Commit bc674a04 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring/zcrx: recheck ifq on shutdown 



io_ring_exit_work() checks ifq before shutting it down and guarantees
that the pointer is stable, but instead of relying on rather complicated
synchronisation recheck the ifq pointer inside.

Reported-by: default avatarKees Bakker <kees@ijzerbout.nl>
Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/905e55c47235ab26377a735294f939f31d00ae53.1739934175.git.asml.silence@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 71082faa

io_uring/zcrx.c

+3 −3
Original line number Diff line number Diff line
@@ -489,9 +489,9 @@ void io_shutdown_zcrx_ifqs(struct io_ring_ctx *ctx) 
{

	lockdep_assert_held(&ctx->uring_lock);



	if (ctx->ifq)

	if (!ctx->ifq)

		return;

	io_zcrx_scrub(ctx->ifq);



	io_close_queue(ctx->ifq);

}