Commit 7c977a58 authored by Jens Axboe's avatar Jens Axboe
Browse files

io_uring: don't attempt IO reissue from the ring exit path 



If we're exiting the ring, just let the IO fail with -EAGAIN as nobody
will care anyway. It's not the right context to reissue from.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 8e5c66c4

fs/io_uring.c

+7 −0
Original line number Diff line number Diff line
@@ -2839,6 +2839,13 @@ static bool io_rw_reissue(struct io_kiocb *req) 
		return false;

	if ((req->flags & REQ_F_NOWAIT) || io_wq_current_is_worker())

		return false;

	/*

	 * If ref is dying, we might be running poll reap from the exit work.

	 * Don't attempt to reissue from that path, just let it fail with

	 * -EAGAIN.

	 */

	if (percpu_ref_is_dying(&req->ctx->refs))

		return false;



	lockdep_assert_held(&req->ctx->uring_lock);