/super.c:1743
do_new_mount fs/namespace.c:2603 [inline]
do_mount+0x6f2/0x1e20 fs/namespace.c:2927
ksys_mount+0x12d/0x140 fs/namespace.c:3143
__do_sys_mount fs/namespace.c:3157 [inline]
__se_sys_mount fs/namespace.c:3154 [inline]
__x64_sys_mount+0xbe/0x150 fs/namespace.c:3154
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45943a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 bd 8a fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 9a 8a fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f36a61d4a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f36a61d4b30 RCX: 000000000045943a
RDX: 00007f36a61d4ad0 RSI: 0000000020000100 RDI: 00007f36a61d4af0
RBP: 0000000020000100 R08: 00007f36a61d4b30 R09: 00007f36a61d4ad0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000013
R13: 0000000000000000 R14: 00000000004c8ea0 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
(ftrace buffer empty)
---[ end trace bd8550c129352286 ]---
RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline]
RIP: 0010:compound_head include/linux/page-flags.h:142 [inline]
RIP: 0010:PageLocked include/linux/page-flags.h:272 [inline]
RIP: 0010:f2fs_put_page fs/f2fs/f2fs.h:2011 [inline]
RIP: 0010:validate_checkpoint+0x66d/0xec0 fs/f2fs/checkpoint.c:835
Code: e8 58 05 7f fe 4c 8d 6b 80 4d 8d 74 24 08 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 c6 04 02 00 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 f4 06 00 00 4c 89 ea 4d 8b 7c 24 08 48 b8 00 00
RSP: 0018:ffff8801937cebe8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8801937cef30 RCX: ffffc90006035000
RDX: 0000000000000000 RSI: ffffffff82fd9658 RDI: 0000000000000005
netlink: 65342 bytes leftover after parsing attributes in process `syz-executor4'.
RBP: ffff8801937cef58 R08: ffff8801ab254700 R09: fffff94000d9e026
openvswitch: netlink: Message has 8 unknown bytes.
R10: fffff94000d9e026 R11: ffffea0006cf0137 R12: fffffffffffffffb
R13: ffff8801937ceeb0 R14: 0000000000000003 R15: ffff880193419b40
FS: 00007f36a61d5700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc04ff93000 CR3: 00000001d0562000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
In validate_checkpoint(), if we failed to call get_checkpoint_version(), we
will pass returned invalid page pointer into f2fs_put_page, cause accessing
invalid memory, this patch tries to handle error path correctly to fix this
issue.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
98beb84af7
f2fs: fix to do sanity check with cp_pack_start_sum
...
commit e494c2f995d6181d6e29c4927d68e0f295ecf75b upstream.
After fuzzing, cp_pack_start_sum could be corrupted, so current log's
summary info should be wrong due to loading incorrect summary block.
Then, if segment's type in current log is exceeded NR_CURSEG_TYPE, it
can lead accessing invalid dirty_i->dirty_segmap bitmap finally.
Add sanity check for cp_pack_start_sum to fix this issue.
https://bugzilla.kernel.org/show_bug.cgi?id=200419
- Reproduce
- Kernel message (f2fs-dev w/ KASAN)
[ 3117.578432] F2FS-fs (loop0): Invalid log blocks per segment (8)
[ 3117.578445] F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock
[ 3117.581364] F2FS-fs (loop0): invalid crc_offset: 30716
[ 3117.583564] WARNING: CPU: 1 PID: 1225 at fs/f2fs/checkpoint.c:90 __get_meta_page+0x448/0x4b0
[ 3117.583570] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer joydev input_leds serio_raw snd soundcore mac_hid i2c_piix4 ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi btrfs zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear 8139too qxl ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel psmouse aes_x86_64 8139cp crypto_simd cryptd mii glue_helper pata_acpi floppy
[ 3117.584014] CPU: 1 PID: 1225 Comm: mount Not tainted 4.17.0+ #1
[ 3117.584017] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 3117.584022] RIP: 0010:__get_meta_page+0x448/0x4b0
[ 3117.584023] Code: 00 49 8d bc 24 84 00 00 00 e8 74 54 da ff 41 83 8c 24 84 00 00 00 08 4c 89 f6 4c 89 ef e8 c0 d9 95 00 48 89 ef e8 18 e3 00 00 <0f> 0b f0 80 4d 48 04 e9 0f fe ff ff 0f 0b 48 89 c7 48 89 04 24 e8
[ 3117.584072] RSP: 0018:ffff88018eb678c0 EFLAGS: 00010286
[ 3117.584082] RAX: ffff88018f0a6a78 RBX: ffffea0007a46600 RCX: ffffffff9314d1b2
[ 3117.584085] RDX: ffffffff00000001 RSI: 0000000000000000 RDI: ffff88018f0a6a98
[ 3117.584087] RBP: ffff88018ebe9980 R08: 0000000000000002 R09: 0000000000000001
[ 3117.584090] R10: 0000000000000001 R11: ffffed00326e4450 R12: ffff880193722200
[ 3117.584092] R13: ffff88018ebe9afc R14: 0000000000000206 R15: ffff88018eb67900
[ 3117.584096] FS: 00007f5694636840(0000) GS:ffff8801f3b00000(0000) knlGS:0000000000000000
[ 3117.584098] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3117.584101] CR2: 00000000016f21b8 CR3: 0000000191c22000 CR4: 00000000000006e0
[ 3117.584112] Call Trace:
[ 3117.584121] ? f2fs_set_meta_page_dirty+0x150/0x150
[ 3117.584127] ? f2fs_build_segment_manager+0xbf9/0x3190
[ 3117.584133] ? f2fs_npages_for_summary_flush+0x75/0x120
[ 3117.584145] f2fs_build_segment_manager+0xda8/0x3190
[ 3117.584151] ? f2fs_get_valid_checkpoint+0x298/0xa00
[ 3117.584156] ? f2fs_flush_sit_entries+0x10e0/0x10e0
[ 3117.584184] ? map_id_range_down+0x17c/0x1b0
[ 3117.584188] ? __put_user_ns+0x30/0x30
[ 3117.584206] ? find_next_bit+0x53/0x90
[ 3117.584237] ? cpumask_next+0x16/0x20
[ 3117.584249] f2fs_fill_super+0x1948/0x2b40
[ 3117.584258] ? f2fs_commit_super+0x1a0/0x1a0
[ 3117.584279] ? sget_userns+0x65e/0x690
[ 3117.584296] ? set_blocksize+0x88/0x130
[ 3117.584302] ? f2fs_commit_super+0x1a0/0x1a0
[ 3117.584305] mount_bdev+0x1c0/0x200
[ 3117.584310] mount_fs+0x5c/0x190
[ 3117.584320] vfs_kern_mount+0x64/0x190
[ 3117.584330] do_mount+0x2e4/0x1450
[ 3117.584343] ? lockref_put_return+0x130/0x130
[ 3117.584347] ? copy_mount_string+0x20/0x20
[ 3117.584357] ? kasan_unpoison_shadow+0x31/0x40
[ 3117.584362] ? kasan_kmalloc+0xa6/0xd0
[ 3117.584373] ? memcg_kmem_put_cache+0x16/0x90
[ 3117.584377] ? __kmalloc_track_caller+0x196/0x210
[ 3117.584383] ? _copy_from_user+0x61/0x90
[ 3117.584396] ? memdup_user+0x3e/0x60
[ 3117.584401] ksys_mount+0x7e/0xd0
[ 3117.584405] __x64_sys_mount+0x62/0x70
[ 3117.584427] do_syscall_64+0x73/0x160
[ 3117.584440] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 3117.584455] RIP: 0033:0x7f5693f14b9a
[ 3117.584456] Code: 48 8b 0d 01 c3 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ce c2 2b 00 f7 d8 64 89 01 48
[ 3117.584505] RSP: 002b:00007fff27346488 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
[ 3117.584510] RAX: ffffffffffffffda RBX: 00000000016e2030 RCX: 00007f5693f14b9a
[ 3117.584512] RDX: 00000000016e2210 RSI: 00000000016e3f30 RDI: 00000000016ee040
[ 3117.584514] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
[ 3117.584516] R10: 00000000c0ed0000 R11: 0000000000000206 R12: 00000000016ee040
[ 3117.584519] R13: 00000000016e2210 R14: 0000000000000000 R15: 0000000000000003
[ 3117.584523] ---[ end trace a8e0d899985faf31 ]---
[ 3117.685663] F2FS-fs (loop0): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix.
[ 3117.685673] F2FS-fs (loop0): recover_data: ino = 2 (i_size: recover) recovered = 1, err = 0
[ 3117.685707] ==================================================================
[ 3117.685955] BUG: KASAN: slab-out-of-bounds in __remove_dirty_segment+0xdd/0x1e0
[ 3117.686175] Read of size 8 at addr ffff88018f0a63d0 by task mount/1225
[ 3117.686477] CPU: 0 PID: 1225 Comm: mount Tainted: G W 4.17.0+ #1
[ 3117.686481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 3117.686483] Call Trace:
[ 3117.686494] dump_stack+0x71/0xab
[ 3117.686512] print_address_description+0x6b/0x290
[ 3117.686517] kasan_report+0x28e/0x390
[ 3117.686522] ? __remove_dirty_segment+0xdd/0x1e0
[ 3117.686527] __remove_dirty_segment+0xdd/0x1e0
[ 3117.686532] locate_dirty_segment+0x189/0x190
[ 3117.686538] f2fs_allocate_new_segments+0xa9/0xe0
[ 3117.686543] recover_data+0x703/0x2c20
[ 3117.686547] ? f2fs_recover_fsync_data+0x48f/0xd50
[ 3117.686553] ? ksys_mount+0x7e/0xd0
[ 3117.686564] ? policy_nodemask+0x1a/0x90
[ 3117.686567] ? policy_node+0x56/0x70
[ 3117.686571] ? add_fsync_inode+0xf0/0xf0
[ 3117.686592] ? blk_finish_plug+0x44/0x60
[ 3117.686597] ? f2fs_ra_meta_pages+0x38b/0x5e0
[ 3117.686602] ? find_inode_fast+0xac/0xc0
[ 3117.686606] ? f2fs_is_valid_blkaddr+0x320/0x320
[ 3117.686618] ? __radix_tree_lookup+0x150/0x150
[ 3117.686633] ? dqget+0x670/0x670
[ 3117.686648] ? pagecache_get_page+0x29/0x410
[ 3117.686656] ? kmem_cache_alloc+0x176/0x1e0
[ 3117.686660] ? f2fs_is_valid_blkaddr+0x11d/0x320
[ 3117.686664] f2fs_recover_fsync_data+0xc23/0xd50
[ 3117.686670] ? f2fs_space_for_roll_forward+0x60/0x60
[ 3117.686674] ? rb_insert_color+0x323/0x3d0
[ 3117.686678] ? f2fs_recover_orphan_inodes+0xa5/0x700
[ 3117.686683] ? proc_register+0x153/0x1d0
[ 3117.686686] ? f2fs_remove_orphan_inode+0x10/0x10
[ 3117.686695] ? f2fs_attr_store+0x50/0x50
[ 3117.686700] ? proc_create_single_data+0x52/0x60
[ 3117.686707] f2fs_fill_super+0x1d06/0x2b40
[ 3117.686728] ? f2fs_commit_super+0x1a0/0x1a0
[ 3117.686735] ? sget_userns+0x65e/0x690
[ 3117.686740] ? set_blocksize+0x88/0x130
[ 3117.686745] ? f2fs_commit_super+0x1a0/0x1a0
[ 3117.686748] mount_bdev+0x1c0/0x200
[ 3117.686753] mount_fs+0x5c/0x190
[ 3117.686758] vfs_kern_mount+0x64/0x190
[ 3117.686762] do_mount+0x2e4/0x1450
[ 3117.686769] ? lockref_put_return+0x130/0x130
[ 3117.686773] ? copy_mount_string+0x20/0x20
[ 3117.686777] ? kasan_unpoison_shadow+0x31/0x40
[ 3117.686780] ? kasan_kmalloc+0xa6/0xd0
[ 3117.686786] ? memcg_kmem_put_cache+0x16/0x90
[ 3117.686790] ? __kmalloc_track_caller+0x196/0x210
[ 3117.686795] ? _copy_from_user+0x61/0x90
[ 3117.686801] ? memdup_user+0x3e/0x60
[ 3117.686804] ksys_mount+0x7e/0xd0
[ 3117.686809] __x64_sys_mount+0x62/0x70
[ 3117.686816] do_syscall_64+0x73/0x160
[ 3117.686824] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 3117.686829] RIP: 0033:0x7f5693f14b9a
[ 3117.686830] Code: 48 8b 0d 01 c3 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ce c2 2b 00 f7 d8 64 89 01 48
[ 3117.686887] RSP: 002b:00007fff27346488 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
[ 3117.686892] RAX: ffffffffffffffda RBX: 00000000016e2030 RCX: 00007f5693f14b9a
[ 3117.686894] RDX: 00000000016e2210 RSI: 00000000016e3f30 RDI: 00000000016ee040
[ 3117.686896] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
[ 3117.686899] R10: 00000000c0ed0000 R11: 0000000000000206 R12: 00000000016ee040
[ 3117.686901] R13: 00000000016e2210 R14: 0000000000000000 R15: 0000000000000003
[ 3117.687005] Allocated by task 1225:
[ 3117.687152] kasan_kmalloc+0xa6/0xd0
[ 3117.687157] kmem_cache_alloc_trace+0xfd/0x200
[ 3117.687161] f2fs_build_segment_manager+0x2d09/0x3190
[ 3117.687165] f2fs_fill_super+0x1948/0x2b40
[ 3117.687168] mount_bdev+0x1c0/0x200
[ 3117.687171] mount_fs+0x5c/0x190
[ 3117.687174] vfs_kern_mount+0x64/0x190
[ 3117.687177] do_mount+0x2e4/0x1450
[ 3117.687180] ksys_mount+0x7e/0xd0
[ 3117.687182] __x64_sys_mount+0x62/0x70
[ 3117.687186] do_syscall_64+0x73/0x160
[ 3117.687190] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 3117.687285] Freed by task 19:
[ 3117.687412] __kasan_slab_free+0x137/0x190
[ 3117.687416] kfree+0x8b/0x1b0
[ 3117.687460] ttm_bo_man_put_node+0x61/0x80 [ttm]
[ 3117.687476] ttm_bo_cleanup_refs+0x15f/0x250 [ttm]
[ 3117.687492] ttm_bo_delayed_delete+0x2f0/0x300 [ttm]
[ 3117.687507] ttm_bo_delayed_workqueue+0x17/0x50 [ttm]
[ 3117.687528] process_one_work+0x2f9/0x740
[ 3117.687531] worker_thread+0x78/0x6b0
[ 3117.687541] kthread+0x177/0x1c0
[ 3117.687545] ret_from_fork+0x35/0x40
[ 3117.687638] The buggy address belongs to the object at ffff88018f0a6300
which belongs to the cache kmalloc-192 of size 192
[ 3117.688014] The buggy address is located 16 bytes to the right of
192-byte region [ffff88018f0a6300, ffff88018f0a63c0)
[ 3117.688382] The buggy address belongs to the page:
[ 3117.688554] page:ffffea00063c2980 count:1 mapcount:0 mapping:ffff8801f3403180 index:0x0
[ 3117.688788] flags: 0x17fff8000000100(slab)
[ 3117.688944] raw: 017fff8000000100 ffffea00063c2840 0000000e0000000e ffff8801f3403180
[ 3117.689166] raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
[ 3117.689386] page dumped because: kasan: bad access detected
[ 3117.689653] Memory state around the buggy address:
[ 3117.689816] ffff88018f0a6280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
[ 3117.690027] ffff88018f0a6300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 3117.690239] >ffff88018f0a6380: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 3117.690448] ^
[ 3117.690644] ffff88018f0a6400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 3117.690868] ffff88018f0a6480: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
[ 3117.691077] ==================================================================
[ 3117.691290] Disabling lock debugging due to kernel taint
[ 3117.693893] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
[ 3117.694120] PGD 80000001f01bc067 P4D 80000001f01bc067 PUD 1d9638067 PMD 0
[ 3117.694338] Oops: 0002 [#1 ] SMP KASAN PTI
[ 3117.694490] CPU: 1 PID: 1225 Comm: mount Tainted: G B W 4.17.0+ #1
[ 3117.694703] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 3117.695073] RIP: 0010:__remove_dirty_segment+0xe2/0x1e0
[ 3117.695246] Code: c4 48 89 c7 e8 cf bb d7 ff 45 0f b6 24 24 41 83 e4 3f 44 88 64 24 07 41 83 e4 3f 4a 8d 7c e3 08 e8 b3 bc d7 ff 4a 8b 4c e3 08 <f0> 4c 0f b3 29 0f 82 94 00 00 00 48 8d bd 20 04 00 00 e8 97 bb d7
[ 3117.695793] RSP: 0018:ffff88018eb67638 EFLAGS: 00010292
[ 3117.695969] RAX: 0000000000000000 RBX: ffff88018f0a6300 RCX: 0000000000000000
[ 3117.696182] RDX: 0000000000000000 RSI: 0000000000000297 RDI: 0000000000000297
[ 3117.696391] RBP: ffff88018ebe9980 R08: ffffed003e743ebb R09: ffffed003e743ebb
[ 3117.696604] R10: 0000000000000001 R11: ffffed003e743eba R12: 0000000000000019
[ 3117.696813] R13: 0000000000000014 R14: 0000000000000320 R15: ffff88018ebe99e0
[ 3117.697032] FS: 00007f5694636840(0000) GS:ffff8801f3b00000(0000) knlGS:0000000000000000
[ 3117.697280] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3117.702357] CR2: 00007fe89bb1a000 CR3: 0000000191c22000 CR4: 00000000000006e0
[ 3117.707235] Call Trace:
[ 3117.712077] locate_dirty_segment+0x189/0x190
[ 3117.716891] f2fs_allocate_new_segments+0xa9/0xe0
[ 3117.721617] recover_data+0x703/0x2c20
[ 3117.726316] ? f2fs_recover_fsync_data+0x48f/0xd50
[ 3117.730957] ? ksys_mount+0x7e/0xd0
[ 3117.735573] ? policy_nodemask+0x1a/0x90
[ 3117.740198] ? policy_node+0x56/0x70
[ 3117.744829] ? add_fsync_inode+0xf0/0xf0
[ 3117.749487] ? blk_finish_plug+0x44/0x60
[ 3117.754152] ? f2fs_ra_meta_pages+0x38b/0x5e0
[ 3117.758831] ? find_inode_fast+0xac/0xc0
[ 3117.763448] ? f2fs_is_valid_blkaddr+0x320/0x320
[ 3117.768046] ? __radix_tree_lookup+0x150/0x150
[ 3117.772603] ? dqget+0x670/0x670
[ 3117.777159] ? pagecache_get_page+0x29/0x410
[ 3117.781648] ? kmem_cache_alloc+0x176/0x1e0
[ 3117.786067] ? f2fs_is_valid_blkaddr+0x11d/0x320
[ 3117.790476] f2fs_recover_fsync_data+0xc23/0xd50
[ 3117.794790] ? f2fs_space_for_roll_forward+0x60/0x60
[ 3117.799086] ? rb_insert_color+0x323/0x3d0
[ 3117.803304] ? f2fs_recover_orphan_inodes+0xa5/0x700
[ 3117.807563] ? proc_register+0x153/0x1d0
[ 3117.811766] ? f2fs_remove_orphan_inode+0x10/0x10
[ 3117.815947] ? f2fs_attr_store+0x50/0x50
[ 3117.820087] ? proc_create_single_data+0x52/0x60
[ 3117.824262] f2fs_fill_super+0x1d06/0x2b40
[ 3117.828367] ? f2fs_commit_super+0x1a0/0x1a0
[ 3117.832432] ? sget_userns+0x65e/0x690
[ 3117.836500] ? set_blocksize+0x88/0x130
[ 3117.840501] ? f2fs_commit_super+0x1a0/0x1a0
[ 3117.844420] mount_bdev+0x1c0/0x200
[ 3117.848275] mount_fs+0x5c/0x190
[ 3117.852053] vfs_kern_mount+0x64/0x190
[ 3117.855810] do_mount+0x2e4/0x1450
[ 3117.859441] ? lockref_put_return+0x130/0x130
[ 3117.862996] ? copy_mount_string+0x20/0x20
[ 3117.866417] ? kasan_unpoison_shadow+0x31/0x40
[ 3117.869719] ? kasan_kmalloc+0xa6/0xd0
[ 3117.872948] ? memcg_kmem_put_cache+0x16/0x90
[ 3117.876121] ? __kmalloc_track_caller+0x196/0x210
[ 3117.879333] ? _copy_from_user+0x61/0x90
[ 3117.882467] ? memdup_user+0x3e/0x60
[ 3117.885604] ksys_mount+0x7e/0xd0
[ 3117.888700] __x64_sys_mount+0x62/0x70
[ 3117.891742] do_syscall_64+0x73/0x160
[ 3117.894692] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 3117.897669] RIP: 0033:0x7f5693f14b9a
[ 3117.900563] Code: 48 8b 0d 01 c3 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ce c2 2b 00 f7 d8 64 89 01 48
[ 3117.906922] RSP: 002b:00007fff27346488 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
[ 3117.910159] RAX: ffffffffffffffda RBX: 00000000016e2030 RCX: 00007f5693f14b9a
[ 3117.913469] RDX: 00000000016e2210 RSI: 00000000016e3f30 RDI: 00000000016ee040
[ 3117.916764] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
[ 3117.920071] R10: 00000000c0ed0000 R11: 0000000000000206 R12: 00000000016ee040
[ 3117.923393] R13: 00000000016e2210 R14: 0000000000000000 R15: 0000000000000003
[ 3117.926680] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer joydev input_leds serio_raw snd soundcore mac_hid i2c_piix4 ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi btrfs zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear 8139too qxl ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel psmouse aes_x86_64 8139cp crypto_simd cryptd mii glue_helper pata_acpi floppy
[ 3117.949979] CR2: 0000000000000000
[ 3117.954283] ---[ end trace a8e0d899985faf32 ]---
[ 3117.958575] RIP: 0010:__remove_dirty_segment+0xe2/0x1e0
[ 3117.962810] Code: c4 48 89 c7 e8 cf bb d7 ff 45 0f b6 24 24 41 83 e4 3f 44 88 64 24 07 41 83 e4 3f 4a 8d 7c e3 08 e8 b3 bc d7 ff 4a 8b 4c e3 08 <f0> 4c 0f b3 29 0f 82 94 00 00 00 48 8d bd 20 04 00 00 e8 97 bb d7
[ 3117.971789] RSP: 0018:ffff88018eb67638 EFLAGS: 00010292
[ 3117.976333] RAX: 0000000000000000 RBX: ffff88018f0a6300 RCX: 0000000000000000
[ 3117.980926] RDX: 0000000000000000 RSI: 0000000000000297 RDI: 0000000000000297
[ 3117.985497] RBP: ffff88018ebe9980 R08: ffffed003e743ebb R09: ffffed003e743ebb
[ 3117.990098] R10: 0000000000000001 R11: ffffed003e743eba R12: 0000000000000019
[ 3117.994761] R13: 0000000000000014 R14: 0000000000000320 R15: ffff88018ebe99e0
[ 3117.999392] FS: 00007f5694636840(0000) GS:ffff8801f3b00000(0000) knlGS:0000000000000000
[ 3118.004096] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3118.008816] CR2: 00007fe89bb1a000 CR3: 0000000191c22000 CR4: 00000000000006e0
- Location
https://elixir.bootlin.com/linux/v4.18-rc3/source/fs/f2fs/segment.c#L775
if (test_and_clear_bit(segno, dirty_i->dirty_segmap[t]))
dirty_i->nr_dirty[t]--;
Here dirty_i->dirty_segmap[t] can be NULL which leads to crash in test_and_clear_bit()
Reported-by Wen Xu <wen.xu@gatech.edu>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4: The function is called sanity_check_ckpt()]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
4901e126b6
f2fs: fix to do sanity check with block address in main area v2
...
commit 91291e9998d208370eb8156c760691b873bd7522 upstream.
This patch adds f2fs_is_valid_blkaddr() in below functions to do sanity
check with block address to avoid pentential panic:
- f2fs_grab_read_bio()
- __written_first_block()
https://bugzilla.kernel.org/show_bug.cgi?id=200465
- Reproduce
- POC (poc.c)
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/xattr.h>
#include <dirent.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <linux/falloc.h>
#include <linux/loop.h>
static void activity(char *mpoint) {
char *xattr;
int err;
err = asprintf(&xattr, "%s/foo/bar/xattr", mpoint);
char buf2[113];
memset(buf2, 0, sizeof(buf2));
listxattr(xattr, buf2, sizeof(buf2));
}
int main(int argc, char *argv[]) {
activity(argv[1]);
return 0;
}
- kernel message
[ 844.718738] F2FS-fs (loop0): Mounted with checkpoint version = 2
[ 846.430929] F2FS-fs (loop0): access invalid blkaddr:1024
[ 846.431058] WARNING: CPU: 1 PID: 1249 at fs/f2fs/checkpoint.c:154 f2fs_is_valid_blkaddr+0x10f/0x160
[ 846.431059] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
[ 846.431310] CPU: 1 PID: 1249 Comm: a.out Not tainted 4.18.0-rc3+ #1
[ 846.431312] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 846.431315] RIP: 0010:f2fs_is_valid_blkaddr+0x10f/0x160
[ 846.431316] Code: 00 eb ed 31 c0 83 fa 05 75 ae 48 83 ec 08 48 8b 3f 89 f1 48 c7 c2 fc 0b 0f 8b 48 c7 c6 8b d7 09 8b 88 44 24 07 e8 61 8b ff ff <0f> 0b 0f b6 44 24 07 48 83 c4 08 eb 81 4c 8b 47 10 8b 8f 38 04 00
[ 846.431347] RSP: 0018:ffff961c414a7bc0 EFLAGS: 00010282
[ 846.431349] RAX: 0000000000000000 RBX: ffffc5f787b8ea80 RCX: 0000000000000000
[ 846.431350] RDX: 0000000000000000 RSI: ffff89dfffd165d8 RDI: ffff89dfffd165d8
[ 846.431351] RBP: ffff961c414a7c20 R08: 0000000000000001 R09: 0000000000000248
[ 846.431353] R10: 0000000000000000 R11: 0000000000000248 R12: 0000000000000007
[ 846.431369] R13: ffff89dff5492800 R14: ffff89dfae3aa000 R15: ffff89dff4ff88d0
[ 846.431372] FS: 00007f882e2fb700(0000) GS:ffff89dfffd00000(0000) knlGS:0000000000000000
[ 846.431373] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 846.431374] CR2: 0000000001a88008 CR3: 00000001eb572000 CR4: 00000000000006e0
[ 846.431384] Call Trace:
[ 846.431426] f2fs_iget+0x6f4/0xe70
[ 846.431430] ? f2fs_find_entry+0x71/0x90
[ 846.431432] f2fs_lookup+0x1aa/0x390
[ 846.431452] __lookup_slow+0x97/0x150
[ 846.431459] lookup_slow+0x35/0x50
[ 846.431462] walk_component+0x1c6/0x470
[ 846.431479] ? memcg_kmem_charge_memcg+0x70/0x90
[ 846.431488] ? page_add_file_rmap+0x13/0x200
[ 846.431491] path_lookupat+0x76/0x230
[ 846.431501] ? __alloc_pages_nodemask+0xfc/0x280
[ 846.431504] filename_lookup+0xb8/0x1a0
[ 846.431534] ? _cond_resched+0x16/0x40
[ 846.431541] ? kmem_cache_alloc+0x160/0x1d0
[ 846.431549] ? path_listxattr+0x41/0xa0
[ 846.431551] path_listxattr+0x41/0xa0
[ 846.431570] do_syscall_64+0x55/0x100
[ 846.431583] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 846.431607] RIP: 0033:0x7f882de1c0d7
[ 846.431607] Code: f0 ff ff 73 01 c3 48 8b 0d be dd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 c2 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 dd 2b 00 f7 d8 64 89 01 48
[ 846.431639] RSP: 002b:00007ffe8e66c238 EFLAGS: 00000202 ORIG_RAX: 00000000000000c2
[ 846.431641] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f882de1c0d7
[ 846.431642] RDX: 0000000000000071 RSI: 00007ffe8e66c280 RDI: 0000000001a880c0
[ 846.431643] RBP: 00007ffe8e66c300 R08: 0000000001a88010 R09: 0000000000000000
[ 846.431645] R10: 00000000000001ab R11: 0000000000000202 R12: 0000000000400550
[ 846.431646] R13: 00007ffe8e66c400 R14: 0000000000000000 R15: 0000000000000000
[ 846.431648] ---[ end trace abca54df39d14f5c ]---
[ 846.431651] F2FS-fs (loop0): invalid blkaddr: 1024, type: 5, run fsck to fix.
[ 846.431762] WARNING: CPU: 1 PID: 1249 at fs/f2fs/f2fs.h:2697 f2fs_iget+0xd17/0xe70
[ 846.431763] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
[ 846.431797] CPU: 1 PID: 1249 Comm: a.out Tainted: G W 4.18.0-rc3+ #1
[ 846.431798] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 846.431800] RIP: 0010:f2fs_iget+0xd17/0xe70
[ 846.431801] Code: ff ff 48 63 d8 e9 e1 f6 ff ff 48 8b 45 c8 41 b8 05 00 00 00 48 c7 c2 d8 e8 0e 8b 48 c7 c6 1d b0 0a 8b 48 8b 38 e8 f9 b4 00 00 <0f> 0b 48 8b 45 c8 f0 80 48 48 04 e9 d8 f9 ff ff 0f 0b 48 8b 43 18
[ 846.431832] RSP: 0018:ffff961c414a7bd0 EFLAGS: 00010282
[ 846.431834] RAX: 0000000000000000 RBX: ffffc5f787b8ea80 RCX: 0000000000000006
[ 846.431835] RDX: 0000000000000000 RSI: 0000000000000096 RDI: ffff89dfffd165d0
[ 846.431836] RBP: ffff961c414a7c20 R08: 0000000000000000 R09: 0000000000000273
[ 846.431837] R10: 0000000000000000 R11: ffff89dfad50ca60 R12: 0000000000000007
[ 846.431838] R13: ffff89dff5492800 R14: ffff89dfae3aa000 R15: ffff89dff4ff88d0
[ 846.431840] FS: 00007f882e2fb700(0000) GS:ffff89dfffd00000(0000) knlGS:0000000000000000
[ 846.431841] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 846.431842] CR2: 0000000001a88008 CR3: 00000001eb572000 CR4: 00000000000006e0
[ 846.431846] Call Trace:
[ 846.431850] ? f2fs_find_entry+0x71/0x90
[ 846.431853] f2fs_lookup+0x1aa/0x390
[ 846.431856] __lookup_slow+0x97/0x150
[ 846.431858] lookup_slow+0x35/0x50
[ 846.431874] walk_component+0x1c6/0x470
[ 846.431878] ? memcg_kmem_charge_memcg+0x70/0x90
[ 846.431880] ? page_add_file_rmap+0x13/0x200
[ 846.431882] path_lookupat+0x76/0x230
[ 846.431884] ? __alloc_pages_nodemask+0xfc/0x280
[ 846.431886] filename_lookup+0xb8/0x1a0
[ 846.431890] ? _cond_resched+0x16/0x40
[ 846.431891] ? kmem_cache_alloc+0x160/0x1d0
[ 846.431894] ? path_listxattr+0x41/0xa0
[ 846.431896] path_listxattr+0x41/0xa0
[ 846.431898] do_syscall_64+0x55/0x100
[ 846.431901] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 846.431902] RIP: 0033:0x7f882de1c0d7
[ 846.431903] Code: f0 ff ff 73 01 c3 48 8b 0d be dd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 c2 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 dd 2b 00 f7 d8 64 89 01 48
[ 846.431934] RSP: 002b:00007ffe8e66c238 EFLAGS: 00000202 ORIG_RAX: 00000000000000c2
[ 846.431936] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f882de1c0d7
[ 846.431937] RDX: 0000000000000071 RSI: 00007ffe8e66c280 RDI: 0000000001a880c0
[ 846.431939] RBP: 00007ffe8e66c300 R08: 0000000001a88010 R09: 0000000000000000
[ 846.431940] R10: 00000000000001ab R11: 0000000000000202 R12: 0000000000400550
[ 846.431941] R13: 00007ffe8e66c400 R14: 0000000000000000 R15: 0000000000000000
[ 846.431943] ---[ end trace abca54df39d14f5d ]---
[ 846.432033] F2FS-fs (loop0): access invalid blkaddr:1024
[ 846.432051] WARNING: CPU: 1 PID: 1249 at fs/f2fs/checkpoint.c:154 f2fs_is_valid_blkaddr+0x10f/0x160
[ 846.432051] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
[ 846.432085] CPU: 1 PID: 1249 Comm: a.out Tainted: G W 4.18.0-rc3+ #1
[ 846.432086] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 846.432089] RIP: 0010:f2fs_is_valid_blkaddr+0x10f/0x160
[ 846.432089] Code: 00 eb ed 31 c0 83 fa 05 75 ae 48 83 ec 08 48 8b 3f 89 f1 48 c7 c2 fc 0b 0f 8b 48 c7 c6 8b d7 09 8b 88 44 24 07 e8 61 8b ff ff <0f> 0b 0f b6 44 24 07 48 83 c4 08 eb 81 4c 8b 47 10 8b 8f 38 04 00
[ 846.432120] RSP: 0018:ffff961c414a7900 EFLAGS: 00010286
[ 846.432122] RAX: 0000000000000000 RBX: 0000000000000400 RCX: 0000000000000006
[ 846.432123] RDX: 0000000000000000 RSI: 0000000000000096 RDI: ffff89dfffd165d0
[ 846.432124] RBP: ffff89dff5492800 R08: 0000000000000001 R09: 000000000000029d
[ 846.432125] R10: ffff961c414a7820 R11: 000000000000029d R12: 0000000000000400
[ 846.432126] R13: 0000000000000000 R14: ffff89dff4ff88d0 R15: 0000000000000000
[ 846.432128] FS: 00007f882e2fb700(0000) GS:ffff89dfffd00000(0000) knlGS:0000000000000000
[ 846.432130] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 846.432131] CR2: 0000000001a88008 CR3: 00000001eb572000 CR4: 00000000000006e0
[ 846.432135] Call Trace:
[ 846.432151] f2fs_wait_on_block_writeback+0x20/0x110
[ 846.432158] f2fs_grab_read_bio+0xbc/0xe0
[ 846.432161] f2fs_submit_page_read+0x21/0x280
[ 846.432163] f2fs_get_read_data_page+0xb7/0x3c0
[ 846.432165] f2fs_get_lock_data_page+0x29/0x1e0
[ 846.432167] f2fs_get_new_data_page+0x148/0x550
[ 846.432170] f2fs_add_regular_entry+0x1d2/0x550
[ 846.432178] ? __switch_to+0x12f/0x460
[ 846.432181] f2fs_add_dentry+0x6a/0xd0
[ 846.432184] f2fs_do_add_link+0xe9/0x140
[ 846.432186] __recover_dot_dentries+0x260/0x280
[ 846.432189] f2fs_lookup+0x343/0x390
[ 846.432193] __lookup_slow+0x97/0x150
[ 846.432195] lookup_slow+0x35/0x50
[ 846.432208] walk_component+0x1c6/0x470
[ 846.432212] ? memcg_kmem_charge_memcg+0x70/0x90
[ 846.432215] ? page_add_file_rmap+0x13/0x200
[ 846.432217] path_lookupat+0x76/0x230
[ 846.432219] ? __alloc_pages_nodemask+0xfc/0x280
[ 846.432221] filename_lookup+0xb8/0x1a0
[ 846.432224] ? _cond_resched+0x16/0x40
[ 846.432226] ? kmem_cache_alloc+0x160/0x1d0
[ 846.432228] ? path_listxattr+0x41/0xa0
[ 846.432230] path_listxattr+0x41/0xa0
[ 846.432233] do_syscall_64+0x55/0x100
[ 846.432235] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 846.432237] RIP: 0033:0x7f882de1c0d7
[ 846.432237] Code: f0 ff ff 73 01 c3 48 8b 0d be dd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 c2 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 dd 2b 00 f7 d8 64 89 01 48
[ 846.432269] RSP: 002b:00007ffe8e66c238 EFLAGS: 00000202 ORIG_RAX: 00000000000000c2
[ 846.432271] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f882de1c0d7
[ 846.432272] RDX: 0000000000000071 RSI: 00007ffe8e66c280 RDI: 0000000001a880c0
[ 846.432273] RBP: 00007ffe8e66c300 R08: 0000000001a88010 R09: 0000000000000000
[ 846.432274] R10: 00000000000001ab R11: 0000000000000202 R12: 0000000000400550
[ 846.432275] R13: 00007ffe8e66c400 R14: 0000000000000000 R15: 0000000000000000
[ 846.432277] ---[ end trace abca54df39d14f5e ]---
[ 846.432279] F2FS-fs (loop0): invalid blkaddr: 1024, type: 5, run fsck to fix.
[ 846.432376] WARNING: CPU: 1 PID: 1249 at fs/f2fs/f2fs.h:2697 f2fs_wait_on_block_writeback+0xb1/0x110
[ 846.432376] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
[ 846.432410] CPU: 1 PID: 1249 Comm: a.out Tainted: G W 4.18.0-rc3+ #1
[ 846.432411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 846.432413] RIP: 0010:f2fs_wait_on_block_writeback+0xb1/0x110
[ 846.432414] Code: 66 90 f0 ff 4b 34 74 59 5b 5d c3 48 8b 7d 00 41 b8 05 00 00 00 89 d9 48 c7 c2 d8 e8 0e 8b 48 c7 c6 1d b0 0a 8b e8 df bc fd ff <0f> 0b f0 80 4d 48 04 e9 67 ff ff ff 48 8b 03 48 c1 e8 37 83 e0 07
[ 846.432445] RSP: 0018:ffff961c414a7910 EFLAGS: 00010286
[ 846.432447] RAX: 0000000000000000 RBX: 0000000000000400 RCX: 0000000000000006
[ 846.432448] RDX: 0000000000000000 RSI: 0000000000000092 RDI: ffff89dfffd165d0
[ 846.432449] RBP: ffff89dff5492800 R08: 0000000000000000 R09: 00000000000002d1
[ 846.432450] R10: ffff961c414a7820 R11: ffff89dfad50cf80 R12: 0000000000000400
[ 846.432451] R13: 0000000000000000 R14: ffff89dff4ff88d0 R15: 0000000000000000
[ 846.432453] FS: 00007f882e2fb700(0000) GS:ffff89dfffd00000(0000) knlGS:0000000000000000
[ 846.432454] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 846.432455] CR2: 0000000001a88008 CR3: 00000001eb572000 CR4: 00000000000006e0
[ 846.432459] Call Trace:
[ 846.432463] f2fs_grab_read_bio+0xbc/0xe0
[ 846.432464] f2fs_submit_page_read+0x21/0x280
[ 846.432466] f2fs_get_read_data_page+0xb7/0x3c0
[ 846.432468] f2fs_get_lock_data_page+0x29/0x1e0
[ 846.432470] f2fs_get_new_data_page+0x148/0x550
[ 846.432473] f2fs_add_regular_entry+0x1d2/0x550
[ 846.432475] ? __switch_to+0x12f/0x460
[ 846.432477] f2fs_add_dentry+0x6a/0xd0
[ 846.432480] f2fs_do_add_link+0xe9/0x140
[ 846.432483] __recover_dot_dentries+0x260/0x280
[ 846.432485] f2fs_lookup+0x343/0x390
[ 846.432488] __lookup_slow+0x97/0x150
[ 846.432490] lookup_slow+0x35/0x50
[ 846.432505] walk_component+0x1c6/0x470
[ 846.432509] ? memcg_kmem_charge_memcg+0x70/0x90
[ 846.432511] ? page_add_file_rmap+0x13/0x200
[ 846.432513] path_lookupat+0x76/0x230
[ 846.432515] ? __alloc_pages_nodemask+0xfc/0x280
[ 846.432517] filename_lookup+0xb8/0x1a0
[ 846.432520] ? _cond_resched+0x16/0x40
[ 846.432522] ? kmem_cache_alloc+0x160/0x1d0
[ 846.432525] ? path_listxattr+0x41/0xa0
[ 846.432526] path_listxattr+0x41/0xa0
[ 846.432529] do_syscall_64+0x55/0x100
[ 846.432531] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 846.432533] RIP: 0033:0x7f882de1c0d7
[ 846.432533] Code: f0 ff ff 73 01 c3 48 8b 0d be dd 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 c2 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 dd 2b 00 f7 d8 64 89 01 48
[ 846.432565] RSP: 002b:00007ffe8e66c238 EFLAGS: 00000202 ORIG_RAX: 00000000000000c2
[ 846.432567] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f882de1c0d7
[ 846.432568] RDX: 0000000000000071 RSI: 00007ffe8e66c280 RDI: 0000000001a880c0
[ 846.432569] RBP: 00007ffe8e66c300 R08: 0000000001a88010 R09: 0000000000000000
[ 846.432570] R10: 00000000000001ab R11: 0000000000000202 R12: 0000000000400550
[ 846.432571] R13: 00007ffe8e66c400 R14: 0000000000000000 R15: 0000000000000000
[ 846.432573] ---[ end trace abca54df39d14f5f ]---
[ 846.434280] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[ 846.434424] PGD 80000001ebd3a067 P4D 80000001ebd3a067 PUD 1eb1ae067 PMD 0
[ 846.434551] Oops: 0000 [#1 ] SMP PTI
[ 846.434697] CPU: 0 PID: 44 Comm: kworker/u5:0 Tainted: G W 4.18.0-rc3+ #1
[ 846.434805] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 846.435000] Workqueue: fscrypt_read_queue decrypt_work
[ 846.435174] RIP: 0010:fscrypt_do_page_crypto+0x6e/0x2d0
[ 846.435351] Code: 00 65 48 8b 04 25 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e8 43 c2 e0 ff 49 8b 86 48 02 00 00 85 ed c7 44 24 70 00 00 00 00 <48> 8b 58 08 0f 84 14 02 00 00 48 8b 78 10 48 8b 0c 24 48 c7 84 24
[ 846.435696] RSP: 0018:ffff961c40f9bd60 EFLAGS: 00010206
[ 846.435870] RAX: 0000000000000000 RBX: ffffc5f787719b80 RCX: ffffc5f787719b80
[ 846.436051] RDX: ffffffff8b9f4b88 RSI: ffffffff8b0ae622 RDI: ffff961c40f9bdb8
[ 846.436261] RBP: 0000000000001000 R08: ffffc5f787719b80 R09: 0000000000001000
[ 846.436433] R10: 0000000000000018 R11: fefefefefefefeff R12: ffffc5f787719b80
[ 846.436562] R13: ffffc5f787719b80 R14: ffff89dff4ff88d0 R15: 0ffff89dfaddee60
[ 846.436658] FS: 0000000000000000(0000) GS:ffff89dfffc00000(0000) knlGS:0000000000000000
[ 846.436758] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 846.436898] CR2: 0000000000000008 CR3: 00000001eddd0000 CR4: 00000000000006f0
[ 846.437001] Call Trace:
[ 846.437181] ? check_preempt_wakeup+0xf2/0x230
[ 846.437276] ? check_preempt_curr+0x7c/0x90
[ 846.437370] fscrypt_decrypt_page+0x48/0x4d
[ 846.437466] __fscrypt_decrypt_bio+0x5b/0x90
[ 846.437542] decrypt_work+0x12/0x20
[ 846.437651] process_one_work+0x15e/0x3d0
[ 846.437740] worker_thread+0x4c/0x440
[ 846.437848] kthread+0xf8/0x130
[ 846.437938] ? rescuer_thread+0x350/0x350
[ 846.438022] ? kthread_associate_blkcg+0x90/0x90
[ 846.438117] ret_from_fork+0x35/0x40
[ 846.438201] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_timer snd input_leds joydev soundcore serio_raw i2c_piix4 mac_hid ib_iser rdma_cm iw_cm ib_cm ib_core configfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 raid10 raid456 libcrc32c async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq raid1 raid0 multipath linear qxl ttm crct10dif_pclmul crc32_pclmul drm_kms_helper ghash_clmulni_intel syscopyarea sysfillrect sysimgblt fb_sys_fops pcbc drm 8139too aesni_intel 8139cp floppy psmouse mii aes_x86_64 crypto_simd pata_acpi cryptd glue_helper
[ 846.438653] CR2: 0000000000000008
[ 846.438713] ---[ end trace abca54df39d14f60 ]---
[ 846.438796] RIP: 0010:fscrypt_do_page_crypto+0x6e/0x2d0
[ 846.438844] Code: 00 65 48 8b 04 25 28 00 00 00 48 89 84 24 88 00 00 00 31 c0 e8 43 c2 e0 ff 49 8b 86 48 02 00 00 85 ed c7 44 24 70 00 00 00 00 <48> 8b 58 08 0f 84 14 02 00 00 48 8b 78 10 48 8b 0c 24 48 c7 84 24
[ 846.439084] RSP: 0018:ffff961c40f9bd60 EFLAGS: 00010206
[ 846.439176] RAX: 0000000000000000 RBX: ffffc5f787719b80 RCX: ffffc5f787719b80
[ 846.440927] RDX: ffffffff8b9f4b88 RSI: ffffffff8b0ae622 RDI: ffff961c40f9bdb8
[ 846.442083] RBP: 0000000000001000 R08: ffffc5f787719b80 R09: 0000000000001000
[ 846.443284] R10: 0000000000000018 R11: fefefefefefefeff R12: ffffc5f787719b80
[ 846.444448] R13: ffffc5f787719b80 R14: ffff89dff4ff88d0 R15: 0ffff89dfaddee60
[ 846.445558] FS: 0000000000000000(0000) GS:ffff89dfffc00000(0000) knlGS:0000000000000000
[ 846.446687] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 846.447796] CR2: 0000000000000008 CR3: 00000001eddd0000 CR4: 00000000000006f0
- Location
https://elixir.bootlin.com/linux/v4.18-rc4/source/fs/crypto/crypto.c#L149
struct crypto_skcipher *tfm = ci->ci_ctfm;
Here ci can be NULL
Note that this issue maybe require CONFIG_F2FS_FS_ENCRYPTION=y to reproduce.
Reported-by Wen Xu <wen.xu@gatech.edu>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
bdffda8db8
f2fs: fix to do sanity check with block address in main area
...
commit c9b60788fc760d136211853f10ce73dc152d1f4a upstream.
This patch add to do sanity check with below field:
- cp_pack_total_block_count
- blkaddr of data/node
- extent info
- Overview
BUG() in verify_block_addr() when writing to a corrupted f2fs image
- Reproduce (4.18 upstream kernel)
- POC (poc.c)
static void activity(char *mpoint) {
char *foo_bar_baz;
int err;
static int buf[8192];
memset(buf, 0, sizeof(buf));
err = asprintf(&foo_bar_baz, "%s/foo/bar/baz", mpoint);
int fd = open(foo_bar_baz, O_RDWR | O_TRUNC, 0777);
if (fd >= 0) {
write(fd, (char *)buf, sizeof(buf));
fdatasync(fd);
close(fd);
}
}
int main(int argc, char *argv[]) {
activity(argv[1]);
return 0;
}
- Kernel message
[ 689.349473] F2FS-fs (loop0): Mounted with checkpoint version = 3
[ 699.728662] WARNING: CPU: 0 PID: 1309 at fs/f2fs/segment.c:2860 f2fs_inplace_write_data+0x232/0x240
[ 699.728670] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd mac_hid i2c_piix4 soundcore ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx raid1 raid0 multipath linear 8139too crct10dif_pclmul crc32_pclmul qxl drm_kms_helper syscopyarea aesni_intel sysfillrect sysimgblt fb_sys_fops ttm drm aes_x86_64 crypto_simd cryptd 8139cp glue_helper mii pata_acpi floppy
[ 699.729056] CPU: 0 PID: 1309 Comm: a.out Not tainted 4.18.0-rc1+ #4
[ 699.729064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 699.729074] RIP: 0010:f2fs_inplace_write_data+0x232/0x240
[ 699.729076] Code: ff e9 cf fe ff ff 49 8d 7d 10 e8 39 45 ad ff 4d 8b 7d 10 be 04 00 00 00 49 8d 7f 48 e8 07 49 ad ff 45 8b 7f 48 e9 fb fe ff ff <0f> 0b f0 41 80 4d 48 04 e9 65 fe ff ff 90 66 66 66 66 90 55 48 8d
[ 699.729130] RSP: 0018:ffff8801f43af568 EFLAGS: 00010202
[ 699.729139] RAX: 000000000000003f RBX: ffff8801f43af7b8 RCX: ffffffffb88c9113
[ 699.729142] RDX: 0000000000000003 RSI: dffffc0000000000 RDI: ffff8802024e5540
[ 699.729144] RBP: ffff8801f43af590 R08: 0000000000000009 R09: ffffffffffffffe8
[ 699.729147] R10: 0000000000000001 R11: ffffed0039b0596a R12: ffff8802024e5540
[ 699.729149] R13: ffff8801f0335500 R14: ffff8801e3e7a700 R15: ffff8801e1ee4450
[ 699.729154] FS: 00007f9bf97f5700(0000) GS:ffff8801f6e00000(0000) knlGS:0000000000000000
[ 699.729156] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 699.729159] CR2: 00007f9bf925d170 CR3: 00000001f0c34000 CR4: 00000000000006f0
[ 699.729171] Call Trace:
[ 699.729192] f2fs_do_write_data_page+0x2e2/0xe00
[ 699.729203] ? f2fs_should_update_outplace+0xd0/0xd0
[ 699.729238] ? memcg_drain_all_list_lrus+0x280/0x280
[ 699.729269] ? __radix_tree_replace+0xa3/0x120
[ 699.729276] __write_data_page+0x5c7/0xe30
[ 699.729291] ? kasan_check_read+0x11/0x20
[ 699.729310] ? page_mapped+0x8a/0x110
[ 699.729321] ? page_mkclean+0xe9/0x160
[ 699.729327] ? f2fs_do_write_data_page+0xe00/0xe00
[ 699.729331] ? invalid_page_referenced_vma+0x130/0x130
[ 699.729345] ? clear_page_dirty_for_io+0x332/0x450
[ 699.729351] f2fs_write_cache_pages+0x4ca/0x860
[ 699.729358] ? __write_data_page+0xe30/0xe30
[ 699.729374] ? percpu_counter_add_batch+0x22/0xa0
[ 699.729380] ? kasan_check_write+0x14/0x20
[ 699.729391] ? _raw_spin_lock+0x17/0x40
[ 699.729403] ? f2fs_mark_inode_dirty_sync.part.18+0x16/0x30
[ 699.729413] ? iov_iter_advance+0x113/0x640
[ 699.729418] ? f2fs_write_end+0x133/0x2e0
[ 699.729423] ? balance_dirty_pages_ratelimited+0x239/0x640
[ 699.729428] f2fs_write_data_pages+0x329/0x520
[ 699.729433] ? generic_perform_write+0x250/0x320
[ 699.729438] ? f2fs_write_cache_pages+0x860/0x860
[ 699.729454] ? current_time+0x110/0x110
[ 699.729459] ? f2fs_preallocate_blocks+0x1ef/0x370
[ 699.729464] do_writepages+0x37/0xb0
[ 699.729468] ? f2fs_write_cache_pages+0x860/0x860
[ 699.729472] ? do_writepages+0x37/0xb0
[ 699.729478] __filemap_fdatawrite_range+0x19a/0x1f0
[ 699.729483] ? delete_from_page_cache_batch+0x4e0/0x4e0
[ 699.729496] ? __vfs_write+0x2b2/0x410
[ 699.729501] file_write_and_wait_range+0x66/0xb0
[ 699.729506] f2fs_do_sync_file+0x1f9/0xd90
[ 699.729511] ? truncate_partial_data_page+0x290/0x290
[ 699.729521] ? __sb_end_write+0x30/0x50
[ 699.729526] ? vfs_write+0x20f/0x260
[ 699.729530] f2fs_sync_file+0x9a/0xb0
[ 699.729534] ? f2fs_do_sync_file+0xd90/0xd90
[ 699.729548] vfs_fsync_range+0x68/0x100
[ 699.729554] ? __fget_light+0xc9/0xe0
[ 699.729558] do_fsync+0x3d/0x70
[ 699.729562] __x64_sys_fdatasync+0x24/0x30
[ 699.729585] do_syscall_64+0x78/0x170
[ 699.729595] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 699.729613] RIP: 0033:0x7f9bf930d800
[ 699.729615] Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 49 bf 2c 00 00 75 10 b8 4b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 be 78 01 00 48 89 04 24
[ 699.729668] RSP: 002b:00007ffee3606c68 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
[ 699.729673] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9bf930d800
[ 699.729675] RDX: 0000000000008000 RSI: 00000000006010a0 RDI: 0000000000000003
[ 699.729678] RBP: 00007ffee3606ca0 R08: 0000000001503010 R09: 0000000000000000
[ 699.729680] R10: 00000000000002e8 R11: 0000000000000246 R12: 0000000000400610
[ 699.729683] R13: 00007ffee3606da0 R14: 0000000000000000 R15: 0000000000000000
[ 699.729687] ---[ end trace 4ce02f25ff7d3df5 ]---
[ 699.729782] ------------[ cut here ]------------
[ 699.729785] kernel BUG at fs/f2fs/segment.h:654!
[ 699.731055] invalid opcode: 0000 [#1 ] SMP KASAN PTI
[ 699.732104] CPU: 0 PID: 1309 Comm: a.out Tainted: G W 4.18.0-rc1+ #4
[ 699.733684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 699.735611] RIP: 0010:f2fs_submit_page_bio+0x29b/0x730
[ 699.736649] Code: 54 49 8d bd 18 04 00 00 e8 b2 59 af ff 41 8b 8d 18 04 00 00 8b 45 b8 41 d3 e6 44 01 f0 4c 8d 73 14 41 39 c7 0f 82 37 fe ff ff <0f> 0b 65 8b 05 2c 04 77 47 89 c0 48 0f a3 05 52 c1 d5 01 0f 92 c0
[ 699.740524] RSP: 0018:ffff8801f43af508 EFLAGS: 00010283
[ 699.741573] RAX: 0000000000000000 RBX: ffff8801f43af7b8 RCX: ffffffffb88a7cef
[ 699.743006] RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8801e3e7a64c
[ 699.744426] RBP: ffff8801f43af558 R08: ffffed003e066b55 R09: ffffed003e066b55
[ 699.745833] R10: 0000000000000001 R11: ffffed003e066b54 R12: ffffea0007876940
[ 699.747256] R13: ffff8801f0335500 R14: ffff8801e3e7a600 R15: 0000000000000001
[ 699.748683] FS: 00007f9bf97f5700(0000) GS:ffff8801f6e00000(0000) knlGS:0000000000000000
[ 699.750293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 699.751462] CR2: 00007f9bf925d170 CR3: 00000001f0c34000 CR4: 00000000000006f0
[ 699.752874] Call Trace:
[ 699.753386] ? f2fs_inplace_write_data+0x93/0x240
[ 699.754341] f2fs_inplace_write_data+0xd2/0x240
[ 699.755271] f2fs_do_write_data_page+0x2e2/0xe00
[ 699.756214] ? f2fs_should_update_outplace+0xd0/0xd0
[ 699.757215] ? memcg_drain_all_list_lrus+0x280/0x280
[ 699.758209] ? __radix_tree_replace+0xa3/0x120
[ 699.759164] __write_data_page+0x5c7/0xe30
[ 699.760002] ? kasan_check_read+0x11/0x20
[ 699.760823] ? page_mapped+0x8a/0x110
[ 699.761573] ? page_mkclean+0xe9/0x160
[ 699.762345] ? f2fs_do_write_data_page+0xe00/0xe00
[ 699.763332] ? invalid_page_referenced_vma+0x130/0x130
[ 699.764374] ? clear_page_dirty_for_io+0x332/0x450
[ 699.765347] f2fs_write_cache_pages+0x4ca/0x860
[ 699.766276] ? __write_data_page+0xe30/0xe30
[ 699.767161] ? percpu_counter_add_batch+0x22/0xa0
[ 699.768112] ? kasan_check_write+0x14/0x20
[ 699.768951] ? _raw_spin_lock+0x17/0x40
[ 699.769739] ? f2fs_mark_inode_dirty_sync.part.18+0x16/0x30
[ 699.770885] ? iov_iter_advance+0x113/0x640
[ 699.771743] ? f2fs_write_end+0x133/0x2e0
[ 699.772569] ? balance_dirty_pages_ratelimited+0x239/0x640
[ 699.773680] f2fs_write_data_pages+0x329/0x520
[ 699.774603] ? generic_perform_write+0x250/0x320
[ 699.775544] ? f2fs_write_cache_pages+0x860/0x860
[ 699.776510] ? current_time+0x110/0x110
[ 699.777299] ? f2fs_preallocate_blocks+0x1ef/0x370
[ 699.778279] do_writepages+0x37/0xb0
[ 699.779026] ? f2fs_write_cache_pages+0x860/0x860
[ 699.779978] ? do_writepages+0x37/0xb0
[ 699.780755] __filemap_fdatawrite_range+0x19a/0x1f0
[ 699.781746] ? delete_from_page_cache_batch+0x4e0/0x4e0
[ 699.782820] ? __vfs_write+0x2b2/0x410
[ 699.783597] file_write_and_wait_range+0x66/0xb0
[ 699.784540] f2fs_do_sync_file+0x1f9/0xd90
[ 699.785381] ? truncate_partial_data_page+0x290/0x290
[ 699.786415] ? __sb_end_write+0x30/0x50
[ 699.787204] ? vfs_write+0x20f/0x260
[ 699.787941] f2fs_sync_file+0x9a/0xb0
[ 699.788694] ? f2fs_do_sync_file+0xd90/0xd90
[ 699.789572] vfs_fsync_range+0x68/0x100
[ 699.790360] ? __fget_light+0xc9/0xe0
[ 699.791128] do_fsync+0x3d/0x70
[ 699.791779] __x64_sys_fdatasync+0x24/0x30
[ 699.792614] do_syscall_64+0x78/0x170
[ 699.793371] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 699.794406] RIP: 0033:0x7f9bf930d800
[ 699.795134] Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 49 bf 2c 00 00 75 10 b8 4b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 be 78 01 00 48 89 04 24
[ 699.798960] RSP: 002b:00007ffee3606c68 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
[ 699.800483] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9bf930d800
[ 699.801923] RDX: 0000000000008000 RSI: 00000000006010a0 RDI: 0000000000000003
[ 699.803373] RBP: 00007ffee3606ca0 R08: 0000000001503010 R09: 0000000000000000
[ 699.804798] R10: 00000000000002e8 R11: 0000000000000246 R12: 0000000000400610
[ 699.806233] R13: 00007ffee3606da0 R14: 0000000000000000 R15: 0000000000000000
[ 699.807667] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd mac_hid i2c_piix4 soundcore ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx raid1 raid0 multipath linear 8139too crct10dif_pclmul crc32_pclmul qxl drm_kms_helper syscopyarea aesni_intel sysfillrect sysimgblt fb_sys_fops ttm drm aes_x86_64 crypto_simd cryptd 8139cp glue_helper mii pata_acpi floppy
[ 699.817079] ---[ end trace 4ce02f25ff7d3df6 ]---
[ 699.818068] RIP: 0010:f2fs_submit_page_bio+0x29b/0x730
[ 699.819114] Code: 54 49 8d bd 18 04 00 00 e8 b2 59 af ff 41 8b 8d 18 04 00 00 8b 45 b8 41 d3 e6 44 01 f0 4c 8d 73 14 41 39 c7 0f 82 37 fe ff ff <0f> 0b 65 8b 05 2c 04 77 47 89 c0 48 0f a3 05 52 c1 d5 01 0f 92 c0
[ 699.822919] RSP: 0018:ffff8801f43af508 EFLAGS: 00010283
[ 699.823977] RAX: 0000000000000000 RBX: ffff8801f43af7b8 RCX: ffffffffb88a7cef
[ 699.825436] RDX: 0000000000000007 RSI: dffffc0000000000 RDI: ffff8801e3e7a64c
[ 699.826881] RBP: ffff8801f43af558 R08: ffffed003e066b55 R09: ffffed003e066b55
[ 699.828292] R10: 0000000000000001 R11: ffffed003e066b54 R12: ffffea0007876940
[ 699.829750] R13: ffff8801f0335500 R14: ffff8801e3e7a600 R15: 0000000000000001
[ 699.831192] FS: 00007f9bf97f5700(0000) GS:ffff8801f6e00000(0000) knlGS:0000000000000000
[ 699.832793] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 699.833981] CR2: 00007f9bf925d170 CR3: 00000001f0c34000 CR4: 00000000000006f0
[ 699.835556] ==================================================================
[ 699.837029] BUG: KASAN: stack-out-of-bounds in update_stack_state+0x38c/0x3e0
[ 699.838462] Read of size 8 at addr ffff8801f43af970 by task a.out/1309
[ 699.840086] CPU: 0 PID: 1309 Comm: a.out Tainted: G D W 4.18.0-rc1+ #4
[ 699.841603] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 699.843475] Call Trace:
[ 699.843982] dump_stack+0x7b/0xb5
[ 699.844661] print_address_description+0x70/0x290
[ 699.845607] kasan_report+0x291/0x390
[ 699.846351] ? update_stack_state+0x38c/0x3e0
[ 699.853831] __asan_load8+0x54/0x90
[ 699.854569] update_stack_state+0x38c/0x3e0
[ 699.855428] ? __read_once_size_nocheck.constprop.7+0x20/0x20
[ 699.856601] ? __save_stack_trace+0x5e/0x100
[ 699.857476] unwind_next_frame.part.5+0x18e/0x490
[ 699.858448] ? unwind_dump+0x290/0x290
[ 699.859217] ? clear_page_dirty_for_io+0x332/0x450
[ 699.860185] __unwind_start+0x106/0x190
[ 699.860974] __save_stack_trace+0x5e/0x100
[ 699.861808] ? __save_stack_trace+0x5e/0x100
[ 699.862691] ? unlink_anon_vmas+0xba/0x2c0
[ 699.863525] save_stack_trace+0x1f/0x30
[ 699.864312] save_stack+0x46/0xd0
[ 699.864993] ? __alloc_pages_slowpath+0x1420/0x1420
[ 699.865990] ? flush_tlb_mm_range+0x15e/0x220
[ 699.866889] ? kasan_check_write+0x14/0x20
[ 699.867724] ? __dec_node_state+0x92/0xb0
[ 699.868543] ? lock_page_memcg+0x85/0xf0
[ 699.869350] ? unlock_page_memcg+0x16/0x80
[ 699.870185] ? page_remove_rmap+0x198/0x520
[ 699.871048] ? mark_page_accessed+0x133/0x200
[ 699.871930] ? _cond_resched+0x1a/0x50
[ 699.872700] ? unmap_page_range+0xcd4/0xe50
[ 699.873551] ? rb_next+0x58/0x80
[ 699.874217] ? rb_next+0x58/0x80
[ 699.874895] __kasan_slab_free+0x13c/0x1a0
[ 699.875734] ? unlink_anon_vmas+0xba/0x2c0
[ 699.876563] kasan_slab_free+0xe/0x10
[ 699.877315] kmem_cache_free+0x89/0x1e0
[ 699.878095] unlink_anon_vmas+0xba/0x2c0
[ 699.878913] free_pgtables+0x101/0x1b0
[ 699.879677] exit_mmap+0x146/0x2a0
[ 699.880378] ? __ia32_sys_munmap+0x50/0x50
[ 699.881214] ? kasan_check_read+0x11/0x20
[ 699.882052] ? mm_update_next_owner+0x322/0x380
[ 699.882985] mmput+0x8b/0x1d0
[ 699.883602] do_exit+0x43a/0x1390
[ 699.884288] ? mm_update_next_owner+0x380/0x380
[ 699.885212] ? f2fs_sync_file+0x9a/0xb0
[ 699.885995] ? f2fs_do_sync_file+0xd90/0xd90
[ 699.886877] ? vfs_fsync_range+0x68/0x100
[ 699.887694] ? __fget_light+0xc9/0xe0
[ 699.888442] ? do_fsync+0x3d/0x70
[ 699.889118] ? __x64_sys_fdatasync+0x24/0x30
[ 699.889996] rewind_stack_do_exit+0x17/0x20
[ 699.890860] RIP: 0033:0x7f9bf930d800
[ 699.891585] Code: Bad RIP value.
[ 699.892268] RSP: 002b:00007ffee3606c68 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
[ 699.893781] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9bf930d800
[ 699.895220] RDX: 0000000000008000 RSI: 00000000006010a0 RDI: 0000000000000003
[ 699.896643] RBP: 00007ffee3606ca0 R08: 0000000001503010 R09: 0000000000000000
[ 699.898069] R10: 00000000000002e8 R11: 0000000000000246 R12: 0000000000400610
[ 699.899505] R13: 00007ffee3606da0 R14: 0000000000000000 R15: 0000000000000000
[ 699.901241] The buggy address belongs to the page:
[ 699.902215] page:ffffea0007d0ebc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
[ 699.903811] flags: 0x2ffff0000000000()
[ 699.904585] raw: 02ffff0000000000 0000000000000000 ffffffff07d00101 0000000000000000
[ 699.906125] raw: 0000000000000000 0000000000240000 00000000ffffffff 0000000000000000
[ 699.907673] page dumped because: kasan: bad access detected
[ 699.909108] Memory state around the buggy address:
[ 699.910077] ffff8801f43af800: 00 f1 f1 f1 f1 00 f4 f4 f4 f3 f3 f3 f3 00 00 00
[ 699.911528] ffff8801f43af880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 699.912953] >ffff8801f43af900: 00 00 00 00 00 00 00 00 f1 01 f4 f4 f4 f2 f2 f2
[ 699.914392] ^
[ 699.915758] ffff8801f43af980: f2 00 f4 f4 00 00 00 00 f2 00 00 00 00 00 00 00
[ 699.917193] ffff8801f43afa00: 00 00 00 00 00 00 00 00 00 f3 f3 f3 00 00 00 00
[ 699.918634] ==================================================================
- Location
https://elixir.bootlin.com/linux/v4.18-rc1/source/fs/f2fs/segment.h#L644
Reported-by Wen Xu <wen.xu@gatech.edu>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- CoW is not implemented so check f2fs_io_info::blk_addr instead of
f2fs_io_info::{old,new}_blkaddr
- Operation code is f2fs_io_info::rw instead of f2fs_io_info::op
- f2fs_stop_checkpoint() only takes one argument
- In f2fs_map_blocks(), validate dn.data_blkaddr instead of blkaddr
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
3bfe2049c2
f2fs: fix to do sanity check with reserved blkaddr of inline inode
...
commit 4dbe38dc386910c668c75ae616b99b823b59f3eb upstream.
As Wen Xu reported in bugzilla, after image was injected with random data
by fuzzing, inline inode would contain invalid reserved blkaddr, then
during inline conversion, we will encounter illegal memory accessing
reported by KASAN, the root cause of this is when writing out converted
inline page, we will use invalid reserved blkaddr to update sit bitmap,
result in accessing memory beyond sit bitmap boundary.
In order to fix this issue, let's do sanity check with reserved block
address of inline inode to avoid above condition.
https://bugzilla.kernel.org/show_bug.cgi?id=200179
[ 1428.846352] BUG: KASAN: use-after-free in update_sit_entry+0x80/0x7f0
[ 1428.846618] Read of size 4 at addr ffff880194483540 by task a.out/2741
[ 1428.846855] CPU: 0 PID: 2741 Comm: a.out Tainted: G W 4.17.0+ #1
[ 1428.846858] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 1428.846860] Call Trace:
[ 1428.846868] dump_stack+0x71/0xab
[ 1428.846875] print_address_description+0x6b/0x290
[ 1428.846881] kasan_report+0x28e/0x390
[ 1428.846888] ? update_sit_entry+0x80/0x7f0
[ 1428.846898] update_sit_entry+0x80/0x7f0
[ 1428.846906] f2fs_allocate_data_block+0x6db/0xc70
[ 1428.846914] ? f2fs_get_node_info+0x14f/0x590
[ 1428.846920] do_write_page+0xc8/0x150
[ 1428.846928] f2fs_outplace_write_data+0xfe/0x210
[ 1428.846935] ? f2fs_do_write_node_page+0x170/0x170
[ 1428.846941] ? radix_tree_tag_clear+0xff/0x130
[ 1428.846946] ? __mod_node_page_state+0x22/0xa0
[ 1428.846951] ? inc_zone_page_state+0x54/0x100
[ 1428.846956] ? __test_set_page_writeback+0x336/0x5d0
[ 1428.846964] f2fs_convert_inline_page+0x407/0x6d0
[ 1428.846971] ? f2fs_read_inline_data+0x3b0/0x3b0
[ 1428.846978] ? __get_node_page+0x335/0x6b0
[ 1428.846987] f2fs_convert_inline_inode+0x41b/0x500
[ 1428.846994] ? f2fs_convert_inline_page+0x6d0/0x6d0
[ 1428.847000] ? kasan_unpoison_shadow+0x31/0x40
[ 1428.847005] ? kasan_kmalloc+0xa6/0xd0
[ 1428.847024] f2fs_file_mmap+0x79/0xc0
[ 1428.847029] mmap_region+0x58b/0x880
[ 1428.847037] ? arch_get_unmapped_area+0x370/0x370
[ 1428.847042] do_mmap+0x55b/0x7a0
[ 1428.847048] vm_mmap_pgoff+0x16f/0x1c0
[ 1428.847055] ? vma_is_stack_for_current+0x50/0x50
[ 1428.847062] ? __fsnotify_update_child_dentry_flags.part.1+0x160/0x160
[ 1428.847068] ? do_sys_open+0x206/0x2a0
[ 1428.847073] ? __fget+0xb4/0x100
[ 1428.847079] ksys_mmap_pgoff+0x278/0x360
[ 1428.847085] ? find_mergeable_anon_vma+0x50/0x50
[ 1428.847091] do_syscall_64+0x73/0x160
[ 1428.847098] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 1428.847102] RIP: 0033:0x7fb1430766ba
[ 1428.847103] Code: 89 f5 41 54 49 89 fc 55 53 74 35 49 63 e8 48 63 da 4d 89 f9 49 89 e8 4d 63 d6 48 89 da 4c 89 ee 4c 89 e7 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 1f 00
[ 1428.847162] RSP: 002b:00007ffc651d9388 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
[ 1428.847167] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fb1430766ba
[ 1428.847170] RDX: 0000000000000001 RSI: 0000000000001000 RDI: 0000000000000000
[ 1428.847173] RBP: 0000000000000003 R08: 0000000000000003 R09: 0000000000000000
[ 1428.847176] R10: 0000000000008002 R11: 0000000000000246 R12: 0000000000000000
[ 1428.847179] R13: 0000000000001000 R14: 0000000000008002 R15: 0000000000000000
[ 1428.847252] Allocated by task 2683:
[ 1428.847372] kasan_kmalloc+0xa6/0xd0
[ 1428.847380] kmem_cache_alloc+0xc8/0x1e0
[ 1428.847385] getname_flags+0x73/0x2b0
[ 1428.847390] user_path_at_empty+0x1d/0x40
[ 1428.847395] vfs_statx+0xc1/0x150
[ 1428.847401] __do_sys_newlstat+0x7e/0xd0
[ 1428.847405] do_syscall_64+0x73/0x160
[ 1428.847411] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 1428.847466] Freed by task 2683:
[ 1428.847566] __kasan_slab_free+0x137/0x190
[ 1428.847571] kmem_cache_free+0x85/0x1e0
[ 1428.847575] filename_lookup+0x191/0x280
[ 1428.847580] vfs_statx+0xc1/0x150
[ 1428.847585] __do_sys_newlstat+0x7e/0xd0
[ 1428.847590] do_syscall_64+0x73/0x160
[ 1428.847596] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 1428.847648] The buggy address belongs to the object at ffff880194483300
which belongs to the cache names_cache of size 4096
[ 1428.847946] The buggy address is located 576 bytes inside of
4096-byte region [ffff880194483300, ffff880194484300)
[ 1428.848234] The buggy address belongs to the page:
[ 1428.848366] page:ffffea0006512000 count:1 mapcount:0 mapping:ffff8801f3586380 index:0x0 compound_mapcount: 0
[ 1428.848606] flags: 0x17fff8000008100(slab|head)
[ 1428.848737] raw: 017fff8000008100 dead000000000100 dead000000000200 ffff8801f3586380
[ 1428.848931] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
[ 1428.849122] page dumped because: kasan: bad access detected
[ 1428.849305] Memory state around the buggy address:
[ 1428.849436] ffff880194483400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 1428.849620] ffff880194483480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 1428.849804] >ffff880194483500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 1428.849985] ^
[ 1428.850120] ffff880194483580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 1428.850303] ffff880194483600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 1428.850498] ==================================================================
Reported-by: Wen Xu <wen.xu@gatech.edu>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
cbe5e5cd70
f2fs: fix to do sanity check with node footer and iblocks
...
commit e34438c903b653daca2b2a7de95aed46226f8ed3 upstream.
This patch adds to do sanity check with below fields of inode to
avoid reported panic.
- node footer
- iblocks
https://bugzilla.kernel.org/show_bug.cgi?id=200223
- Overview
BUG() triggered in f2fs_truncate_inode_blocks() when un-mounting a mounted f2fs image after writing to it
- Reproduce
- POC (poc.c)
static void activity(char *mpoint) {
char *foo_bar_baz;
int err;
static int buf[8192];
memset(buf, 0, sizeof(buf));
err = asprintf(&foo_bar_baz, "%s/foo/bar/baz", mpoint);
// open / write / read
int fd = open(foo_bar_baz, O_RDWR | O_TRUNC, 0777);
if (fd >= 0) {
write(fd, (char *)buf, 517);
write(fd, (char *)buf, sizeof(buf));
close(fd);
}
}
int main(int argc, char *argv[]) {
activity(argv[1]);
return 0;
}
- Kernel meesage
[ 552.479723] F2FS-fs (loop0): Mounted with checkpoint version = 2
[ 556.451891] ------------[ cut here ]------------
[ 556.451899] kernel BUG at fs/f2fs/node.c:987!
[ 556.452920] invalid opcode: 0000 [#1 ] SMP KASAN PTI
[ 556.453936] CPU: 1 PID: 1310 Comm: umount Not tainted 4.18.0-rc1+ #4
[ 556.455213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 556.457140] RIP: 0010:f2fs_truncate_inode_blocks+0x4a7/0x6f0
[ 556.458280] Code: e8 ae ea ff ff 41 89 c7 c1 e8 1f 84 c0 74 0a 41 83 ff fe 0f 85 35 ff ff ff 81 85 b0 fe ff ff fb 03 00 00 e9 f7 fd ff ff 0f 0b <0f> 0b e8 62 b7 9a 00 48 8b bd a0 fe ff ff e8 56 54 ae ff 48 8b b5
[ 556.462015] RSP: 0018:ffff8801f292f808 EFLAGS: 00010286
[ 556.463068] RAX: ffffed003e73242d RBX: ffff8801f292f958 RCX: ffffffffb88b81bc
[ 556.464479] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801f3992164
[ 556.465901] RBP: ffff8801f292f980 R08: ffffed003e73242d R09: ffffed003e73242d
[ 556.467311] R10: 0000000000000001 R11: ffffed003e73242c R12: 00000000fffffc64
[ 556.468706] R13: ffff8801f3992000 R14: 0000000000000058 R15: 00000000ffff8801
[ 556.470117] FS: 00007f8029297840(0000) GS:ffff8801f6f00000(0000) knlGS:0000000000000000
[ 556.471702] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 556.472838] CR2: 000055f5f57305d8 CR3: 00000001f18b0000 CR4: 00000000000006e0
[ 556.474265] Call Trace:
[ 556.474782] ? f2fs_alloc_nid_failed+0xf0/0xf0
[ 556.475686] ? truncate_nodes+0x980/0x980
[ 556.476516] ? pagecache_get_page+0x21f/0x2f0
[ 556.477412] ? __asan_loadN+0xf/0x20
[ 556.478153] ? __get_node_page+0x331/0x5b0
[ 556.478992] ? reweight_entity+0x1e6/0x3b0
[ 556.479826] f2fs_truncate_blocks+0x55e/0x740
[ 556.480709] ? f2fs_truncate_data_blocks+0x20/0x20
[ 556.481689] ? __radix_tree_lookup+0x34/0x160
[ 556.482630] ? radix_tree_lookup+0xd/0x10
[ 556.483445] f2fs_truncate+0xd4/0x1a0
[ 556.484206] f2fs_evict_inode+0x5ce/0x630
[ 556.485032] evict+0x16f/0x290
[ 556.485664] iput+0x280/0x300
[ 556.486300] dentry_unlink_inode+0x165/0x1e0
[ 556.487169] __dentry_kill+0x16a/0x260
[ 556.487936] dentry_kill+0x70/0x250
[ 556.488651] shrink_dentry_list+0x125/0x260
[ 556.489504] shrink_dcache_parent+0xc1/0x110
[ 556.490379] ? shrink_dcache_sb+0x200/0x200
[ 556.491231] ? bit_wait_timeout+0xc0/0xc0
[ 556.492047] do_one_tree+0x12/0x40
[ 556.492743] shrink_dcache_for_umount+0x3f/0xa0
[ 556.493656] generic_shutdown_super+0x43/0x1c0
[ 556.494561] kill_block_super+0x52/0x80
[ 556.495341] kill_f2fs_super+0x62/0x70
[ 556.496105] deactivate_locked_super+0x6f/0xa0
[ 556.497004] deactivate_super+0x5e/0x80
[ 556.497785] cleanup_mnt+0x61/0xa0
[ 556.498492] __cleanup_mnt+0x12/0x20
[ 556.499218] task_work_run+0xc8/0xf0
[ 556.499949] exit_to_usermode_loop+0x125/0x130
[ 556.500846] do_syscall_64+0x138/0x170
[ 556.501609] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 556.502659] RIP: 0033:0x7f8028b77487
[ 556.503384] Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 c9 2b 00 f7 d8 64 89 01 48
[ 556.507137] RSP: 002b:00007fff9f2e3598 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 556.508637] RAX: 0000000000000000 RBX: 0000000000ebd030 RCX: 00007f8028b77487
[ 556.510069] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000ec41e0
[ 556.511481] RBP: 0000000000ec41e0 R08: 0000000000000000 R09: 0000000000000014
[ 556.512892] R10: 00000000000006b2 R11: 0000000000000246 R12: 00007f802908083c
[ 556.514320] R13: 0000000000000000 R14: 0000000000ebd210 R15: 00007fff9f2e3820
[ 556.515745] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd mac_hid i2c_piix4 soundcore ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx raid1 raid0 multipath linear 8139too crct10dif_pclmul crc32_pclmul qxl drm_kms_helper syscopyarea aesni_intel sysfillrect sysimgblt fb_sys_fops ttm drm aes_x86_64 crypto_simd cryptd 8139cp glue_helper mii pata_acpi floppy
[ 556.529276] ---[ end trace 4ce02f25ff7d3df5 ]---
[ 556.530340] RIP: 0010:f2fs_truncate_inode_blocks+0x4a7/0x6f0
[ 556.531513] Code: e8 ae ea ff ff 41 89 c7 c1 e8 1f 84 c0 74 0a 41 83 ff fe 0f 85 35 ff ff ff 81 85 b0 fe ff ff fb 03 00 00 e9 f7 fd ff ff 0f 0b <0f> 0b e8 62 b7 9a 00 48 8b bd a0 fe ff ff e8 56 54 ae ff 48 8b b5
[ 556.535330] RSP: 0018:ffff8801f292f808 EFLAGS: 00010286
[ 556.536395] RAX: ffffed003e73242d RBX: ffff8801f292f958 RCX: ffffffffb88b81bc
[ 556.537824] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8801f3992164
[ 556.539290] RBP: ffff8801f292f980 R08: ffffed003e73242d R09: ffffed003e73242d
[ 556.540709] R10: 0000000000000001 R11: ffffed003e73242c R12: 00000000fffffc64
[ 556.542131] R13: ffff8801f3992000 R14: 0000000000000058 R15: 00000000ffff8801
[ 556.543579] FS: 00007f8029297840(0000) GS:ffff8801f6f00000(0000) knlGS:0000000000000000
[ 556.545180] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 556.546338] CR2: 000055f5f57305d8 CR3: 00000001f18b0000 CR4: 00000000000006e0
[ 556.547809] ==================================================================
[ 556.549248] BUG: KASAN: stack-out-of-bounds in arch_tlb_gather_mmu+0x52/0x170
[ 556.550672] Write of size 8 at addr ffff8801f292fd10 by task umount/1310
[ 556.552338] CPU: 1 PID: 1310 Comm: umount Tainted: G D 4.18.0-rc1+ #4
[ 556.553886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 556.555756] Call Trace:
[ 556.556264] dump_stack+0x7b/0xb5
[ 556.556944] print_address_description+0x70/0x290
[ 556.557903] kasan_report+0x291/0x390
[ 556.558649] ? arch_tlb_gather_mmu+0x52/0x170
[ 556.559537] __asan_store8+0x57/0x90
[ 556.560268] arch_tlb_gather_mmu+0x52/0x170
[ 556.561110] tlb_gather_mmu+0x12/0x40
[ 556.561862] exit_mmap+0x123/0x2a0
[ 556.562555] ? __ia32_sys_munmap+0x50/0x50
[ 556.563384] ? exit_aio+0x98/0x230
[ 556.564079] ? __x32_compat_sys_io_submit+0x260/0x260
[ 556.565099] ? taskstats_exit+0x1f4/0x640
[ 556.565925] ? kasan_check_read+0x11/0x20
[ 556.566739] ? mm_update_next_owner+0x322/0x380
[ 556.567652] mmput+0x8b/0x1d0
[ 556.568260] do_exit+0x43a/0x1390
[ 556.568937] ? mm_update_next_owner+0x380/0x380
[ 556.569855] ? deactivate_super+0x5e/0x80
[ 556.570668] ? cleanup_mnt+0x61/0xa0
[ 556.571395] ? __cleanup_mnt+0x12/0x20
[ 556.572156] ? task_work_run+0xc8/0xf0
[ 556.572917] ? exit_to_usermode_loop+0x125/0x130
[ 556.573861] rewind_stack_do_exit+0x17/0x20
[ 556.574707] RIP: 0033:0x7f8028b77487
[ 556.575428] Code: Bad RIP value.
[ 556.576106] RSP: 002b:00007fff9f2e3598 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 556.577599] RAX: 0000000000000000 RBX: 0000000000ebd030 RCX: 00007f8028b77487
[ 556.579020] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000ec41e0
[ 556.580422] RBP: 0000000000ec41e0 R08: 0000000000000000 R09: 0000000000000014
[ 556.581833] R10: 00000000000006b2 R11: 0000000000000246 R12: 00007f802908083c
[ 556.583252] R13: 0000000000000000 R14: 0000000000ebd210 R15: 00007fff9f2e3820
[ 556.584983] The buggy address belongs to the page:
[ 556.585961] page:ffffea0007ca4bc0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
[ 556.587540] flags: 0x2ffff0000000000()
[ 556.588296] raw: 02ffff0000000000 0000000000000000 dead000000000200 0000000000000000
[ 556.589822] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 556.591359] page dumped because: kasan: bad access detected
[ 556.592786] Memory state around the buggy address:
[ 556.593753] ffff8801f292fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 556.595191] ffff8801f292fc80: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00
[ 556.596613] >ffff8801f292fd00: 00 00 f3 00 00 00 00 f3 f3 00 00 00 00 f4 f4 f4
[ 556.598044] ^
[ 556.598797] ffff8801f292fd80: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
[ 556.600225] ffff8801f292fe00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f4 f4 f4
[ 556.601647] ==================================================================
- Location
https://elixir.bootlin.com/linux/v4.18-rc1/source/fs/f2fs/node.c#L987
case NODE_DIND_BLOCK:
err = truncate_nodes(&dn, nofs, offset[1], 3);
cont = 0;
break;
default:
BUG(); <---
}
Reported-by Wen Xu <wen.xu@gatech.edu>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Ben Hutchings
24f8bb8945
f2fs: Add sanity_check_inode() function
...
This was done as part of commits 5d64600d4f33 "f2fs: avoid bug_on on
corrupted inode" and 76d56d4ab4f2 "f2fs: fix to do sanity check with
extra_attr feature" upstream, but the specific checks they added are
not applicable to 4.4.
Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
b31ccde086
f2fs: fix to do sanity check with user_block_count
...
commit 9dc956b2c8523aed39d1e6508438be9fea28c8fc upstream.
This patch fixs to do sanity check with user_block_count.
- Overview
Divide zero in utilization when mount() a corrupted f2fs image
- Reproduce (4.18 upstream kernel)
- Kernel message
[ 564.099503] F2FS-fs (loop0): invalid crc value
[ 564.101991] divide error: 0000 [#1 ] SMP KASAN PTI
[ 564.103103] CPU: 1 PID: 1298 Comm: f2fs_discard-7: Not tainted 4.18.0-rc1+ #4
[ 564.104584] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 564.106624] RIP: 0010:issue_discard_thread+0x248/0x5c0
[ 564.107692] Code: ff ff 48 8b bd e8 fe ff ff 41 8b 9d 4c 04 00 00 e8 cd b8 ad ff 41 8b 85 50 04 00 00 31 d2 48 8d 04 80 48 8d 04 80 48 c1 e0 02 <48> f7 f3 83 f8 50 7e 16 41 c7 86 7c ff ff ff 01 00 00 00 41 c7 86
[ 564.111686] RSP: 0018:ffff8801f3117dc0 EFLAGS: 00010206
[ 564.112775] RAX: 0000000000000384 RBX: 0000000000000000 RCX: ffffffffb88c1e03
[ 564.114250] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff8801e3aa4850
[ 564.115706] RBP: ffff8801f3117f00 R08: 1ffffffff751a1d0 R09: fffffbfff751a1d0
[ 564.117177] R10: 0000000000000001 R11: fffffbfff751a1d0 R12: 00000000fffffffc
[ 564.118634] R13: ffff8801e3aa4400 R14: ffff8801f3117ed8 R15: ffff8801e2050000
[ 564.120094] FS: 0000000000000000(0000) GS:ffff8801f6f00000(0000) knlGS:0000000000000000
[ 564.121748] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 564.122923] CR2: 000000000202b078 CR3: 00000001f11ac000 CR4: 00000000000006e0
[ 564.124383] Call Trace:
[ 564.124924] ? __issue_discard_cmd+0x480/0x480
[ 564.125882] ? __sched_text_start+0x8/0x8
[ 564.126756] ? __kthread_parkme+0xcb/0x100
[ 564.127620] ? kthread_blkcg+0x70/0x70
[ 564.128412] kthread+0x180/0x1d0
[ 564.129105] ? __issue_discard_cmd+0x480/0x480
[ 564.130029] ? kthread_associate_blkcg+0x150/0x150
[ 564.131033] ret_from_fork+0x35/0x40
[ 564.131794] Modules linked in: snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd mac_hid i2c_piix4 soundcore ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx raid1 raid0 multipath linear 8139too crct10dif_pclmul crc32_pclmul qxl drm_kms_helper syscopyarea aesni_intel sysfillrect sysimgblt fb_sys_fops ttm drm aes_x86_64 crypto_simd cryptd 8139cp glue_helper mii pata_acpi floppy
[ 564.141798] ---[ end trace 4ce02f25ff7d3df5 ]---
[ 564.142773] RIP: 0010:issue_discard_thread+0x248/0x5c0
[ 564.143885] Code: ff ff 48 8b bd e8 fe ff ff 41 8b 9d 4c 04 00 00 e8 cd b8 ad ff 41 8b 85 50 04 00 00 31 d2 48 8d 04 80 48 8d 04 80 48 c1 e0 02 <48> f7 f3 83 f8 50 7e 16 41 c7 86 7c ff ff ff 01 00 00 00 41 c7 86
[ 564.147776] RSP: 0018:ffff8801f3117dc0 EFLAGS: 00010206
[ 564.148856] RAX: 0000000000000384 RBX: 0000000000000000 RCX: ffffffffb88c1e03
[ 564.150424] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff8801e3aa4850
[ 564.151906] RBP: ffff8801f3117f00 R08: 1ffffffff751a1d0 R09: fffffbfff751a1d0
[ 564.153463] R10: 0000000000000001 R11: fffffbfff751a1d0 R12: 00000000fffffffc
[ 564.154915] R13: ffff8801e3aa4400 R14: ffff8801f3117ed8 R15: ffff8801e2050000
[ 564.156405] FS: 0000000000000000(0000) GS:ffff8801f6f00000(0000) knlGS:0000000000000000
[ 564.158070] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 564.159279] CR2: 000000000202b078 CR3: 00000001f11ac000 CR4: 00000000000006e0
[ 564.161043] ==================================================================
[ 564.162587] BUG: KASAN: stack-out-of-bounds in from_kuid_munged+0x1d/0x50
[ 564.163994] Read of size 4 at addr ffff8801f3117c84 by task f2fs_discard-7:/1298
[ 564.165852] CPU: 1 PID: 1298 Comm: f2fs_discard-7: Tainted: G D 4.18.0-rc1+ #4
[ 564.167593] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 564.169522] Call Trace:
[ 564.170057] dump_stack+0x7b/0xb5
[ 564.170778] print_address_description+0x70/0x290
[ 564.171765] kasan_report+0x291/0x390
[ 564.172540] ? from_kuid_munged+0x1d/0x50
[ 564.173408] __asan_load4+0x78/0x80
[ 564.174148] from_kuid_munged+0x1d/0x50
[ 564.174962] do_notify_parent+0x1f5/0x4f0
[ 564.175808] ? send_sigqueue+0x390/0x390
[ 564.176639] ? css_set_move_task+0x152/0x340
[ 564.184197] do_exit+0x1290/0x1390
[ 564.184950] ? __issue_discard_cmd+0x480/0x480
[ 564.185884] ? mm_update_next_owner+0x380/0x380
[ 564.186829] ? __sched_text_start+0x8/0x8
[ 564.187672] ? __kthread_parkme+0xcb/0x100
[ 564.188528] ? kthread_blkcg+0x70/0x70
[ 564.189333] ? kthread+0x180/0x1d0
[ 564.190052] ? __issue_discard_cmd+0x480/0x480
[ 564.190983] rewind_stack_do_exit+0x17/0x20
[ 564.192190] The buggy address belongs to the page:
[ 564.193213] page:ffffea0007cc45c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0
[ 564.194856] flags: 0x2ffff0000000000()
[ 564.195644] raw: 02ffff0000000000 0000000000000000 dead000000000200 0000000000000000
[ 564.197247] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 564.198826] page dumped because: kasan: bad access detected
[ 564.200299] Memory state around the buggy address:
[ 564.201306] ffff8801f3117b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 564.202779] ffff8801f3117c00: 00 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3 f3
[ 564.204252] >ffff8801f3117c80: f3 f3 f3 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
[ 564.205742] ^
[ 564.206424] ffff8801f3117d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 564.207908] ffff8801f3117d80: f3 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
[ 564.209389] ==================================================================
[ 564.231795] F2FS-fs (loop0): Mounted with checkpoint version = 2
- Location
https://elixir.bootlin.com/linux/v4.18-rc1/source/fs/f2fs/segment.h#L586
return div_u64((u64)valid_user_blocks(sbi) * 100,
sbi->user_block_count);
Missing checks on sbi->user_block_count.
Reported-by: Wen Xu <wen.xu@gatech.edu>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
056120a8c1
f2fs: fix to do sanity check with secs_per_zone
...
commit 42bf546c1fe3f3654bdf914e977acbc2b80a5be5 upstream.
As Wen Xu reported in below link:
https://bugzilla.kernel.org/show_bug.cgi?id=200183
- Overview
Divide zero in reset_curseg() when mounting a crafted f2fs image
- Reproduce
- Kernel message
[ 588.281510] divide error: 0000 [#1 ] SMP KASAN PTI
[ 588.282701] CPU: 0 PID: 1293 Comm: mount Not tainted 4.18.0-rc1+ #4
[ 588.284000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[ 588.286178] RIP: 0010:reset_curseg+0x94/0x1a0
[ 588.298166] RSP: 0018:ffff8801e88d7940 EFLAGS: 00010246
[ 588.299360] RAX: 0000000000000014 RBX: ffff8801e1d46d00 RCX: ffffffffb88bf60b
[ 588.300809] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff8801e1d46d64
[ 588.305272] R13: 0000000000000000 R14: 0000000000000014 R15: 0000000000000000
[ 588.306822] FS: 00007fad85008840(0000) GS:ffff8801f6e00000(0000) knlGS:0000000000000000
[ 588.308456] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 588.309623] CR2: 0000000001705078 CR3: 00000001f30f8000 CR4: 00000000000006f0
[ 588.311085] Call Trace:
[ 588.311637] f2fs_build_segment_manager+0x103f/0x3410
[ 588.316136] ? f2fs_commit_super+0x1b0/0x1b0
[ 588.317031] ? set_blocksize+0x90/0x140
[ 588.319473] f2fs_mount+0x15/0x20
[ 588.320166] mount_fs+0x60/0x1a0
[ 588.320847] ? alloc_vfsmnt+0x309/0x360
[ 588.321647] vfs_kern_mount+0x6b/0x1a0
[ 588.322432] do_mount+0x34a/0x18c0
[ 588.323175] ? strndup_user+0x46/0x70
[ 588.323937] ? copy_mount_string+0x20/0x20
[ 588.324793] ? memcg_kmem_put_cache+0x1b/0xa0
[ 588.325702] ? kasan_check_write+0x14/0x20
[ 588.326562] ? _copy_from_user+0x6a/0x90
[ 588.327375] ? memdup_user+0x42/0x60
[ 588.328118] ksys_mount+0x83/0xd0
[ 588.328808] __x64_sys_mount+0x67/0x80
[ 588.329607] do_syscall_64+0x78/0x170
[ 588.330400] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 588.331461] RIP: 0033:0x7fad848e8b9a
[ 588.336022] RSP: 002b:00007ffd7c5b6be8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
[ 588.337547] RAX: ffffffffffffffda RBX: 00000000016f8030 RCX: 00007fad848e8b9a
[ 588.338999] RDX: 00000000016f8210 RSI: 00000000016f9f30 RDI: 0000000001700ec0
[ 588.340442] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000013
[ 588.341887] R10: 00000000c0ed0000 R11: 0000000000000206 R12: 0000000001700ec0
[ 588.343341] R13: 00000000016f8210 R14: 0000000000000000 R15: 0000000000000003
[ 588.354891] ---[ end trace 4ce02f25ff7d3df5 ]---
[ 588.355862] RIP: 0010:reset_curseg+0x94/0x1a0
[ 588.360742] RSP: 0018:ffff8801e88d7940 EFLAGS: 00010246
[ 588.361812] RAX: 0000000000000014 RBX: ffff8801e1d46d00 RCX: ffffffffb88bf60b
[ 588.363485] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff8801e1d46d64
[ 588.365213] RBP: ffff8801e88d7968 R08: ffffed003c32266f R09: ffffed003c32266f
[ 588.366661] R10: 0000000000000001 R11: ffffed003c32266e R12: ffff8801f0337700
[ 588.368110] R13: 0000000000000000 R14: 0000000000000014 R15: 0000000000000000
[ 588.370057] FS: 00007fad85008840(0000) GS:ffff8801f6e00000(0000) knlGS:0000000000000000
[ 588.372099] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 588.373291] CR2: 0000000001705078 CR3: 00000001f30f8000 CR4: 00000000000006f0
- Location
https://elixir.bootlin.com/linux/latest/source/fs/f2fs/segment.c#L2147
curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno);
If secs_per_zone is corrupted due to fuzzing test, it will cause divide
zero operation when using GET_ZONE_FROM_SEG macro, so we should do more
sanity check with secs_per_zone during mount to avoid this issue.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
5b0e78cc5c
f2fs: introduce and spread verify_blkaddr
...
commit e1da7872f6eda977bd812346bf588c35e4495a1e upstream.
This patch introduces verify_blkaddr to check meta/data block address
with valid range to detect bug earlier.
In addition, once we encounter an invalid blkaddr, notice user to run
fsck to fix, and let the kernel panic.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- I skipped an earlier renaming of is_valid_meta_blkaddr() to
f2fs_is_valid_meta_blkaddr()
- Drop inapplicable change to check on f2fs_fio_info::old_blkaddr
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:48 +01:00
Chao Yu
89e13ff3ba
f2fs: clean up with is_valid_blkaddr()
...
commit 7b525dd01365c6764018e374d391c92466be1b7a upstream.
- rename is_valid_blkaddr() to is_valid_meta_blkaddr() for readability.
- introduce is_valid_blkaddr() for cleanup.
No logic change in this patch.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- Drop inapplicable change to check on f2fs_fio_info::old_blkaddr
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Jaegeuk Kim
812bc5b6d6
f2fs: enhance sanity_check_raw_super() to avoid potential overflow
...
commit 0cfe75c5b011994651a4ca6d74f20aa997bfc69a upstream.
In order to avoid the below overflow issue, we should have checked the
boundaries in superblock before reaching out to allocation. As Linus suggested,
the right place should be sanity_check_raw_super().
Dr Silvio Cesare of InfoSect reported:
There are integer overflows with using the cp_payload superblock field in the
f2fs filesystem potentially leading to memory corruption.
include/linux/f2fs_fs.h
struct f2fs_super_block {
...
__le32 cp_payload;
fs/f2fs/f2fs.h
typedef u32 block_t; /*
* should not change u32, since it is the on-disk block
* address format, __le32.
*/
...
static inline block_t __cp_payload(struct f2fs_sb_info *sbi)
{
return le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload);
}
fs/f2fs/checkpoint.c
block_t start_blk, orphan_blocks, i, j;
...
start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
+++ integer overflows
...
unsigned int cp_blks = 1 + __cp_payload(sbi);
...
sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
+++ integer overflow leading to incorrect heap allocation.
int cp_payload_blks = __cp_payload(sbi);
...
ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
orphan_blocks);
+++ sign bug and integer overflow
...
for (i = 1; i < 1 + cp_payload_blks; i++)
+++ integer overflow
...
sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
NR_CURSEG_TYPE - __cp_payload(sbi)) *
F2FS_ORPHANS_PER_BLOCK;
+++ integer overflow
Reported-by: Greg KH <greg@kroah.com>
Reported-by: Silvio Cesare <silvio.cesare@gmail.com>
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- No hot file extension support
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Jaegeuk Kim
4e262aeed7
f2fs: sanity check on sit entry
...
commit b2ca374f33bd33fd822eb871876e4888cf79dc97 upstream.
syzbot hit the following crash on upstream commit
87ef12027b9b1dd0e0b12cf311fbcb19f9d92539 (Wed Apr 18 19:48:17 2018 +0000)
Merge tag 'ceph-for-4.17-rc2' of git://github.com/ceph/ceph-client
syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=83699adeb2d13579c31e
C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5805208181407744
syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=6005073343676416
Raw console output: https://syzkaller.appspot.com/x/log.txt?id=6555047731134464
Kernel config: https://syzkaller.appspot.com/x/.config?id=1808800213120130118
compiler: gcc (GCC) 8.0.1 20180413 (experimental)
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+83699adeb2d13579c31e@syzkaller.appspotmail.com
It will help syzbot understand when the bug is fixed. See footer for details.
If you forward the report, please keep this part and the footer.
F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0)
F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop0): invalid crc value
BUG: unable to handle kernel paging request at ffffed006b2a50c0
PGD 21ffee067 P4D 21ffee067 PUD 21fbeb067 PMD 0
Oops: 0000 [#1 ] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4514 Comm: syzkaller989480 Not tainted 4.17.0-rc1+ #8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:build_sit_entries fs/f2fs/segment.c:3653 [inline]
RIP: 0010:build_segment_manager+0x7ef7/0xbf70 fs/f2fs/segment.c:3852
RSP: 0018:ffff8801b102e5b0 EFLAGS: 00010a06
RAX: 1ffff1006b2a50c0 RBX: 0000000000000004 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801ac74243e
RBP: ffff8801b102f410 R08: ffff8801acbd46c0 R09: fffffbfff14d9af8
R10: fffffbfff14d9af8 R11: ffff8801acbd46c0 R12: ffff8801ac742a80
R13: ffff8801d9519100 R14: dffffc0000000000 R15: ffff880359528600
FS: 0000000001e04880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed006b2a50c0 CR3: 00000001ac6ac000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
f2fs_fill_super+0x4095/0x7bf0 fs/f2fs/super.c:2803
mount_bdev+0x30c/0x3e0 fs/super.c:1165
f2fs_mount+0x34/0x40 fs/f2fs/super.c:3020
mount_fs+0xae/0x328 fs/super.c:1268
vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037
vfs_kern_mount fs/namespace.c:1027 [inline]
do_new_mount fs/namespace.c:2517 [inline]
do_mount+0x564/0x3070 fs/namespace.c:2847
ksys_mount+0x12d/0x140 fs/namespace.c:3063
__do_sys_mount fs/namespace.c:3077 [inline]
__se_sys_mount fs/namespace.c:3074 [inline]
__x64_sys_mount+0xbe/0x150 fs/namespace.c:3074
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x443d6a
RSP: 002b:00007ffd312813c8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000c00 RCX: 0000000000443d6a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffd312813d0
RBP: 0000000000000003 R08: 0000000020016a00 R09: 000000000000000a
R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000004
R13: 0000000000402c60 R14: 0000000000000000 R15: 0000000000000000
RIP: build_sit_entries fs/f2fs/segment.c:3653 [inline] RSP: ffff8801b102e5b0
RIP: build_segment_manager+0x7ef7/0xbf70 fs/f2fs/segment.c:3852 RSP: ffff8801b102e5b0
CR2: ffffed006b2a50c0
---[ end trace a2034989e196ff17 ]---
Reported-and-tested-by: syzbot+83699adeb2d13579c31e@syzkaller.appspotmail.com
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Yunlei He
d5516450d2
f2fs: check blkaddr more accuratly before issue a bio
...
commit 0833721ec3658a4e9d5e58b6fa82cf9edc431e59 upstream.
This patch check blkaddr more accuratly before issue a
write or read bio.
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- CoW is not implemented so check f2fs_io_info::blk_addr instead of
f2fs_io_info::{old,new}_blkaddr
- Operation code is f2fs_io_info::rw instead of f2fs_io_info::op
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Jaegeuk Kim
f666f11a26
f2fs: return error during fill_super
...
commit c39a1b348c4fe172729eff77c533dabc3c7cdaa7 upstream.
Let's avoid BUG_ON during fill_super, when on-disk was totall corrupted.
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Chao Yu
a4f4f97573
f2fs: fix race condition in between free nid allocator/initializer
...
commit 30a61ddf8117c26ac5b295e1233eaa9629a94ca3 upstream.
In below concurrent case, allocated nid can be loaded into free nid cache
and be allocated again.
Thread A Thread B
- f2fs_create
- f2fs_new_inode
- alloc_nid
- __insert_nid_to_list(ALLOC_NID_LIST)
- f2fs_balance_fs_bg
- build_free_nids
- __build_free_nids
- scan_nat_page
- add_free_nid
- __lookup_nat_cache
- f2fs_add_link
- init_inode_metadata
- new_inode_page
- new_node_page
- set_node_addr
- alloc_nid_done
- __remove_nid_from_list(ALLOC_NID_LIST)
- __insert_nid_to_list(FREE_NID_LIST)
This patch makes nat cache lookup and free nid list operation being atomical
to avoid this race condition.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- add_free_nid() returns 0 in case of any error (except low memory)
- Tree/list addition has not been moved into __insert_nid_to_list()]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Jaegeuk Kim
db0e91e3fe
f2fs: free meta pages if sanity check for ckpt is failed
...
commit a2125ff7dd1ed3a2a53cdc1f8f9c9cec9cfaa7ab upstream.
This fixes missing freeing meta pages in the error case.
Tested-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Jaegeuk Kim
b37804d039
f2fs: detect wrong layout
...
commit 2040fce83fe17763b07c97c1f691da2bb85e4135 upstream.
Previous mkfs.f2fs allows small partition inappropriately, so f2fs should detect
that as well.
Refer this in f2fs-tools.
mkfs.f2fs: detect small partition by overprovision ratio and # of segments
Reported-and-Tested-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Jaegeuk Kim
e465e93d88
f2fs: fix to determine start_cp_addr by sbi->cur_cp_pack
...
commit 8508e44ae98622f841f5ef29d0bf3d5db4e0c1cc upstream.
We don't guarantee cp_addr is fixed by cp_version.
This is to sync with f2fs-tools.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4: adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Jaegeuk Kim
9213c2b511
f2fs: put directory inodes before checkpoint in roll-forward recovery
...
commit 9e1e6df412a28cdbbd2909de5c6189eda4a3383d upstream.
Before checkpoint, we'd be better drop any inodes.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:47 +01:00
Tiezhu Yang
2f958b8e22
f2fs: introduce get_checkpoint_version for cleanup
...
commit fc0065adb202518e25fb929cda7d5887a456f774 upstream.
There exists almost same codes when get the value of pre_version
and cur_version in function validate_checkpoint, this patch adds
get_checkpoint_version to clean up redundant codes.
Signed-off-by: Tiezhu Yang <kernelpatch@126.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4: f2fs_crc_valid() doesn't take an f2fs_sb_info pointer]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:46 +01:00
Jaegeuk Kim
65b9d5326d
f2fs: use crc and cp version to determine roll-forward recovery
...
commit a468f0ef516fda9c7d91bb550d458e853d76955e upstream.
Previously, we used cp_version only to detect recoverable dnodes.
In order to avoid same garbage cp_version, we needed to truncate the next
dnode during checkpoint, resulting in additional discard or data write.
If we can distinguish this by using crc in addition to cp_version, we can
remove this overhead.
There is backward compatibility concern where it changes node_footer layout.
So, this patch introduces a new checkpoint flag, CP_CRC_RECOVERY_FLAG, to
detect new layout. New layout will be activated only when this flag is set.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- Deleted code is slightly different
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:46 +01:00
Chao Yu
5dfb9eb6ca
f2fs: avoid unneeded loop in build_sit_entries
...
commit d600af236da51d9e3b90d21a23f95b820bd02e2f upstream.
When building each sit entry in cache, firstly, we will load it from
sit page, and then check all entries in sit journal, if there is one
updated entry in journal, cover cached entry with the journaled one.
Actually, most of check operation is unneeded since we only need
to update cached entries with journaled entries in batch, so
changing the flow as below for more efficient:
1. load all sit entries into cache from sit pages;
2. update sit entries with journal.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- Keep using curseg->curseg_mutex for serialisation
- Use sum instead of journal
- Don't add f2fs_discard_en() condition]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:46 +01:00
Yunlei He
6ef26eb155
f2fs: not allow to write illegal blkaddr
...
commit bb413d6acd4e1c361daebf8486efc3923f429792 upstream.
we came across an error as below:
[build_nat_area_bitmap:1710] nid[0x 1718] addr[0x 1c18ddc] ino[0x 1718]
[build_nat_area_bitmap:1710] nid[0x 1719] addr[0x 1c193d5] ino[0x 1719]
[build_nat_area_bitmap:1710] nid[0x 171a] addr[0x 1c1736e] ino[0x 171a]
[build_nat_area_bitmap:1710] nid[0x 171b] addr[0x 58b3ee8f] ino[0x815f92ed]
[build_nat_area_bitmap:1710] nid[0x 171c] addr[0x fcdc94b] ino[0x49366377]
[build_nat_area_bitmap:1710] nid[0x 171d] addr[0x 7cd2facf] ino[0xb3c55300]
[build_nat_area_bitmap:1710] nid[0x 171e] addr[0x bd4e25d0] ino[0x77c34c09]
... ...
[build_nat_area_bitmap:1710] nid[0x 1718] addr[0x 1c18ddc] ino[0x 1718]
[build_nat_area_bitmap:1710] nid[0x 1719] addr[0x 1c193d5] ino[0x 1719]
[build_nat_area_bitmap:1710] nid[0x 171a] addr[0x 1c1736e] ino[0x 171a]
[build_nat_area_bitmap:1710] nid[0x 171b] addr[0x 58b3ee8f] ino[0x815f92ed]
[build_nat_area_bitmap:1710] nid[0x 171c] addr[0x fcdc94b] ino[0x49366377]
[build_nat_area_bitmap:1710] nid[0x 171d] addr[0x 7cd2facf] ino[0xb3c55300]
[build_nat_area_bitmap:1710] nid[0x 171e] addr[0x bd4e25d0] ino[0x77c34c09]
One nat block may be stepped by a data block, so this patch forbid to
write if the blkaddr is illegal
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:46 +01:00
Chao Yu
70c357851b
f2fs: fix to avoid reading out encrypted data in page cache
...
commit 78682f79447998369a85f12b6437fa8fdbbdca50 upstream.
For encrypted inode, if user overwrites data of the inode, f2fs will read
encrypted data into page cache, and then do the decryption.
However reader can race with overwriter, and it will see encrypted data
which has not been decrypted by overwriter yet. Fix it by moving decrypting
work to background and keep page non-uptodated until data is decrypted.
Thread A Thread B
- f2fs_file_write_iter
- __generic_file_write_iter
- generic_perform_write
- f2fs_write_begin
- f2fs_submit_page_bio
- generic_file_read_iter
- do_generic_file_read
- lock_page_killable
- unlock_page
- copy_page_to_iter
hit the encrypted data in updated page
- lock_page
- fscrypt_decrypt_page
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- Keep using f2fs_crypto functions instead of generic fscrypt API
- Use PAGE_CACHE_SIZE instead of PAGE_SIZE
- Use submit_bio() instead of __submit_bio()
- In f2fs_write_begin(), use dn.data_blkaddr instead of blkaddr
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:46 +01:00
Chao Yu
4aa4ce1c4a
f2fs: fix inode cache leak
...
commit f61cce5b81f91ba336184008b24baec84afbb3dd upstream.
When testing f2fs with inline_dentry option, generic/342 reports:
VFS: Busy inodes after unmount of dm-0. Self-destruct in 5 seconds. Have a nice day...
After rmmod f2fs module, kenrel shows following dmesg:
=============================================================================
BUG f2fs_inode_cache (Tainted: G O ): Objects remaining in f2fs_inode_cache on __kmem_cache_shutdown()
-----------------------------------------------------------------------------
Disabling lock debugging due to kernel taint
INFO: Slab 0xf51ca0e0 objects=22 used=1 fp=0xd1e6fc60 flags=0x40004080
CPU: 3 PID: 7455 Comm: rmmod Tainted: G B O 4.6.0-rc4+ #16
Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
00000086 00000086 d062fe18 c13a83a0 f51ca0e0 d062fe38 d062fea4 c11c7276
c1981040 f51ca0e0 00000016 00000001 d1e6fc60 40004080 656a624f 20737463
616d6572 6e696e69 6e692067 66326620 6e695f73 5f65646f 68636163 6e6f2065
Call Trace:
[<c13a83a0>] dump_stack+0x5f/0x8f
[<c11c7276>] slab_err+0x76/0x80
[<c11cbfc0>] ? __kmem_cache_shutdown+0x100/0x2f0
[<c11cbfc0>] ? __kmem_cache_shutdown+0x100/0x2f0
[<c11cbfe5>] __kmem_cache_shutdown+0x125/0x2f0
[<c1198a38>] kmem_cache_destroy+0x158/0x1f0
[<c176b43d>] ? mutex_unlock+0xd/0x10
[<f8f15aa3>] exit_f2fs_fs+0x4b/0x5a8 [f2fs]
[<c10f596c>] SyS_delete_module+0x16c/0x1d0
[<c1001b10>] ? do_fast_syscall_32+0x30/0x1c0
[<c13c59bf>] ? __this_cpu_preempt_check+0xf/0x20
[<c10afa7d>] ? trace_hardirqs_on_caller+0xdd/0x210
[<c10ad50b>] ? trace_hardirqs_off+0xb/0x10
[<c1001b81>] do_fast_syscall_32+0xa1/0x1c0
[<c176d888>] sysenter_past_esp+0x45/0x74
INFO: Object 0xd1e6d9e0 @offset=6624
kmem_cache_destroy f2fs_inode_cache: Slab cache still has objects
CPU: 3 PID: 7455 Comm: rmmod Tainted: G B O 4.6.0-rc4+ #16
Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
00000286 00000286 d062fef4 c13a83a0 f174b000 d062ff14 d062ff28 c1198ac7
c197fe18 f3c5b980 d062ff20 000d04f2 d062ff0c d062ff0c d062ff14 d062ff14
f8f20dc0 fffffff5 d062e000 d062ff30 f8f15aa3 d062ff7c c10f596c 73663266
Call Trace:
[<c13a83a0>] dump_stack+0x5f/0x8f
[<c1198ac7>] kmem_cache_destroy+0x1e7/0x1f0
[<f8f15aa3>] exit_f2fs_fs+0x4b/0x5a8 [f2fs]
[<c10f596c>] SyS_delete_module+0x16c/0x1d0
[<c1001b10>] ? do_fast_syscall_32+0x30/0x1c0
[<c13c59bf>] ? __this_cpu_preempt_check+0xf/0x20
[<c10afa7d>] ? trace_hardirqs_on_caller+0xdd/0x210
[<c10ad50b>] ? trace_hardirqs_off+0xb/0x10
[<c1001b81>] do_fast_syscall_32+0xa1/0x1c0
[<c176d888>] sysenter_past_esp+0x45/0x74
The reason is: in recovery flow, we use delayed iput mechanism for directory
which has recovered dentry block. It means the reference of inode will be
held until last dirty dentry page being writebacked.
But when we mount f2fs with inline_dentry option, during recovery, dirent
may only be recovered into dir inode page rather than dentry page, so there
are no chance for us to release inode reference in ->writepage when
writebacking last dentry page.
We can call paired iget/iput explicityly for inline_dentry case, but for
non-inline_dentry case, iput will call writeback_single_inode to write all
data pages synchronously, but during recovery, ->writepages of f2fs skips
writing all pages, result in losing dirent.
This patch fixes this issue by obsoleting old mechanism, and introduce a
new dir_list to hold all directory inodes which has recovered datas until
finishing recovery.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[bwh: Backported to 4.4:
- Deleted add_dirty_dir_inode() function is different
- Adjust context]
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-01-26 09:42:46 +01:00
J. Bruce Fields
Hans Verkuil
James Morris
Hans Verkuil
Vlad Tsyrklevich
YunQiang Su
Jonathan Hunter
Arnd Bergmann
Ivan Mironov
Kees Cook
Josef Bacik
Eric Biggers
Harsh Jain
Willem de Bruijn
Jason Gunthorpe
JianJhen Chen
Eric Dumazet
Mark Rutland
Gwendal Grignou
Ben Hutchings
Martin Blumenstingl
Jaegeuk Kim
Chao Yu
Ben Hutchings
Yunlei He
Tiezhu Yang