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linux/fs/ext4
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Theodore Ts'o ffa9206a62 ext4: avoid race conditions when remounting with options that change dax 
[ Upstream commit 829b37b8cddb1db75c1b7905505b90e593b15db1 ]

Trying to change dax mount options when remounting could allow mount
options to be enabled for a small amount of time, and then the mount
option change would be reverted.

In the case of "mount -o remount,dax", this can cause a race where
files would temporarily treated as DAX --- and then not.

Cc: stable@kernel.org
Reported-by: syzbot+bca9799bf129256190da@syzkaller.appspotmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-06-24 17:50:48 +02:00
..
acl.c
ext4: compare old and new mode before setting update_mode flag
2018-12-10 00:22:38 -05:00
acl.h
ext4: fix up remaining files with SPDX cleanups
2017-12-17 22:00:59 -05:00
balloc.c
ext4: fix potential race between online resizing and write operations
2020-02-28 17:22:22 +01:00
bitmap.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
block_validity.c
ext4: add cond_resched() to ext4_protect_reserved_inode
2020-02-19 19:52:59 +01:00
dir.c
ext4: avoid utf8_strncasecmp() with unstable name
2020-06-24 17:50:48 +02:00
ext4_extents.h
ext4: fix EXT_MAX_EXTENT/INDEX to check for zeroed eh_max
2020-06-22 09:31:15 +02:00
ext4_jbd2.c
ext4: shutdown should not prevent get_write_access
2018-02-18 22:07:36 -05:00
ext4_jbd2.h
ext4: use jbd2_inode dirty range scoping
2019-06-20 17:26:26 -04:00
ext4.h
ext4: fix race between writepages and enabling EXT4_EXTENTS_FL
2020-02-28 17:22:23 +01:00
extents_status.c
ext4: use percpu_counters for extent_status cache hits/misses
2019-08-28 11:19:23 -04:00
extents_status.h
ext4: use percpu_counters for extent_status cache hits/misses
2019-08-28 11:19:23 -04:00
extents.c
ext4: fix partial cluster initialization when splitting extent
2020-06-24 17:50:47 +02:00
file.c
ext4: fix ext4_dax_read/write inode locking sequence for IOCB_NOWAIT
2020-02-24 08:36:24 +01:00
fsmap.c
ext4: fix miscellaneous sparse warnings
2019-05-12 04:49:47 -04:00
fsmap.h
ext4: fix up remaining files with SPDX cleanups
2017-12-17 22:00:59 -05:00
fsync.c
ext4: fix race between ext4_sync_parent() and rename()
2020-06-22 09:31:16 +02:00
hash.c
ext4: fix kernel oops caused by spurious casefold flag
2019-09-03 01:43:17 -04:00
ialloc.c
ext4: increase wait time needed before reuse of deleted inode numbers
2020-05-02 08:48:59 +02:00
indirect.c
ext4: clean up kerneldoc warnigns when building with W=1
2019-06-19 16:30:03 -04:00
inline.c
ext4: set error return correctly when ext4_htree_store_dirent fails
2019-08-12 14:29:38 -04:00
inode.c
ext4: use matching invalidatepage in ext4_writepage
2020-05-02 08:48:58 +02:00
ioctl.c
Added new ext4 debugging ioctls to allow userspace to get information
2019-09-21 13:37:39 -07:00
Kconfig
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
Makefile
ext4: add basic fs-verity support
2019-08-12 19:33:50 -07:00
mballoc.c
ext4: convert BUG_ON's to WARN_ON's in mballoc.c
2020-05-02 08:48:59 +02:00
mballoc.h
ext4: fix up remaining files with SPDX cleanups
2017-12-17 22:00:59 -05:00
migrate.c
ext4: fix race between writepages and enabling EXT4_EXTENTS_FL
2020-02-28 17:22:23 +01:00
mmp.c
ext4: don't assume that mmp_nodename/bdevname have NUL
2020-02-19 19:52:58 +01:00
move_extent.c
ext4: use jbd2_inode dirty range scoping
2019-06-20 17:26:26 -04:00
namei.c
ext4: add cond_resched() to __ext4_find_entry()
2020-02-28 17:22:22 +01:00
page-io.c
ext4: fix deadlock allocating crypto bounce page from mempool
2020-02-11 04:35:32 -08:00
readpage.c
ext4: fix deadlock allocating bio_post_read_ctx from mempool
2020-02-24 08:36:29 +01:00
resize.c
ext4: fix potential race between s_flex_groups online resizing and access
2020-02-28 17:22:22 +01:00
super.c
ext4: avoid race conditions when remounting with options that change dax
2020-06-24 17:50:48 +02:00
symlink.c
ext4: switch to fscrypt_get_symlink()
2018-01-11 22:10:40 -05:00
sysfs.c
ext4: add basic fs-verity support
2019-08-12 19:33:50 -07:00
truncate.h
ext4: handle layout changes to pinned DAX mappings
2018-07-29 17:00:22 -04:00
verity.c
ext4: add basic fs-verity support
2019-08-12 19:33:50 -07:00
xattr_security.c
ext4: use XATTR_CREATE in ext4_initxattrs()
2018-05-10 11:52:14 -04:00
xattr_trusted.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xattr_user.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xattr.c
ext4: fix error pointer dereference
2020-06-22 09:31:15 +02:00
xattr.h
ext4: add extra checks to ext4_xattr_block_get()
2018-03-30 20:04:11 -04:00