Re: [PATCH v2] loop: Fix NULL pointer dereference by synchronizing lo_release and loop_queue_rq

[Ming Lei]

On Wed, May 20, 2026 at 03:36:12PM +0900, Tetsuo Handa wrote:
> On 2026/05/20 12:06, Ming Lei wrote:
> > The IO after close(loop) should be from writeback. rcu/sruc isn't necessary,
> 
> Gemini's comment is that drain_workqueue() is not sufficient for waiting for
> do_req_filebacked(REQ_OP_WRITE) requests with cmd->use_aio == true case to complete.

Anything cleared in __loop_clr_fd() is not used by lo_rw_aio_complete() & lo_complete_rq().

So why isn't drain_workqueue() enough for cmd->use_aio?


Thanks,
Ming