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Qu Wenruo f88b40c147 btrfs: check-integrity: Fix NULL pointer dereference for degraded mount 
[ Upstream commit 9912bbf6440ba0555e91d3306520da01872c7c1d ]

Commit f8f84b2dfda5 ("btrfs: index check-integrity state hash by a dev_t")
changed how btrfsic indexes device state.

Now we need to access device->bdev->bd_dev, while for degraded mount
it's completely possible to have device->bdev as NULL, thus it will
trigger a NULL pointer dereference at mount time.

Fix it by checking if the device is degraded before accessing
device->bdev->bd_dev.

There are a lot of other places accessing device->bdev->bd_dev, however
the other call sites have either checked device->bdev, or the
device->bdev is passed from btrfsic_map_block(), so it won't cause harm.

Fixes: f8f84b2dfda5 ("btrfs: index check-integrity state hash by a dev_t")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-09-15 09:46:55 +02:00
..
9p
fs/9p/xattr.c: catch the error of p9_client_clunk when setting xattr failed
2018-09-09 10:32:33 +02:00
adfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
affs
affs: fix potential memory leak when parsing option 'prefix'
2018-05-28 12:36:41 +02:00
afs
Merge branch 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:32:04 +09:00
autofs
autofs: fix slab out of bounds read in getname_kernel()
2018-07-14 11:11:09 -07:00
befs
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
bfs
bfs_add_entry: pass name/len as qstr pointer
2018-05-22 14:27:50 -04:00
btrfs
btrfs: check-integrity: Fix NULL pointer dereference for degraded mount
2018-09-15 09:46:55 +02:00
cachefiles
cachefiles: Wait rather than BUG'ing on "Unexpected object collision"
2018-07-25 14:49:00 +01:00
ceph
ceph: fix dentry leak in splice_dentry()
2018-06-26 18:42:44 +02:00
cifs
smb3: if server does not support posix do not allow posix mount option
2018-09-15 09:46:54 +02:00
coda
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
configfs
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
cramfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
crypto
f2fs-for-4.18-rc1
2018-06-11 10:16:13 -07:00
debugfs
Revert "debugfs: inode: debugfs_create_dir uses mode permission from parent"
2018-06-12 20:52:16 -07:00
devpts
…
dlm
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
ecryptfs
Merge branch 'fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into aio-base
2018-05-26 09:16:25 +02:00
efivarfs
…
efs
…
exofs
exofs: avoid VLA in structures
2018-06-15 07:55:24 +09:00
exportfs
ovl: do not try to reconnect a disconnected origin dentry
2018-04-12 12:04:49 +02:00
ext2
ext2: add warning when specifying nocheck option
2018-06-20 11:04:26 +02:00
ext4
ext4: fix race when setting the bitmap corrupted flag
2018-09-05 09:29:46 +02:00
f2fs
f2fs: fix to clear PG_checked flag in set_page_dirty()
2018-09-15 09:46:51 +02:00
fat
fat: validate ->i_start before using
2018-09-15 09:46:46 +02:00
freevxfs
freevxfs_lookup(): use d_splice_alias()
2018-05-22 14:27:51 -04:00
fscache
fscache: Fix reference overput in fscache_attach_object() error handling
2018-07-25 14:49:00 +01:00
fuse
fuse: Add missed unlock_page() to fuse_readpages_fill()
2018-09-05 09:29:49 +02:00
gfs2
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
hfs
hfs: prevent crash on exit from failed search
2018-09-15 09:46:45 +02:00
hfsplus
hfsplus: fix NULL dereference in hfsplus_lookup()
2018-09-15 09:46:46 +02:00
hostfs
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
hpfs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
hugetlbfs
mm: use vma_init() to initialize VMAs on stack and data segments
2018-07-26 19:38:03 -07:00
isofs
isofs: fix potential memory leak in mount option parsing
2018-04-16 09:47:41 +02:00
jbd2
Bug fixes for ext4; most of which relate to vulnerabilities where a
2018-07-08 11:10:30 -07:00
jffs2
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
jfs
jfs: Fix usercopy whitelist for inline inode data
2018-08-04 07:53:46 -07:00
kernfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
lockd
nfsd: fix leaked file lock with nfs exported overlayfs
2018-09-09 10:32:38 +02:00
minix
minix_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
nfs
NFSv4: Fix error handling in nfs4_sp4_select_mode()
2018-09-15 09:46:52 +02:00
nfs_common
…
nfsd
nfsd: fix leaked file lock with nfs exported overlayfs
2018-09-09 10:32:38 +02:00
nilfs2
do d_instantiate/unlock_new_inode combinations safely
2018-05-11 15:36:37 -04:00
nls
…
notify
fsnotify: add fsnotify_add_inode_mark() wrappers
2018-05-18 14:58:22 +02:00
ntfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
ocfs2
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
omfs
omfs_lookup(): report IO errors, use d_splice_alias()
2018-05-22 14:27:58 -04:00
openpromfs
openpromfs: switch to d_splice_alias()
2018-05-22 14:27:57 -04:00
orangefs
Solve a series of broken links for files under Documentation:
2018-06-17 05:25:18 +09:00
overlayfs
ovl: fix wrong use of impure dir cache in ovl_iterate()
2018-09-09 10:32:36 +02:00
proc
fs/proc/kcore.c: use __pa_symbol() for KCORE_TEXT list entries
2018-09-15 09:46:46 +02:00
pstore
pstore: Remove bogus format string definition
2018-06-14 14:57:24 +02:00
qnx4
qnx4_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
qnx6
qnx6_lookup: switch to d_splice_alias()
2018-05-22 14:27:54 -04:00
quota
fs/quota: Fix spectre gadget in do_quotactl
2018-09-09 10:32:42 +02:00
ramfs
…
reiserfs
reiserfs: change j_timestamp type to time64_t
2018-09-15 09:46:45 +02:00
romfs
romfs_lookup: switch to d_splice_alias()
2018-05-22 14:27:55 -04:00
squashfs
Squashfs: Compute expected length from inode size rather than block length
2018-08-02 09:34:02 -07:00
sysfs
scsi: sysfs: Introduce sysfs_{un,}break_active_protection()
2018-09-05 09:29:54 +02:00
sysv
sysv_lookup: use d_splice_alias()
2018-05-22 14:27:53 -04:00
tracefs
…
ubifs
ubifs: Fix synced_i_size calculation for xattr inodes
2018-09-09 10:32:40 +02:00
udf
udf: Fix mounting of Win7 created UDF filesystems
2018-09-09 10:32:42 +02:00
ufs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
xfs
xfs: properly handle free inodes in extent hint validators
2018-07-24 11:34:52 -07:00
aio.c
Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-07-22 12:04:51 -07:00
anon_inodes.c
…
attr.c
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
bad_inode.c
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
binfmt_aout.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_elf_fdpic.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
binfmt_elf.c
fs, elf: make sure to page align bss in load_elf_library
2018-07-14 11:11:10 -07:00
binfmt_em86.c
…
binfmt_flat.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_misc.c
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
binfmt_script.c
…
block_dev.c
for-linus-20180727
2018-07-27 12:51:00 -07:00
buffer.c
fs: move page_cache_seek_hole_data to iomap.c
2018-06-01 18:37:33 -07:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
autofs: clean up includes
2018-06-07 17:34:40 -07:00
compat.c
ncpfs: remove compat functionality
2018-06-05 19:23:26 +02:00
coredump.c
…
d_path.c
…
dax.c
libnvdimm for 4.18
2018-06-08 17:21:52 -07:00
dcache.c
fs/dcache.c: fix kmemcheck splat at take_dentry_name_snapshot()
2018-09-15 09:46:47 +02:00
dcookies.c
…
direct-io.c
block: consistently use GFP_NOIO instead of __GFP_NORECLAIM
2018-05-14 08:55:18 -06:00
drop_caches.c
…
eventfd.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
eventpoll.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
exec.c
mm: fix vma_is_anonymous() false-positives
2018-07-26 19:38:03 -07:00
fcntl.c
mm: restructure memfd code
2018-06-07 17:34:35 -07:00
fhandle.c
…
file_table.c
…
file.c
…
filesystems.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
bdi: Fix oops in wb_workfn()
2018-05-03 16:11:37 -06:00
inode.c
Fix up non-directory creation in SGID directories
2018-07-05 12:36:36 -07:00
internal.h
drm_mode_create_lease_ioctl(): fix open-coded filp_clone_open()
2018-07-10 23:29:03 -04:00
ioctl.c
fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems
2018-05-24 12:04:28 -05:00
iomap.c
fs: fix iomap_bmap position calculation
2018-08-02 13:09:27 -07:00
Kconfig
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
Kconfig.binfmt
docs: Fix more broken references
2018-06-15 18:11:26 -03:00
libfs.c
…
locks.c
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
Makefile
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
mbcache.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
mount.h
…
mpage.c
…
namei.c
Merge branch 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:32:04 +09:00
namespace.c
fix __legitimize_mnt()/mntput() race
2018-08-09 17:51:32 -04:00
no-block.c
…
nsfs.c
…
open.c
Revert "fs: fold open_check_o_direct into do_dentry_open"
2018-06-03 10:58:23 -07:00
pipe.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
pnode.c
…
pnode.h
…
posix_acl.c
…
proc_namespace.c
…
read_write.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
readdir.c
…
select.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
seq_file.c
proc: fix smaps and meminfo alignment
2018-05-25 18:12:11 -07:00
signalfd.c
Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:21:50 +09:00
splice.c
Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:21:50 +09:00
stack.c
…
stat.c
…
statfs.c
…
super.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-04 10:14:28 -07:00
sync.c
…
timerfd.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
userfaultfd.c
userfaultfd: remove uffd flags from vma->vm_flags if UFFD_EVENT_FORK fails
2018-08-02 16:03:40 -07:00
utimes.c
…
xattr.c
getxattr: use correct xattr length
2018-09-09 10:32:41 +02:00