From 87c1696655787895689618c8b63c5efe66b8f2ab Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Tue, 21 Sep 2021 08:24:57 -0600 Subject: [PATCH] io-wq: ensure we exit if thread group is exiting Dave reports that a coredumping workload gets stuck in 5.15-rc2, and identified the culprit in the Fixes line below. The problem is that relying solely on fatal_signal_pending() to gate whether to exit or not fails miserably if a process gets eg SIGILL sent. Don't exclusively rely on fatal signals, also check if the thread group is exiting. Fixes: 15e20db2e0ce ("io-wq: only exit on fatal signals") Reported-by: Dave Chinner Signed-off-by: Jens Axboe --- fs/io-wq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/io-wq.c b/fs/io-wq.c index c2e0e8e80949..c2360cdc403d 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -584,7 +584,8 @@ loop: if (!get_signal(&ksig)) continue; - if (fatal_signal_pending(current)) + if (fatal_signal_pending(current) || + signal_group_exit(current->signal)) break; continue; }