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| author | Jingbo Xu <jefflexu@linux.alibaba.com> | 2023-11-14 10:07:04 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2023-11-17 14:55:46 +0300 |
| commit | 8bd90b6ae7856dd5000b75691d905b39b9ea5d6b (patch) | |
| tree | 92de1bf8ff689fbe950102b1a5d2ae47bbb12fb7 /fs/cachefiles | |
| parent | 914fa861e3d7803c9bbafc229652c2a69edb8b60 (diff) | |
| download | linux-8bd90b6ae7856dd5000b75691d905b39b9ea5d6b.tar.xz | |
erofs: fix NULL dereference of dif->bdev_handle in fscache mode
Avoid NULL dereference of dif->bdev_handle, as dif->bdev_handle is NULL
in fscache mode.
BUG: kernel NULL pointer dereference, address: 0000000000000000
RIP: 0010:erofs_map_dev+0xbd/0x1c0
Call Trace:
<TASK>
erofs_fscache_data_read_slice+0xa7/0x340
erofs_fscache_data_read+0x11/0x30
erofs_fscache_readahead+0xd9/0x100
read_pages+0x47/0x1f0
page_cache_ra_order+0x1e5/0x270
filemap_get_pages+0xf2/0x5f0
filemap_read+0xb8/0x2e0
vfs_read+0x18d/0x2b0
ksys_read+0x53/0xd0
do_syscall_64+0x42/0xf0
entry_SYSCALL_64_after_hwframe+0x6e/0x76
Reported-by: Yiqun Leng <yqleng@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=7245
Fixes: 49845720080d ("erofs: Convert to use bdev_open_by_path()")
Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Reviewed-by: Yue Hu <huyue2@coolpad.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Link: https://lore.kernel.org/r/20231114070704.23398-1-jefflexu@linux.alibaba.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/cachefiles')
0 files changed, 0 insertions, 0 deletions