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linux/fs/nilfs2
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Ryusuke Konishi c4f8554996 nilfs2: fix potential oob read in nilfs_btree_check_delete() 
[ Upstream commit f9c96351aa ]

The function nilfs_btree_check_delete(), which checks whether degeneration
to direct mapping occurs before deleting a b-tree entry, causes memory
access outside the block buffer when retrieving the maximum key if the
root node has no entries.

This does not usually happen because b-tree mappings with 0 child nodes
are never created by mkfs.nilfs2 or nilfs2 itself.  However, it can happen
if the b-tree root node read from a device is configured that way, so fix
this potential issue by adding a check for that case.

Link: https://lkml.kernel.org/r/20240904081401.16682-4-konishi.ryusuke@gmail.com
Fixes: 17c76b0104 ("nilfs2: B-tree based block mapping")
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: Lizhi Xu <lizhi.xu@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-10-17 15:10:58 +02:00
..
alloc.c nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-18 13:07:36 +02:00
alloc.h nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-18 13:07:36 +02:00
bmap.c nilfs2: fix infinite loop in nilfs_mdt_get_block() 2023-05-11 23:00:39 +09:00
bmap.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
btnode.c nilfs2: handle inconsistent state in nilfs_btnode_create_block() 2024-08-19 05:45:22 +02:00
btnode.h nilfs2: fix lockdep warnings in page operations for btree nodes 2022-05-25 09:57:26 +02:00
btree.c nilfs2: fix potential oob read in nilfs_btree_check_delete() 2024-10-17 15:10:58 +02:00
btree.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
cpfile.c nilfs2: fix typos in comments 2021-05-06 19:24:13 -07:00
cpfile.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
dat.c nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-18 13:07:36 +02:00
dat.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
dir.c nilfs2: fix kernel bug on rename operation of broken directory 2024-07-18 13:07:43 +02:00
direct.c nilfs2: fix failure to detect DAT corruption in btree and direct mappings 2024-04-10 16:18:42 +02:00
direct.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
export.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
file.c nilfs2: fix hang in nilfs_lookup_dirty_data_buffers() 2024-02-23 08:55:08 +01:00
gcinode.c nilfs2: fix potential use after free in nilfs_gccache_submit_read_data() 2023-10-06 13:18:21 +02:00
ifile.c nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-18 13:07:36 +02:00
ifile.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
inode.c nilfs2: prevent kernel bug at submit_bh_wbc() 2024-04-10 16:18:43 +02:00
ioctl.c nilfs2: fix out-of-range warning 2024-06-16 13:39:16 +02:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mdt.c nilfs2: fix lockdep warnings during disk space reclamation 2022-05-25 09:57:26 +02:00
mdt.h nilfs2: fix lockdep warnings during disk space reclamation 2022-05-25 09:57:26 +02:00
namei.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2021-05-02 09:14:01 -07:00
nilfs.h nilfs2: add missing check for inode numbers on directory entries 2024-07-18 13:07:32 +02:00
page.c nilfs2: prevent general protection fault in nilfs_clear_dirty_page() 2023-06-28 10:29:45 +02:00
page.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
recovery.c nilfs2: fix missing cleanup on rollforward recovery error 2024-09-12 11:07:44 +02:00
segbuf.c nilfs2: fix buffer corruption due to concurrent device reads 2023-06-28 10:29:42 +02:00
segbuf.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
segment.c nilfs2: fix state management in error path of log writing function 2024-09-12 11:07:44 +02:00
segment.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
sufile.c nilfs2: prevent WARNING in nilfs_sufile_set_segment_usage() 2023-12-13 18:36:43 +01:00
sufile.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
super.c nilfs2: fix buffer corruption due to concurrent device reads 2023-06-28 10:29:42 +02:00
sysfs.c nilfs2: protect references to superblock parameters exposed in sysfs 2024-09-12 11:07:52 +02:00
sysfs.h nilfs2: convert to SPDX license tags 2018-09-04 16:45:02 -07:00
the_nilfs.c nilfs2: fix inode number range checks 2024-07-18 13:07:32 +02:00
the_nilfs.h nilfs2: fix inode number range checks 2024-07-18 13:07:32 +02:00