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authorJens Axboe <axboe@kernel.dk>2021-03-26 17:57:10 +0300
committerJens Axboe <axboe@kernel.dk>2021-03-27 01:10:14 +0300
commit10442994ba195efef6fdcc0c3699e4633cb5161b (patch)
tree9a500ecc3cad53fdd20db9fc3b3c0855896dbd96 /kernel
parent90b8749022bbdd0c94a13182a78f4903b98fd0d7 (diff)
downloadlinux-10442994ba195efef6fdcc0c3699e4633cb5161b.tar.xz
kernel: don't call do_exit() for PF_IO_WORKER threads
Right now we're never calling get_signal() from PF_IO_WORKER threads, but in preparation for doing so, don't handle a fatal signal for them. The workers have state they need to cleanup when exiting, so just return instead of calling do_exit() on their behalf. The threads themselves will detect a fatal signal and do proper shutdown. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/signal.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index f2a1b898da29..d22177d37b21 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2772,13 +2772,21 @@ relock:
}
/*
+ * PF_IO_WORKER threads will catch and exit on fatal signals
+ * themselves. They have cleanup that must be performed, so
+ * we cannot call do_exit() on their behalf.
+ */
+ if (current->flags & PF_IO_WORKER)
+ goto out;
+
+ /*
* Death signals, no core dump.
*/
do_group_exit(ksig->info.si_signo);
/* NOTREACHED */
}
spin_unlock_irq(&sighand->siglock);
-
+out:
ksig->sig = signr;
if (!(ksig->ka.sa.sa_flags & SA_EXPOSE_TAGBITS))