* [PATCH] io-wq: ensure we exit if thread group is exiting
@ 2021-09-22 14:49 Jens Axboe
0 siblings, 0 replies; only message in thread
From: Jens Axboe @ 2021-09-22 14:49 UTC (permalink / raw)
To: io-uring
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 <david@fromorbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
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 @@ static int io_wqe_worker(void *data)
if (!get_signal(&ksig))
continue;
- if (fatal_signal_pending(current))
+ if (fatal_signal_pending(current) ||
+ signal_group_exit(current->signal))
break;
continue;
}
--
Jens Axboe
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