On 2023/11/14 15:07, Jingbo Xu wrote:
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 <yql...@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 <jeffl...@linux.alibaba.com>
Reviewed-by: Chao Yu <c...@kernel.org>
Thanks,
