From: Christian A. Ehrhardt Date: Sat, 6 Jun 2026 20:11:20 +0000 (+0200) Subject: io_uring/wait: fix min_timeout behavior X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=29fe1bd01b99714f3136f922230a643c2742cda9;p=thirdparty%2Fkernel%2Flinux.git io_uring/wait: fix min_timeout behavior The wakeup condition if a min timeout is present and has expired is that at least _one_ CQE was posted. Thus set the cq_tail target to ->cq_min_tail + 1. Without this commit a spurious wakeup can result in a premature wakeup because io_should_wake() will return true even if _no_ CQE was posted at all. Cc: Tip ten Brink Fixes: e15cb2200b93 ("io_uring: fix min_wait wakeups for SQPOLL") Cc: stable@vger.kernel.org Signed-off-by: Christian A. Ehrhardt Link: https://patch.msgid.link/20260606201120.1441447-1-lk@c--e.de Signed-off-by: Jens Axboe --- diff --git a/io_uring/wait.c b/io_uring/wait.c index ec01e78a216d..d005ea17b35f 100644 --- a/io_uring/wait.c +++ b/io_uring/wait.c @@ -103,7 +103,7 @@ static enum hrtimer_restart io_cqring_min_timer_wakeup(struct hrtimer *timer) } /* any generated CQE posted past this time should wake us up */ - iowq->cq_tail = iowq->cq_min_tail; + iowq->cq_tail = iowq->cq_min_tail + 1; hrtimer_update_function(&iowq->t, io_cqring_timer_wakeup); hrtimer_set_expires(timer, iowq->timeout);