https://syzkaller.appspot.com/bug?extid=d98fd19acd08b36ff422 [PATCH fs/bfs 1/2] bfs: fix null-ptr-deref in bfs_move_block [PATCH fs/bfs 2/2] bfs: add buffer_uptodate check before mark_buffer_dirty
https://syzkaller.appspot.com/bug?extid=d98fd19acd08b36ff422 [PATCH fs/bfs 1/2] bfs: fix null-ptr-deref in bfs_move_block [PATCH fs/bfs 2/2] bfs: add buffer_uptodate check before mark_buffer_dirty