printk: Don't WARN on kthread_run failure.

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Since __kthread_create_on_node() returns -EINTR upon SIGKILL,
we should not use WARN_ON() in order to catch kthread_run() failure.

Reported-by: syzbot+1ebbc20f223b99446034@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=1ebbc20f223b99446034
Fixes: 5f53ca3ff8 ("printk: Implement legacy printer kthread for PREEMPT_RT")
Fixes: 76f258bf3f ("printk: nbcon: Introduce printer kthreads")
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://patch.msgid.link/76bb4c1c-5d85-4635-b3bb-fc06f292c59e@I-love.SAKURA.ne.jp
Signed-off-by: Petr Mladek <pmladek@suse.com>

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Tetsuo Handa 2026-08-04 22:52:19 +09:00 • committed by Petr Mladek

parent 77ae27fd98

commit 72dd0ec09e

2 changed files with 2 additions and 2 deletions

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2

kernel/printk/nbcon.c

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2

kernel/printk/printk.c

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