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| author | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-12-05 23:00:50 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-12-07 10:56:31 +0800 |
| commit | c505feba4c0d76084e56ec498ce819f02a7043ae (patch) | |
| tree | e6e3c5d70ced553c0342124ed799a576dd960aa2 /fs/affs | |
| parent | d5d188b8f8b38d3d71dd05993874b4fc9284ce95 (diff) | |
erofs: validate the extent length for uncompressed pclusters
syzkaller reported a KASAN use-after-free:
https://syzkaller.appspot.com/bug?extid=2ae90e873e97f1faf6f2
The referenced fuzzed image actually has two issues:
- m_pa == 0 as a non-inlined pcluster;
- The logical length is longer than its physical length.
The first issue has already been addressed. This patch addresses
the second issue by checking the extent length validity.
Reported-by: syzbot+2ae90e873e97f1faf6f2@syzkaller.appspotmail.com
Fixes: 02827e1796b3 ("staging: erofs: add erofs_map_blocks_iter")
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20221205150050.47784-2-hsiangkao@linux.alibaba.com
Diffstat (limited to 'fs/affs')
0 files changed, 0 insertions, 0 deletions