[PATCH v2] erofs: fix general protection fault when reading fragment

[Chao Yu]

On 2022/10/21 16:53, Yue Hu wrote:
> From: Yue Hu <huyue2 at coolpad.com>
> 
> As syzbot reported [1], the fragment feature sb flag is not set, so
> packed_inode != NULL needs to be checked in z_erofs_read_fragment().
> 
> [1] https://lore.kernel.org/all/0000000000002e7a8905eb841ddd@google.com/
> 
> Reported-by: syzbot+3faecbfd845a895c04cb at syzkaller.appspotmail.com
> Fixes: 08a0c9ef3e7e ("erofs: support on-disk compressed fragments data")
> Signed-off-by: Yue Hu <huyue2 at coolpad.com>

Reviewed-by: Chao Yu <chao at kernel.org>

Thanks,