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author | Chao Yu | 2020-03-23 17:43:04 +0800 |
---|---|---|
committer | Jaegeuk Kim | 2020-03-30 20:46:25 -0700 |
commit | 79bbefb19f1359fb2cbd144d5a054649e7e583be (patch) | |
tree | 26a75c709f304b8ba73f135a0741abf15549b6b0 /fs/omfs | |
parent | 23c51bed6f5d21aeebeaf9cdcd63ac3d3cbd0f83 (diff) |
f2fs: fix NULL pointer dereference in f2fs_verity_work()
If both compression and fsverity feature is on, generic/572 will
report below NULL pointer dereference bug.
BUG: kernel NULL pointer dereference, address: 0000000000000018
RIP: 0010:f2fs_verity_work+0x60/0x90 [f2fs]
#PF: supervisor read access in kernel mode
Workqueue: fsverity_read_queue f2fs_verity_work [f2fs]
RIP: 0010:f2fs_verity_work+0x60/0x90 [f2fs]
Call Trace:
process_one_work+0x16c/0x3f0
worker_thread+0x4c/0x440
? rescuer_thread+0x350/0x350
kthread+0xf8/0x130
? kthread_unpark+0x70/0x70
ret_from_fork+0x35/0x40
There are two issue in f2fs_verity_work():
- it needs to traverse and verify all pages in bio.
- if pages in bio belong to non-compressed cluster, accessing
decompress IO context stored in page private will cause NULL
pointer dereference.
Fix them.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/omfs')
0 files changed, 0 insertions, 0 deletions