diff options
| author | Ryusuke Konishi <konishi.ryusuke@gmail.com> | 2024-09-04 17:13:09 +0900 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-09 16:47:42 -0700 |
| commit | f9c96351aa6718b42a9f42eaf7adce0356bdb5e8 (patch) | |
| tree | b98eb5c348804981b003f4ef19c644d5b064ada8 /rust/kernel/error.rs | |
| parent | 111b812d3662f3a1b831d19208f83aa711583fe6 (diff) | |
nilfs2: fix potential oob read in nilfs_btree_check_delete()
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: 17c76b0104e4 ("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>
Diffstat (limited to 'rust/kernel/error.rs')
0 files changed, 0 insertions, 0 deletions