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linux/fs/ext4
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Jan Kara 024d8556f3 ext4: avoid writing unitialized memory to disk in EA inodes 
[ Upstream commit 65121eff3e4c8c90f8126debf3c369228691c591 ]

If the extended attribute size is not a multiple of block size, the last
block in the EA inode will have uninitialized tail which will get
written to disk. We will never expose the data to userspace but still
this is not a good practice so just zero out the tail of the block as it
isn't going to cause a noticeable performance overhead.

Fixes: e50e5129f384 ("ext4: xattr-in-inode support")
Reported-by: syzbot+9c1fe13fcb51574b249b@syzkaller.appspotmail.com
Reported-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20240613150234.25176-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-03 09:00:04 +02:00
..
.kunitconfig
ext4: add .kunitconfig fragment to enable ext4-specific tests
2021-02-11 23:16:30 -05:00
acl.c
ext4: convert to ctime accessor functions
2023-07-24 10:29:54 +02:00
acl.h
Revert "ext4: apply umask if ACL support is disabled"
2024-05-02 18:25:39 -04:00
balloc.c
ext4: add some kunit stub for mballoc kunit test
2023-10-05 22:32:16 -04:00
bitmap.c
ext4: remove useless conditional branch code
2023-04-19 23:39:08 -04:00
block_validity.c
ext4: add correct group descriptors and reserved GDT blocks to system zone
2023-08-27 11:27:12 -04:00
crypto.c
fscrypt: support crypto data unit size less than filesystem block size
2023-09-25 22:34:33 -07:00
dir.c
use ->bd_mapping instead of ->bd_inode->i_mapping
2024-05-03 02:36:51 -04:00
ext4_extents.h
ext4: fix sparse warnings
2021-08-30 23:36:50 -04:00
ext4_jbd2.c
use ->bd_mapping instead of ->bd_inode->i_mapping
2024-05-03 02:36:51 -04:00
ext4_jbd2.h
ext4: split ext4_journal_start trace for debug
2022-12-01 10:46:54 -05:00
ext4.h
ext4: use memtostr_pad() for s_volume_name
2024-07-24 15:54:05 +02:00
extents_status.c
ext4: fix infinite loop when replaying fast_commit
2024-08-03 09:00:02 +02:00
extents_status.h
ext4: make ext4_es_insert_extent() return void
2023-06-26 19:35:12 -04:00
extents.c
ext4: set the type of max_zeroout to unsigned int to avoid overflow
2024-05-02 23:48:31 -04:00
fast_commit.c
ext4: don't track ranges in fast_commit if inode has inlined data
2024-08-03 09:00:04 +02:00
fast_commit.h
ext4: add missing validation of fast-commit record lengths
2022-12-08 21:49:24 -05:00
file.c
Ext4 patches for the 6.10-rc1 merge window:
2024-05-18 14:11:54 -07:00
fsmap.c
ext4: port block device access to file
2024-02-25 12:05:26 +01:00
fsmap.h
ext4: fsmap: fix the block/inode bitmap comment
2021-06-24 09:48:29 -04:00
fsync.c
ext4: drop EXT4_MF_FS_ABORTED flag
2023-07-29 18:37:53 -04:00
hash.c
ext4: remove redundant checks of s_encoding
2023-08-27 11:27:13 -04:00
ialloc.c
ext4: convert to new timestamp accessors
2023-10-18 13:26:21 +02:00
indirect.c
ext4: remove unnecessary parameter "needed" in ext4_discard_preallocations
2024-01-18 10:52:45 -05:00
inline.c
mm: add folio_zero_tail() and use it in ext4
2023-12-10 16:51:36 -08:00
inode-test.c
ext4: convert to ctime accessor functions
2023-07-24 10:29:54 +02:00
inode.c
ext4: remove the redundant folio_wait_stable()
2024-05-07 15:48:04 -04:00
ioctl.c
ext4: use memtostr_pad() for s_volume_name
2024-07-24 15:54:05 +02:00
Kconfig
fs: add CONFIG_BUFFER_HEAD
2023-08-02 09:13:09 -06:00
Makefile
ext4: move ext4 crypto code to its own file crypto.c
2022-05-21 22:24:24 -04:00
mballoc-test.c
ext4: add test_mb_mark_used_cost to estimate cost of mb_mark_used
2024-05-03 00:12:32 -04:00
mballoc.c
ext4: fix error pointer dereference in ext4_mb_load_buddy_gfp()
2024-05-17 11:24:38 -04:00
mballoc.h
ext4: convert ac_buddy_page to ac_buddy_folio
2024-05-07 15:38:17 -04:00
migrate.c
ext4: avoid deadlock in fs reclaim with page writeback
2023-05-13 18:05:04 -04:00
mmp.c
ext4: replace read-only check for shutdown check in mmp code
2023-07-29 18:37:53 -04:00
move_extent.c
ext4: remove calls to to set/clear the folio error flag
2024-05-09 00:23:51 -04:00
namei.c
ext4: avoid excessive credit estimate in ext4_tmpfile()
2024-05-02 14:49:16 -04:00
orphan.c
ext4: remove trailing newline from ext4_msg() message
2022-12-08 21:49:23 -05:00
page-io.c
ext4: remove calls to to set/clear the folio error flag
2024-05-09 00:23:51 -04:00
readpage.c
ext4: remove calls to to set/clear the folio error flag
2024-05-09 00:23:51 -04:00
resize.c
ext4: enable meta_bg only when new desc blocks are needed
2024-03-07 13:32:54 -05:00
super.c
bd_inode series
2024-05-21 09:51:42 -07:00
symlink.c
ext4_get_link(): fix breakage in RCU mode
2024-02-25 02:10:32 -05:00
sysfs.c
ext4: add positive int attr pointer to avoid sysfs variables overflow
2024-05-02 23:48:30 -04:00
truncate.h
ext4: Convert to use mapping->invalidate_lock
2021-07-13 14:29:00 +02:00
verity.c
- Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of
2023-04-27 19:42:02 -07:00
xattr_hurd.c
fs: port xattr to mnt_idmap
2023-01-19 09:24:28 +01:00
xattr_security.c
fs: port xattr to mnt_idmap
2023-01-19 09:24:28 +01:00
xattr_trusted.c
fs: port xattr to mnt_idmap
2023-01-19 09:24:28 +01:00
xattr_user.c
fs: port xattr to mnt_idmap
2023-01-19 09:24:28 +01:00
xattr.c
ext4: avoid writing unitialized memory to disk in EA inodes
2024-08-03 09:00:04 +02:00
xattr.h
ext4: move ext4_xattr_handlers to .rodata
2023-10-09 16:24:16 +02:00