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linux/fs/ext4
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Jan Kara 62adae8f26 ext4: fix crashes in dioread_nolock mode 
[ Upstream commit 74dae42785 ]

Competing overwrite DIO in dioread_nolock mode will just overwrite
pointer to io_end in the inode. This may result in data corruption or
extent conversion happening from IO completion interrupt because we
don't properly set buffer_defer_completion() when unlocked DIO races
with locked DIO to unwritten extent.

Since unlocked DIO doesn't need io_end for anything, just avoid
allocating it and corrupting pointer from inode for locked DIO.
A cleaner fix would be to avoid these games with io_end pointer from the
inode but that requires more intrusive changes so we leave that for
later.

Cc: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
History 2016-03-04 10:25:45 -05:00
..
acl.c ext4: remove unused header files 2015-04-02 23:47:42 -04:00
acl.h ext2/3/4: use generic posix ACL infrastructure 2014-01-25 23:58:19 -05:00
balloc.c ext4: remove unnecessary lock/unlock of i_block_reservation_lock 2015-04-03 00:02:53 -04:00
bitmap.c ext4: remove unused header files 2015-04-02 23:47:42 -04:00
block_validity.c ext4: remove unused header files 2015-04-02 23:47:42 -04:00
crypto.c ext4 crypto: add ext4 encryption facilities 2015-04-12 00:43:56 -04:00
crypto_fname.c ext4 crypto: add padding to filenames before encrypting 2015-05-01 16:56:50 -04:00
crypto_key.c ext4 crypto: add padding to filenames before encrypting 2015-05-01 16:56:50 -04:00
crypto_policy.c ext4 crypto: add padding to filenames before encrypting 2015-05-01 16:56:50 -04:00
dir.c ext4 crypto: simplify and speed up filename encryption 2015-05-01 16:56:45 -04:00
ext4.h ext4: remove unused function prototype from ext4.h 2015-05-14 18:43:36 -04:00
ext4_crypto.h ext4 crypto: add padding to filenames before encrypting 2015-05-01 16:56:50 -04:00
ext4_extents.h ext4: teach ext4_ext_find_extent() to realloc path if necessary 2014-09-01 14:40:09 -04:00
ext4_jbd2.c ext4: fix potential use after free in __ext4_journal_stop 2015-12-14 21:24:35 -08:00
ext4_jbd2.h ext4: don't use MAXQUOTAS value 2014-09-11 11:15:15 -04:00
extents.c ext4: avoid deadlocks in the writeback path by using sb_getblk_gfp 2015-08-03 09:29:00 -07:00
extents_status.c ext4: fix data corruption caused by unwritten and delayed extents 2015-05-02 21:36:55 -04:00
extents_status.h ext4: introduce aging to extent status tree 2014-11-25 11:55:24 -05:00
file.c A few bug fixes and add support for file-system level encryption in ext4. 2015-04-19 14:26:31 -07:00
fsync.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-26 17:22:07 -07:00
hash.c ext4: remove unused header files 2015-04-02 23:47:42 -04:00
ialloc.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-26 17:22:07 -07:00
indirect.c ext4: don't retry file block mapping on bigalloc fs with non-extent file 2015-08-03 09:28:59 -07:00
inline.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-26 17:22:07 -07:00
inode.c ext4: fix crashes in dioread_nolock mode 2016-03-04 10:25:45 -05:00
ioctl.c ext4 crypto: add encryption policy and password salt support 2015-04-11 07:48:01 -04:00
Kconfig ext4 crypto: do not select from EXT4_FS_ENCRYPTION 2015-05-02 10:29:19 -04:00
Makefile ext4 crypto: filename encryption facilities 2015-04-12 00:56:17 -04:00
mballoc.c ext4: replace open coded nofail allocation in ext4_free_blocks() 2015-08-03 09:29:00 -07:00
mballoc.h ext4: remove unused ac_ex_scanned 2014-02-20 13:32:10 -05:00
migrate.c ext4: correctly migrate a file with a hole at the beginning 2015-08-03 09:29:00 -07:00
mmp.c ext4: Replace open coded mdata csum feature to helper function 2014-10-13 03:36:16 -04:00
move_extent.c ext4: don't read blocks from disk after extents being swapped 2016-03-04 10:25:42 -05:00
namei.c Some miscellaneous bug fixes and some final on-disk and ABI changes 2015-05-03 18:23:53 -07:00
page-io.c ext4 crypto: fix memory leak in ext4_bio_write_page() 2015-12-14 21:24:35 -08:00
readpage.c ext4 crypto: implement the ext4 decryption read path 2015-04-12 00:56:10 -04:00
resize.c ext4: fix potential integer overflow 2016-03-04 10:25:42 -05:00
super.c ext4, jbd2: ensure entering into panic after recording an error in superblock 2015-12-14 21:24:35 -08:00
symlink.c Some miscellaneous bug fixes and some final on-disk and ABI changes 2015-05-03 18:23:53 -07:00
truncate.h ext4: move common truncate functions to header file 2011-06-27 19:16:04 -04:00
xattr.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-04-26 17:22:07 -07:00
xattr.h ext4 crypto: add encryption xattr support 2015-04-11 07:47:00 -04:00
xattr_security.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
xattr_trusted.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00
xattr_user.c VFS: normal filesystems (and lustre): d_inode() annotations 2015-04-15 15:06:57 -04:00