IF YOU WOULD LIKE TO GET AN ACCOUNT, please write an
email to Administrator. User accounts are meant only to access repo
and report issues and/or generate pull requests.
This is a purpose-specific Git hosting for
BaseALT
projects. Thank you for your understanding!
Только зарегистрированные пользователи имеют доступ к сервису!
Для получения аккаунта, обратитесь к администратору.
commit 182a79e0c17147d2c2d3990a9a7b6b58a1561c7a upstream.
We return most failure of dquota_initialize() except
inode evict, this could make a bit sense, for example
we allow file removal even quota files are broken?
But it dosen't make sense to allow setting project
if quota files etc are broken.
Signed-off-by: Wang Shilong <wshilong@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 625ef8a3acd111d5f496d190baf99d1a815bd03e upstream.
Variable retries is not initialized in ext4_da_write_inline_data_begin()
which can lead to nondeterministic number of retries in case we hit
ENOSPC. Initialize retries to zero as we do everywhere else.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Fixes: bc0ca9df3b2a ("ext4: retry allocation when inline->extent conversion failed")
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 3df629d873f8683af6f0d34dfc743f637966d483 upstream.
get in sync with mount_bdev() handling of the same
Reported-by: syzbot+c54f8e94e6bba03b04e9@syzkaller.appspotmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit ccd3c4373eacb044eb3832966299d13d2631f66f upstream.
The code cleaning transaction's lists of checkpoint buffers has a bug
where it increases bh refcount only after releasing
journal->j_list_lock. Thus the following race is possible:
CPU0 CPU1
jbd2_log_do_checkpoint()
jbd2_journal_try_to_free_buffers()
__journal_try_to_free_buffer(bh)
...
while (transaction->t_checkpoint_io_list)
...
if (buffer_locked(bh)) {
<-- IO completes now, buffer gets unlocked -->
spin_unlock(&journal->j_list_lock);
spin_lock(&journal->j_list_lock);
__jbd2_journal_remove_checkpoint(jh);
spin_unlock(&journal->j_list_lock);
try_to_free_buffers(page);
get_bh(bh) <-- accesses freed bh
Fix the problem by grabbing bh reference before unlocking
journal->j_list_lock.
Fixes: dc6e8d669cf5 ("jbd2: don't call get_bh() before calling __jbd2_journal_remove_checkpoint()")
Fixes: be1158cc615f ("jbd2: fold __process_buffer() into jbd2_log_do_checkpoint()")
Reported-by: syzbot+7f4a27091759e2fe7453@syzkaller.appspotmail.com
CC: stable@vger.kernel.org
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit f18b2b83a727a3db208308057d2c7945f368e625 ]
If the starting block number of either the source or destination file
exceeds the EOF, EXT4_IOC_MOVE_EXT should return EINVAL.
Also fixed the helper function mext_check_coverage() so that if the
logical block is beyond EOF, make it return immediately, instead of
looping until the block number wraps all the away around. This takes
long enough that if there are multiple threads trying to do pound on
an the same inode doing non-sensical things, it can end up triggering
the kernel's soft lockup detector.
Reported-by: syzbot+c61979f6f2cba5cb3c06@syzkaller.appspotmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 92e2921f7eee63450a5f953f4b15dc6210219430 upstream.
When an invalid mount option is passed to jffs2, jffs2_parse_options()
will fail and jffs2_sb_info will be freed, but then jffs2_sb_info will
be used (use-after-free) and freeed (double-free) in jffs2_kill_sb().
Fix it by removing the buggy invocation of kfree() when getting invalid
mount options.
Fixes: 92abc475d8de ("jffs2: implement mount option parsing and compression overriding")
Cc: stable@kernel.org
Signed-off-by: Hou Tao <houtao1@huawei.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 169b803397499be85bdd1e3d07d6f5e3d4bd669e upstream.
the victim might've been rmdir'ed just before the lock_rename();
unlike the normal callers, we do not look the source up after the
parents are locked - we know it beforehand and just recheck that it's
still the child of what used to be its parent. Unfortunately,
the check is too weak - we don't spot a dead directory since its
->d_parent is unchanged, dentry is positive, etc. So we sail all
the way to ->rename(), with hosting filesystems _not_ expecting
to be asked renaming an rmdir'ed subdirectory.
The fix is easy, fortunately - the lock on parent is sufficient for
making IS_DEADDIR() on child safe.
Cc: stable@vger.kernel.org
Fixes: 9ae326a69004 (CacheFiles: A cache that backs onto a mounted filesystem)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit a606ebdb859e78beb757dfefa08001df366e2ef5 ]
The truncate transaction does not ever modify the inode btree, but
includes an associated log reservation. Update
xfs_calc_itruncate_reservation() to remove the reservation
associated with inobt updates.
[Amir: This commit was merged for kernel v4.16 and a twin commit was
merged for xfsprogs v4.16. As a result, a small xfs filesystem
formatted with features -m rmapbt=1,reflink=1 using mkfs.xfs
version >= v4.16 cannot be mounted with kernel < v4.16.
For example, xfstests generic/17{1,2,3} format a small fs and
when trying to mount it, they fail with an assert on this very
demonic line:
XFS (vdc): Log size 3075 blocks too small, minimum size is 3717 blocks
XFS (vdc): AAIEEE! Log failed size checks. Abort!
XFS: Assertion failed: 0, file: src/linux/fs/xfs/xfs_log.c, line: 666
The simple solution for stable kernels is to apply this patch,
because mkfs.xfs v4.16 is already in the wild, so we have to
assume that xfs filesystems with a "too small" log exist.
Regardless, xfsprogs maintainers should also consider reverting
the twin patch to stop creating those filesystems for the sake
of users with unpatched kernels.]
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Cc: <stable@vger.kernel.org> # v4.9+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Darrick J . Wong <darrick.wong@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit ac081c3be3fae6d0cc3e1862507fca3862d30b67 ]
On non-preempt kernels this loop can take a long time (more than 50 ticks)
processing through entries.
Link: http://lkml.kernel.org/r/20181010172623.57033-1-khazhy@google.com
Signed-off-by: Khazhismel Kumykov <khazhy@google.com>
Acked-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 3995bbf53bd2047f2720c6fdd4bf38f6d942a0c0 ]
On 32-bit (e.g. with m68k-linux-gnu-gcc-4.1):
fs/cifs/inode.c: In function ‘simple_hashstr’:
fs/cifs/inode.c:713: warning: integer constant is too large for ‘long’ type
Fixes: 7ea884c77e5c97f1 ("smb3: Fix root directory when server returns inode number of zero")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 24e52b11e0ca788513b945a87b57cc0522a92933 ]
When doing an incremental send, while processing an extent that changed
between the parent and send snapshots and that extent was an inline extent
in the parent snapshot, it's possible to access a memory region beyond
the end of leaf if the inline extent is very small and it is the first
item in a leaf.
An example scenario is described below.
The send snapshot has the following leaf:
leaf 33865728 items 33 free space 773 generation 46 owner 5
fs uuid ab7090d8-dafd-4fb9-9246-723b6d2e2fb7
chunk uuid 2d16478c-c704-4ab9-b574-68bff2281b1f
(...)
item 14 key (335 EXTENT_DATA 0) itemoff 3052 itemsize 53
generation 36 type 1 (regular)
extent data disk byte 12791808 nr 4096
extent data offset 0 nr 4096 ram 4096
extent compression 0 (none)
item 15 key (335 EXTENT_DATA 8192) itemoff 2999 itemsize 53
generation 36 type 1 (regular)
extent data disk byte 138170368 nr 225280
extent data offset 0 nr 225280 ram 225280
extent compression 0 (none)
(...)
And the parent snapshot has the following leaf:
leaf 31272960 items 17 free space 17 generation 31 owner 5
fs uuid ab7090d8-dafd-4fb9-9246-723b6d2e2fb7
chunk uuid 2d16478c-c704-4ab9-b574-68bff2281b1f
item 0 key (335 EXTENT_DATA 0) itemoff 3951 itemsize 44
generation 31 type 0 (inline)
inline extent data size 23 ram_bytes 613 compression 1 (zlib)
(...)
When computing the send stream, it is detected that the extent of inode
335, at file offset 0, and at fs/btrfs/send.c:is_extent_unchanged() we
grab the leaf from the parent snapshot and access the inline extent item.
However, before jumping to the 'out' label, we access the 'offset' and
'disk_bytenr' fields of the extent item, which should not be done for
inline extents since the inlined data starts at the offset of the
'disk_bytenr' field and can be very small. For example accessing the
'offset' field of the file extent item results in the following trace:
[ 599.705368] general protection fault: 0000 [#1] PREEMPT SMP
[ 599.706296] Modules linked in: btrfs psmouse i2c_piix4 ppdev acpi_cpufreq serio_raw parport_pc i2c_core evdev tpm_tis tpm_tis_core sg pcspkr parport tpm button su$
[ 599.709340] CPU: 7 PID: 5283 Comm: btrfs Not tainted 4.10.0-rc8-btrfs-next-46+ #1
[ 599.709340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
[ 599.709340] task: ffff88023eedd040 task.stack: ffffc90006658000
[ 599.709340] RIP: 0010:read_extent_buffer+0xdb/0xf4 [btrfs]
[ 599.709340] RSP: 0018:ffffc9000665ba00 EFLAGS: 00010286
[ 599.709340] RAX: db73880000000000 RBX: 0000000000000000 RCX: 0000000000000001
[ 599.709340] RDX: ffffc9000665ba60 RSI: db73880000000000 RDI: ffffc9000665ba5f
[ 599.709340] RBP: ffffc9000665ba30 R08: 0000000000000001 R09: ffff88020dc5e098
[ 599.709340] R10: 0000000000001000 R11: 0000160000000000 R12: 6db6db6db6db6db7
[ 599.709340] R13: ffff880000000000 R14: 0000000000000000 R15: ffff88020dc5e088
[ 599.709340] FS: 00007f519555a8c0(0000) GS:ffff88023f3c0000(0000) knlGS:0000000000000000
[ 599.709340] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 599.709340] CR2: 00007f1411afd000 CR3: 0000000235f8e000 CR4: 00000000000006e0
[ 599.709340] Call Trace:
[ 599.709340] btrfs_get_token_64+0x93/0xce [btrfs]
[ 599.709340] ? printk+0x48/0x50
[ 599.709340] btrfs_get_64+0xb/0xd [btrfs]
[ 599.709340] process_extent+0x3a1/0x1106 [btrfs]
[ 599.709340] ? btree_read_extent_buffer_pages+0x5/0xef [btrfs]
[ 599.709340] changed_cb+0xb03/0xb3d [btrfs]
[ 599.709340] ? btrfs_get_token_32+0x7a/0xcc [btrfs]
[ 599.709340] btrfs_compare_trees+0x432/0x53d [btrfs]
[ 599.709340] ? process_extent+0x1106/0x1106 [btrfs]
[ 599.709340] btrfs_ioctl_send+0x960/0xe26 [btrfs]
[ 599.709340] btrfs_ioctl+0x181b/0x1fed [btrfs]
[ 599.709340] ? trace_hardirqs_on_caller+0x150/0x1ac
[ 599.709340] vfs_ioctl+0x21/0x38
[ 599.709340] ? vfs_ioctl+0x21/0x38
[ 599.709340] do_vfs_ioctl+0x611/0x645
[ 599.709340] ? rcu_read_unlock+0x5b/0x5d
[ 599.709340] ? __fget+0x6d/0x79
[ 599.709340] SyS_ioctl+0x57/0x7b
[ 599.709340] entry_SYSCALL_64_fastpath+0x18/0xad
[ 599.709340] RIP: 0033:0x7f51945eec47
[ 599.709340] RSP: 002b:00007ffc21c13e98 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
[ 599.709340] RAX: ffffffffffffffda RBX: ffffffff81096459 RCX: 00007f51945eec47
[ 599.709340] RDX: 00007ffc21c13f20 RSI: 0000000040489426 RDI: 0000000000000004
[ 599.709340] RBP: ffffc9000665bf98 R08: 00007f519450d700 R09: 00007f519450d700
[ 599.709340] R10: 00007f519450d9d0 R11: 0000000000000202 R12: 0000000000000046
[ 599.709340] R13: ffffc9000665bf78 R14: 0000000000000000 R15: 00007f5195574040
[ 599.709340] ? trace_hardirqs_off_caller+0x43/0xb1
[ 599.709340] Code: 29 f0 49 39 d8 4c 0f 47 c3 49 03 81 58 01 00 00 44 89 c1 4c 01 c2 4c 29 c3 48 c1 f8 03 49 0f af c4 48 c1 e0 0c 4c 01 e8 48 01 c6 <f3> a4 31 f6 4$
[ 599.709340] RIP: read_extent_buffer+0xdb/0xf4 [btrfs] RSP: ffffc9000665ba00
[ 599.762057] ---[ end trace fe00d7af61b9f49e ]---
This is because the 'offset' field starts at an offset of 37 bytes
(offsetof(struct btrfs_file_extent_item, offset)), has a length of 8
bytes and therefore attemping to read it causes a 1 byte access beyond
the end of the leaf, as the first item's content in a leaf is located
at the tail of the leaf, the item size is 44 bytes and the offset of
that field plus its length (37 + 8 = 45) goes beyond the item's size
by 1 byte.
So fix this by accessing the 'offset' and 'disk_bytenr' fields after
jumping to the 'out' label if we are processing an inline extent. We
move the reading operation of the 'disk_bytenr' field too because we
have the same problem as for the 'offset' field explained above when
the inline data is less then 8 bytes. The access to the 'generation'
field is also moved but just for the sake of grouping access to all
the fields.
Fixes: e1cbfd7bf6da ("Btrfs: send, fix file hole not being preserved due to inline extent")
Cc: <stable@vger.kernel.org> # v4.12+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 8818efaaacb78c60a9d90c5705b6c99b75d7d442 ]
Another deadlock path caused by recursive locking is reported. This
kind of issue was introduced since commit 743b5f1434f5 ("ocfs2: take
inode lock in ocfs2_iop_set/get_acl()"). Two deadlock paths have been
fixed by commit b891fa5024a9 ("ocfs2: fix deadlock issue when taking
inode lock at vfs entry points"). Yes, we intend to fix this kind of
case in incremental way, because it's hard to find out all possible
paths at once.
This one can be reproduced like this. On node1, cp a large file from
home directory to ocfs2 mountpoint. While on node2, run
setfacl/getfacl. Both nodes will hang up there. The backtraces:
On node1:
__ocfs2_cluster_lock.isra.39+0x357/0x740 [ocfs2]
ocfs2_inode_lock_full_nested+0x17d/0x840 [ocfs2]
ocfs2_write_begin+0x43/0x1a0 [ocfs2]
generic_perform_write+0xa9/0x180
__generic_file_write_iter+0x1aa/0x1d0
ocfs2_file_write_iter+0x4f4/0xb40 [ocfs2]
__vfs_write+0xc3/0x130
vfs_write+0xb1/0x1a0
SyS_write+0x46/0xa0
On node2:
__ocfs2_cluster_lock.isra.39+0x357/0x740 [ocfs2]
ocfs2_inode_lock_full_nested+0x17d/0x840 [ocfs2]
ocfs2_xattr_set+0x12e/0xe80 [ocfs2]
ocfs2_set_acl+0x22d/0x260 [ocfs2]
ocfs2_iop_set_acl+0x65/0xb0 [ocfs2]
set_posix_acl+0x75/0xb0
posix_acl_xattr_set+0x49/0xa0
__vfs_setxattr+0x69/0x80
__vfs_setxattr_noperm+0x72/0x1a0
vfs_setxattr+0xa7/0xb0
setxattr+0x12d/0x190
path_setxattr+0x9f/0xb0
SyS_setxattr+0x14/0x20
Fix this one by using ocfs2_inode_{lock|unlock}_tracker, which is
exported by commit 439a36b8ef38 ("ocfs2/dlmglue: prepare tracking logic
to avoid recursive cluster lock").
Link: http://lkml.kernel.org/r/20170622014746.5815-1-zren@suse.com
Fixes: 743b5f1434f5 ("ocfs2: take inode lock in ocfs2_iop_set/get_acl()")
Signed-off-by: Eric Ren <zren@suse.com>
Reported-by: Thomas Voegtle <tv@lio96.de>
Tested-by: Thomas Voegtle <tv@lio96.de>
Reviewed-by: Joseph Qi <jiangqi903@gmail.com>
Cc: Mark Fasheh <mfasheh@versity.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 452e62b71fbbefe2646fad3a968371a026936c6d ]
Before this, we use 'filled' mode here, ie. if all range has been
filled with EXTENT_DEFRAG bits, get to clear it, but if the defrag
range joins the adjacent delalloc range, then we'll have EXTENT_DEFRAG
bits in extent_state until releasing this inode's pages, and that
prevents extent_data from being freed.
This clears the bit if any was found within the ordered extent.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 4751832da990a927c37526ae67b9226ea01eb99e ]
[BUG]
Cycle mount btrfs can cause fiemap to return different result.
Like:
# mount /dev/vdb5 /mnt/btrfs
# dd if=/dev/zero bs=16K count=4 oflag=dsync of=/mnt/btrfs/file
# xfs_io -c "fiemap -v" /mnt/btrfs/file
/mnt/test/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..127]: 25088..25215 128 0x1
# umount /mnt/btrfs
# mount /dev/vdb5 /mnt/btrfs
# xfs_io -c "fiemap -v" /mnt/btrfs/file
/mnt/test/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..31]: 25088..25119 32 0x0
1: [32..63]: 25120..25151 32 0x0
2: [64..95]: 25152..25183 32 0x0
3: [96..127]: 25184..25215 32 0x1
But after above fiemap, we get correct merged result if we call fiemap
again.
# xfs_io -c "fiemap -v" /mnt/btrfs/file
/mnt/test/file:
EXT: FILE-OFFSET BLOCK-RANGE TOTAL FLAGS
0: [0..127]: 25088..25215 128 0x1
[REASON]
Btrfs will try to merge extent map when inserting new extent map.
btrfs_fiemap(start=0 len=(u64)-1)
|- extent_fiemap(start=0 len=(u64)-1)
|- get_extent_skip_holes(start=0 len=64k)
| |- btrfs_get_extent_fiemap(start=0 len=64k)
| |- btrfs_get_extent(start=0 len=64k)
| | Found on-disk (ino, EXTENT_DATA, 0)
| |- add_extent_mapping()
| |- Return (em->start=0, len=16k)
|
|- fiemap_fill_next_extent(logic=0 phys=X len=16k)
|
|- get_extent_skip_holes(start=0 len=64k)
| |- btrfs_get_extent_fiemap(start=0 len=64k)
| |- btrfs_get_extent(start=16k len=48k)
| | Found on-disk (ino, EXTENT_DATA, 16k)
| |- add_extent_mapping()
| | |- try_merge_map()
| | Merge with previous em start=0 len=16k
| | resulting em start=0 len=32k
| |- Return (em->start=0, len=32K) << Merged result
|- Stripe off the unrelated range (0~16K) of return em
|- fiemap_fill_next_extent(logic=16K phys=X+16K len=16K)
^^^ Causing split fiemap extent.
And since in add_extent_mapping(), em is already merged, in next
fiemap() call, we will get merged result.
[FIX]
Here we introduce a new structure, fiemap_cache, which records previous
fiemap extent.
And will always try to merge current fiemap_cache result before calling
fiemap_fill_next_extent().
Only when we failed to merge current fiemap extent with cached one, we
will call fiemap_fill_next_extent() to submit cached one.
So by this method, we can merge all fiemap extents.
It can also be done in fs/ioctl.c, however the problem is if
fieinfo->fi_extents_max == 0, we have no space to cache previous fiemap
extent.
So I choose to merge it in btrfs.
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 5f13e58767a53ebb54265e03c0c4a67650286263 ]
A previous patch which claimed to remove off by ones actually introduced
them.
strlen() returns the length of the string not including the NUL
character. We are using strcpy() to copy "name" into a buffer which is
ORANGEFS_MAX_XATTR_NAMELEN characters long. We should make sure to
leave space for the NUL, otherwise we're writing one character beyond
the end of the buffer.
Fixes: e675c5ec51fe ("orangefs: clean up oversize xattr validation")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mike Marshall <hubcap@omnibond.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit d3bb910c15d75ee3340311c64a1c05985bb663a3 ]
Commit 88c5c13a5027 (f2fs: fix multiple f2fs_add_link() calls having
same name) does not cover the scenario where inline dentry is enabled.
In that case, F2FS_I(dir)->task will be NULL, and __f2fs_add_link will
lookup dentries one more time.
This patch fixes it by moving the assigment of current task to a upper
level to cover both normal and inline dentry.
Cc: <stable@vger.kernel.org>
Fixes: 88c5c13a5027 (f2fs: fix multiple f2fs_add_link() calls having same name)
Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit 8bc1379b82b8e809eef77a9fedbb75c6c297be19 upstream.
Use a separate journal transaction if it turns out that we need to
convert an inline file to use an data block. Otherwise we could end
up failing due to not having journal credits.
This addresses CVE-2018-10883.
https://bugzilla.kernel.org/show_bug.cgi?id=200071
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
[fengc@google.com: 4.4 and 4.9 backport: adjust context]
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 7fb1327ee9b92fca27662f9b9d60c7c3376d6c69 upstream.
Kernel CPU stats are stored in cputime_t which is an architecture
defined type, and hence a bit opaque and requiring accessors and mutators
for any operation.
Converting them to nsecs simplifies the code and is one step toward
the removal of cputime_t in the core code.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1485832191-26889-4-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
[colona: minor conflict as 527b0a76f41d ("sched/cpuacct: Avoid %lld seq_printf
warning") is missing from v4.9]
Signed-off-by: Ivan Delalande <colona@arista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 37f31b6ca4311b94d985fb398a72e5399ad57925 upstream.
The requested device name can be NULL or an empty string.
Check for that and refuse to continue. UBIFS has to do this manually
since we cannot use mount_bdev(), which checks for this condition.
Fixes: 1e51764a3c2ac ("UBIFS: add new flash file system")
Reported-by: syzbot+38bd0f7865e5c6379280@syzkaller.appspotmail.com
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 513f86d73855ce556ea9522b6bfd79f87356dc3a upstream.
If there an inode points to a block which is also some other type of
metadata block (such as a block allocation bitmap), the
buffer_verified flag can be set when it was validated as that other
metadata block type; however, it would make a really terrible external
attribute block. The reason why we use the verified flag is to avoid
constantly reverifying the block. However, it doesn't take much
overhead to make sure the magic number of the xattr block is correct,
and this will avoid potential crashes.
This addresses CVE-2018-10879.
https://bugzilla.kernel.org/show_bug.cgi?id=200001
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
[Backported to 4.9: adjust context]
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 5369a762c882c0b6e9599e4ebbb3a9ba9eee7e2d upstream.
In theory this should have been caught earlier when the xattr list was
verified, but in case it got missed, it's simple enough to add check
to make sure we don't overrun the xattr buffer.
This addresses CVE-2018-10879.
https://bugzilla.kernel.org/show_bug.cgi?id=200001
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
[bwh: Backported to 3.16:
- Add inode parameter to ext4_xattr_set_entry() and update callers
- Return -EIO instead of -EFSCORRUPTED on error
- Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
[adjusted context for 4.9]
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit cbe355f57c8074bc4f452e5b6e35509044c6fa23 upstream.
In dlm_init_lockres() we access and modify res->tracking and
dlm->tracking_list without holding dlm->track_lock. This can cause list
corruptions and can end up in kernel panic.
Fix this by locking res->tracking and dlm->tracking_list with
dlm->track_lock instead of dlm->spinlock.
Link: http://lkml.kernel.org/r/1529951192-4686-1-git-send-email-ashish.samant@oracle.com
Signed-off-by: Ashish Samant <ashish.samant@oracle.com>
Reviewed-by: Changwei Ge <ge.changwei@h3c.com>
Acked-by: Joseph Qi <jiangqi903@gmail.com>
Acked-by: Jun Piao <piaojun@huawei.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <ge.changwei@h3c.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit f8a00cef17206ecd1b30d3d9f99e10d9fa707aa7 upstream.
Currently, you can use /proc/self/task/*/stack to cause a stack walk on
a task you control while it is running on another CPU. That means that
the stack can change under the stack walker. The stack walker does
have guards against going completely off the rails and into random
kernel memory, but it can interpret random data from your kernel stack
as instruction pointers and stack pointers. This can cause exposure of
kernel stack contents to userspace.
Restrict the ability to inspect kernel stacks of arbitrary tasks to root
in order to prevent a local attacker from exploiting racy stack unwinding
to leak kernel task stack contents. See the added comment for a longer
rationale.
There don't seem to be any users of this userspace API that can't
gracefully bail out if reading from the file fails. Therefore, I believe
that this change is unlikely to break things. In the case that this patch
does end up needing a revert, the next-best solution might be to fake a
single-entry stack based on wchan.
Link: http://lkml.kernel.org/r/20180927153316.200286-1-jannh@google.com
Fixes: 2ec220e27f50 ("proc: add /proc/*/stack")
Signed-off-by: Jann Horn <jannh@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Ken Chen <kenchen@google.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 0595751f267994c3c7027377058e4185b3a28e75 upstream.
When mounting a Windows share that is the root of a drive (eg. C$)
the server does not return . and .. directory entries. This results in
the smb2 code path erroneously skipping the 2 first entries.
Pseudo-code of the readdir() code path:
cifs_readdir(struct file, struct dir_context)
initiate_cifs_search <-- if no reponse cached yet
server->ops->query_dir_first
dir_emit_dots
dir_emit <-- adds "." and ".." if we're at pos=0
find_cifs_entry
initiate_cifs_search <-- if pos < start of current response
(restart search)
server->ops->query_dir_next <-- if pos > end of current response
(fetch next search res)
for(...) <-- loops over cur response entries
starting at pos
cifs_filldir <-- skip . and .., emit entry
cifs_fill_dirent
dir_emit
pos++
A) dir_emit_dots() always adds . & ..
and sets the current dir pos to 2 (0 and 1 are done).
Therefore we always want the index_to_find to be 2 regardless of if
the response has . and ..
B) smb1 code initializes index_of_last_entry with a +2 offset
in cifssmb.c CIFSFindFirst():
psrch_inf->index_of_last_entry = 2 /* skip . and .. */ +
psrch_inf->entries_in_buffer;
Later in find_cifs_entry() we want to find the next dir entry at pos=2
as a result of (A)
first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
cfile->srch_inf.entries_in_buffer;
This var is the dir pos that the first entry in the buffer will
have therefore it must be 2 in the first call.
If we don't offset index_of_last_entry by 2 (like in (B)),
first_entry_in_buffer=0 but we were instructed to get pos=2 so this
code in find_cifs_entry() skips the 2 first which is ok for non-root
shares, as it skips . and .. from the response but is not ok for root
shares where the 2 first are actual files
pos_in_buf = index_to_find - first_entry_in_buffer;
// pos_in_buf=2
// we skip 2 first response entries :(
for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
/* go entry by entry figuring out which is first */
cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
cfile->srch_inf.info_level);
}
C) cifs_filldir() skips . and .. so we can safely ignore them for now.
Sample program:
int main(int argc, char **argv)
{
const char *path = argc >= 2 ? argv[1] : ".";
DIR *dh;
struct dirent *de;
printf("listing path <%s>\n", path);
dh = opendir(path);
if (!dh) {
printf("opendir error %d\n", errno);
return 1;
}
while (1) {
de = readdir(dh);
if (!de) {
if (errno) {
printf("readdir error %d\n", errno);
return 1;
}
printf("end of listing\n");
break;
}
printf("off=%lu <%s>\n", de->d_off, de->d_name);
}
return 0;
}
Before the fix with SMB1 on root shares:
<.> off=1
<..> off=2
<$Recycle.Bin> off=3
<bootmgr> off=4
and on non-root shares:
<.> off=1
<..> off=4 <-- after adding .., the offsets jumps to +2 because
<2536> off=5 we skipped . and .. from response buffer (C)
<411> off=6 but still incremented pos
<file> off=7
<fsx> off=8
Therefore the fix for smb2 is to mimic smb1 behaviour and offset the
index_of_last_entry by 2.
Test results comparing smb1 and smb2 before/after the fix on root
share, non-root shares and on large directories (ie. multi-response
dir listing):
PRE FIX
=======
pre-1-root VS pre-2-root:
ERR pre-2-root is missing [bootmgr, $Recycle.Bin]
pre-1-nonroot VS pre-2-nonroot:
OK~ same files, same order, different offsets
pre-1-nonroot-large VS pre-2-nonroot-large:
OK~ same files, same order, different offsets
POST FIX
========
post-1-root VS post-2-root:
OK same files, same order, same offsets
post-1-nonroot VS post-2-nonroot:
OK same files, same order, same offsets
post-1-nonroot-large VS post-2-nonroot-large:
OK same files, same order, same offsets
REGRESSION?
===========
pre-1-root VS post-1-root:
OK same files, same order, same offsets
pre-1-nonroot VS post-1-nonroot:
OK same files, same order, same offsets
BugLink: https://bugzilla.samba.org/show_bug.cgi?id=13107
Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Paulo Alcantara <palcantara@suse.deR>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit ffc4c92227db5699493e43eb140b4cb5904c30ff upstream.
Commit 786534b92f3c introduced a regression that caused listxattr to
return the POSIX ACL attribute names even though sysfs doesn't support
POSIX ACLs. This happens because simple_xattr_list checks for NULL
i_acl / i_default_acl, but inode_init_always initializes those fields
to ACL_NOT_CACHED ((void *)-1). For example:
$ getfattr -m- -d /sys
/sys: system.posix_acl_access: Operation not supported
/sys: system.posix_acl_default: Operation not supported
Fix this in simple_xattr_list by checking if the filesystem supports POSIX ACLs.
Fixes: 786534b92f3c ("tmpfs: listxattr should include POSIX ACL xattrs")
Reported-by: Marc Aurèle La France <tsi@tuyoix.net>
Tested-by: Marc Aurèle La France <tsi@tuyoix.net>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Cc: stable@vger.kernel.org # v4.5+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 097f5863b1a0c9901f180bbd56ae7d630655faaa ]
We need to verify that the "data_offset" is within bounds.
Reported-by: Dr Silvio Cesare of InfoSect <silvio.cesare@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit bcfb84a996f6fa90b5e6e2954b2accb7a4711097 ]
A powerpc build of cifs with gcc v8.2.0 produces this warning:
fs/cifs/cifssmb.c: In function ‘CIFSSMBNegotiate’:
fs/cifs/cifssmb.c:605:3: warning: ‘strncpy’ writing 16 bytes into a region of size 1 overflows the destination [-Wstringop-overflow=]
strncpy(pSMB->DialectsArray+count, protocols[i].name, 16);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Since we are already doing a strlen() on the source, change the strncpy
to a memcpy().
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit c15e3f19a6d5c89b1209dc94b40e568177cb0921 ]
When a Mac client saves an item containing a backslash to a file server
the backslash is represented in the CIFS/SMB protocol as as U+F026.
Before this change, listing a directory containing an item with a
backslash in its name will return that item with the backslash
represented with a true backslash character (U+005C) because
convert_sfm_character mapped U+F026 to U+005C when interpretting the
CIFS/SMB protocol response. However, attempting to open or stat the
path using a true backslash will result in an error because
convert_to_sfm_char does not map U+005C back to U+F026 causing the
CIFS/SMB request to be made with the backslash represented as U+005C.
This change simply prevents the U+F026 to U+005C conversion from
happenning. This is analogous to how the code does not do any
translation of UNI_SLASH (U+F000).
Signed-off-by: Jon Kuhn <jkuhn@barracuda.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8cdb5240ec5928b20490a2bb34cb87e9a5f40226 upstream.
When expanding the extra isize space, we must never move the
system.data xattr out of the inode body. For performance reasons, it
doesn't make any sense, and the inline data implementation assumes
that system.data xattr is never in the external xattr block.
This addresses CVE-2018-10880
https://bugzilla.kernel.org/show_bug.cgi?id=200005
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
[groeck: Context changes]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 5b7b15aee641904ae269be9846610a3950cbd64c ]
We're encoding a single op in the reply but leaving the number of ops
zero, so the reply makes no sense.
Somewhat academic as this isn't a case any real client will hit, though
in theory perhaps that could change in a future protocol extension.
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 338affb548c243d2af25b1ca628e67819350de6b upstream.
When in effect, add "test_dummy_encryption" to _ext4_show_options() so
that it is shown in /proc/mounts and other relevant procfs files.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit fe18d649891d813964d3aaeebad873f281627fbc upstream.
Marking mmp bh dirty before writing it will make writeback
pick up mmp block later and submit a write, we don't want the
duplicate write as kmmpd thread should have full control of
reading and writing the mmp block.
Another reason is we will also have random I/O error on
the writeback request when blk integrity is enabled, because
kmmpd could modify the content of the mmp block(e.g. setting
new seq and time) while the mmp block is under I/O requested
by writeback.
Signed-off-by: Li Dongyang <dongyangli@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 5f8c10936fab2b69a487400f2872902e597dd320 upstream.
An online resize of a file system with the bigalloc feature enabled
and a 1k block size would be refused since ext4_resize_begin() did not
understand s_first_data_block is 0 for all bigalloc file systems, even
when the block size is 1k.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit f0a459dec5495a3580f8d784555e6f8f3bf7f263 upstream.
Avoid growing the file system to an extent so that the last block
group is too small to hold all of the metadata that must be stored in
the block group.
This problem can be triggered with the following reproducer:
umount /mnt
mke2fs -F -m0 -b 4096 -t ext4 -O resize_inode,^has_journal \
-E resize=1073741824 /tmp/foo.img 128M
mount /tmp/foo.img /mnt
truncate --size 1708M /tmp/foo.img
resize2fs /dev/loop0 295400
umount /mnt
e2fsck -fy /tmp/foo.img
Reported-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 4274f516d4bc50648a4d97e4f67ecbd7b65cde4a upstream.
When mounting the superblock, ext4_fill_super() calculates the free
blocks and free inodes and stores them in the superblock. It's not
strictly necessary, since we don't use them any more, but it's nice to
keep them roughly aligned to reality.
Since it's not critical for file system correctness, the code doesn't
call ext4_commit_super(). The problem is that it's in
ext4_commit_super() that we recalculate the superblock checksum. So
if we're not going to call ext4_commit_super(), we need to call
ext4_superblock_csum_set() to make sure the superblock checksum is
consistent.
Most of the time, this doesn't matter, since we end up calling
ext4_commit_super() very soon thereafter, and definitely by the time
the file system is unmounted. However, it doesn't work in this
sequence:
mke2fs -Fq -t ext4 /dev/vdc 128M
mount /dev/vdc /vdc
cp xfstests/git-versions /vdc
godown /vdc
umount /vdc
mount /dev/vdc
tune2fs -l /dev/vdc
With this commit, the "tune2fs -l" no longer fails.
Reported-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 4d982e25d0bdc83d8c64e66fdeca0b89240b3b85 upstream.
A specially crafted file system can trick empty_inline_dir() into
reading past the last valid entry in a inline directory, and then run
into the end of xattr marker. This will trigger a divide by zero
fault. Fix this by using the size of the inline directory instead of
dir->i_size.
Also clean up error reporting in __ext4_check_dir_entry so that the
message is clearer and more understandable --- and avoids the division
by zero trap if the size passed in is zero. (I'm not sure why we
coded it that way in the first place; printing offset % size is
actually more confusing and less useful.)
https://bugzilla.kernel.org/show_bug.cgi?id=200933
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reported-by: Wen Xu <wen.xu@gatech.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit b50282f3241acee880514212d88b6049fb5039c8 upstream.
If the destination of the rename(2) system call exists, the inode's
link count (i_nlinks) must be non-zero. If it is, the inode can end
up on the orphan list prematurely, leading to all sorts of hilarity,
including a use-after-free.
https://bugzilla.kernel.org/show_bug.cgi?id=200931
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reported-by: Wen Xu <wen.xu@gatech.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit cc57c07343bd071cdf1915a91a24ab7d40c9b590 ]
This patch fixes a bug where configfs_register_group had added
a group in a tree, and userspace has done a rmdir on a dir somewhere
above that group and we hit a kernel crash. The problem is configfs_rmdir
will detach everything under it and unlink groups on the default_groups
list. It will not unlink groups added with configfs_register_group so when
configfs_unregister_group is called to drop its references to the group/items
we crash when we try to access the freed dentrys.
The patch just adds a check for if a rmdir has been done above
us and if so just does the unlink part of unregistration.
Sorry if you are getting this multiple times. I thouhgt I sent
this to some of you and lkml, but I do not see it.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 2f819db565e82e5f73cd42b39925098986693378 ]
The regset API documented in <linux/regset.h> defines -ENODEV as the
result of the `->active' handler to be used where the feature requested
is not available on the hardware found. However code handling core file
note generation in `fill_thread_core_info' interpretes any non-zero
result from the `->active' handler as the regset requested being active.
Consequently processing continues (and hopefully gracefully fails later
on) rather than being abandoned right away for the regset requested.
Fix the problem then by making the code proceed only if a positive
result is returned from the `->active' handler.
Signed-off-by: Maciej W. Rozycki <macro@mips.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: 4206d3aa1978 ("elf core dump: notes user_regset")
Patchwork: https://patchwork.linux-mips.org/patch/19332/
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: James Hogan <jhogan@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 994b15b983a72e1148a173b61e5b279219bb45ae upstream.
The previous fix broke recovery of delegated stateids because it assumes
that if we did not mark the delegation as suspect, then the delegation has
effectively been revoked, and so it removes that delegation irrespectively
of whether or not it is valid and still in use. While this is "mostly
harmless" for ordinary I/O, we've seen pNFS fail with LAYOUTGET spinning
in an infinite loop while complaining that we're using an invalid stateid
(in this case the all-zero stateid).
What we rather want to do here is ensure that the delegation is always
correctly marked as needing testing when that is the case. So we want
to close the loophole offered by nfs4_schedule_stateid_recovery(),
which marks the state as needing to be reclaimed, but not the
delegation that may be backing it.
Fixes: 0e3d3e5df07dc ("NFSv4.1 fix infinite loop on IO BAD_STATEID error")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v4.11+
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 56446f218af1133c802dad8e9e116f07f381846c upstream.
The problem is that "entryptr + next_offset" and "entryptr + len + size"
can wrap. I ended up changing the type of "entryptr" because it makes
the math easier when we don't have to do so much casting.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 8ad8aa353524d89fa2e09522f3078166ff78ec42 upstream.
The "old_entry + le32_to_cpu(pDirInfo->NextEntryOffset)" can wrap
around so I have added a check for integer overflow.
Reported-by: Dr Silvio Cesare of InfoSect <silvio.cesare@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 831b624df1b420c8f9281ed1307a8db23afb72df upstream.
persistent_ram_vmap() returns the page start vaddr.
persistent_ram_iomap() supports non-page-aligned mapping.
persistent_ram_buffer_map() always adds offset-in-page to the vaddr
returned from these two functions, which causes incorrect mapping of
non-page-aligned persistent ram buffer.
By default ftrace_size is 4096 and max_ftrace_cnt is nr_cpu_ids. Without
this patch, the zone_sz in ramoops_init_przs() is 4096/nr_cpu_ids which
might not be page aligned. If the offset-in-page > 2048, the vaddr will be
in next page. If the next page is not mapped, it will cause kernel panic:
[ 0.074231] BUG: unable to handle kernel paging request at ffffa19e0081b000
...
[ 0.075000] RIP: 0010:persistent_ram_new+0x1f8/0x39f
...
[ 0.075000] Call Trace:
[ 0.075000] ramoops_init_przs.part.10.constprop.15+0x105/0x260
[ 0.075000] ramoops_probe+0x232/0x3a0
[ 0.075000] platform_drv_probe+0x3e/0xa0
[ 0.075000] driver_probe_device+0x2cd/0x400
[ 0.075000] __driver_attach+0xe4/0x110
[ 0.075000] ? driver_probe_device+0x400/0x400
[ 0.075000] bus_for_each_dev+0x70/0xa0
[ 0.075000] driver_attach+0x1e/0x20
[ 0.075000] bus_add_driver+0x159/0x230
[ 0.075000] ? do_early_param+0x95/0x95
[ 0.075000] driver_register+0x70/0xc0
[ 0.075000] ? init_pstore_fs+0x4d/0x4d
[ 0.075000] __platform_driver_register+0x36/0x40
[ 0.075000] ramoops_init+0x12f/0x131
[ 0.075000] do_one_initcall+0x4d/0x12c
[ 0.075000] ? do_early_param+0x95/0x95
[ 0.075000] kernel_init_freeable+0x19b/0x222
[ 0.075000] ? rest_init+0xbb/0xbb
[ 0.075000] kernel_init+0xe/0xfc
[ 0.075000] ret_from_fork+0x3a/0x50
Signed-off-by: Bin Yang <bin.yang@intel.com>
[kees: add comments describing the mapping differences, updated commit log]
Fixes: 24c3d2f342ed ("staging: android: persistent_ram: Make it possible to use memory outside of bootmem")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit e79e0e1428188b24c3b57309ffa54a33c4ae40c4 ]
Before this patch, you could get into situations like this:
1. Process 1 searches for X free blocks, finds them, makes a reservation
2. Process 2 searches for free blocks in the same rgrp, but now the
bitmap is full because process 1's reservation is skipped over.
So it marks the bitmap as GBF_FULL.
3. Process 1 tries to allocate blocks from its own reservation, but
since the GBF_FULL bit is set, it skips over the rgrp and searches
elsewhere, thus not using its own reservation.
This patch adds an additional check to allow processes to use their
own reservations.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 776125785a87ff05d49938bd5b9f336f2a05bff6 ]
To speed up the common case of appending to a file,
gfs2_write_alloc_required presumes that writing beyond the end of a file
will always require additional blocks to be allocated. This assumption
is incorrect for preallocates files, but there are no negative
consequences as long as *some* space is still left on the filesystem.
One special file that always has some space preallocated beyond the end
of the file is the rindex: when growing a filesystem, gfs2_grow adds one
or more new resource groups and appends records describing those
resource groups to the rindex; the preallocated space ensures that this
is always possible.
However, when a filesystem is completely full, gfs2_write_alloc_required
will indicate that an additional allocation is required, and appending
the next record to the rindex will fail even though space for that
record has already been preallocated. To fix that, skip the incorrect
optimization in gfs2_write_alloc_required, but for the rindex only.
Other writes to preallocated space beyond the end of the file are still
allowed to fail on completely full filesystems.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit 0633da48f0793aeba27f82d30605624416723a91 upstream.
autofs_sbi() does not check the superblock magic number to verify it has
been given an autofs super block.
Backport Note: autofs4 has been renamed to autofs upstream. As a result
the upstream patch does not apply cleanly onto 4.14.y.
Link: http://lkml.kernel.org/r/153475422934.17131.7563724552005298277.stgit@pluto.themaw.net
Reported-by: <syzbot+87c3c541582e56943277@syzkaller.appspotmail.com>
Signed-off-by: Ian Kent <raven@themaw.net>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Zubin Mithra <zsm@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
