From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f41.google.com (mail-wr1-f41.google.com [209.85.221.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2F01B443E32 for ; Thu, 20 Aug 2026 13:17:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.41 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787231832; cv=none; b=HyZI0oAPcTtVAHxOMN70box6h3gFZG5XRraed8AiBkXryELXknyl+qWRghg5EowyFUeVjeKPGa7AF1d+EbHgMyLHmrD0mJV/lragB0+EWt1CA2jKsjTDy0JXhBnmBxqYDNTTvrAN1VjFm34pk5N4nFw5uDfXm62Y1d7gAxL7rus= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787231832; c=relaxed/simple; bh=msYFLui1XnB+PJnr3OBICShkV59ypgJH/2mecpAOFmY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WvtVDzzl4fh9dSnae7pi8dlGjZ08FjDjKvt9dX24WVSZA7mXP/LYjpKUBv7I245awqlFS3fLnZDLadFvWGtUvuHRFatMcSpe//iRbkTrrnTGdKHSOkpC091jwt/roW0bzFYfFH6NYQRoTUKFBnlid+5nNn7k8DieOz6XaG+7xZk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com; spf=pass smtp.mailfrom=suse.com; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b=SgREtH/4; arc=none smtp.client-ip=209.85.221.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=suse.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=suse.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=suse.com header.i=@suse.com header.b="SgREtH/4" Received: by mail-wr1-f41.google.com with SMTP id ffacd0b85a97d-47de0093c42so2164565f8f.3 for ; Thu, 20 Aug 2026 06:17:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1787231829; x=1787836629; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=Jrk+IsSqdyRM5QjNmRdup/1h6RCSzP6fZVOa9I71+ys=; b=SgREtH/43QBOpa8qCiIypIlNTkNQW/6sZ1JGRvrUhEWx/4HZIt4MPLT3nEqDhce4/x dqRvcYNE6aWwZS4z/vkpIKlUwUlMrOzj+C9tiIwmaMJKMwp9P4k92C3H0pa9lPN5mgLt qtSOPe3fZ5HQwDnkfewEnp3wrtWT1hLWUMjiemIE2MRb1fxWJa1HDasNfUdsEWEF3dBQ 0q8zo3v0d/0xO0HNvdlsNMi35+BXyQIFDikxr7LHHj/A11yzTMa0jOeE9LU9Ph+ooRFJ wgAM51nOP+lt7q8xTHV5L9L+810iNmjm0z4o3iPAbBCNaRpbcMkFkZopzSPBIiGjlq+K /Pxw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787231829; x=1787836629; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=Jrk+IsSqdyRM5QjNmRdup/1h6RCSzP6fZVOa9I71+ys=; b=LpiVF3d6QshzBSfLa+YEUUb4xGUxPPCavcpXVOHrdt5gRZsWcz6uGS1JmEBO0HFFMD WP659biLcp8uy+dd4Po/L+QuCiB4DSr8HR7spbjUUlKzDMjutyrxeKqYs19UmULpE8oj QkS3L0dTAS5xS15qRAegL3P+MfwOb7LOcsOE5G4yyJjwSexxWVP7FMXuP01ujjNAKT+t hq7zBHAokWktAXGEGppDkWDmBklRr4FUXJFot4IGdMDeTihDGzhFWSbRXqkxh3bhPI23 lK6LEhaSFk+Q6tfEdSY7flLZO/sdxx3Y4WJm+xonkID95S6mAnAhuE6jqgb4UXtN/ZO+ NkHw== X-Forwarded-Encrypted: i=1; AHgh+RoTkSPfnZb+dtAfeSt4AULexDr2ISp2ITjKzxgIqkmxGaqhR2UHgYJmrX0Yw0fTPLxUd0nAmY5ydwrY600=@vger.kernel.org X-Gm-Message-State: AFuF++nLEVegdtJV39MqTsvy7YM+ehbQ5IX/CDahBiqEwhQnl+lcoh5c XettWpzsn17jBc+lezGL5jt0Yqz0V8Zo9SARonwENCgpEvO+eHJNI83fxAfaZOgI0xk= X-Gm-Gg: AR+sD120y5TS4NOPPirvef8bQOXB8y1mHYb/dL0sV23bX98tp6Rp+ulLELvvE+3moIA 44+FsREI82gDEEF13XM9bYsU2ki0uObSmLZF4jWlClau4dPtv9vHZB3mnCU1hxXQfVEFjBQl/zE mCRFgHxAglHCYS8qne6t5Eeo5CLF5vGdt9/0JkJ3JqWpgxPNOsjrgsK6KdZgHtBXMhBhhPeyIPi 8NkK8NOXaT8cfGJ+Pz2fslFe+B0wJoAeUx2ygBOkFpJGSTntUHP/0b/oNhcEt7DC1ex5upke+IT 7h8aOFCqqWzKWFe3s9gAVNZDzaJ7ZPFRtP4mAhe9hDmECL4ykP66Ko6uILqE4sqWzxwNzRENyil bS/NdmvofVYuuc39PBq4dWFohKPfoCS535+mM8A8pY2FdKAM2yoa4OJgEKHpjrozjdPqdtuBgRZ 6YqmgK7IvIAOSep2/njzDqWNswMINkLqqs7EfmlHUCovGo9nEg5Owx6oSBkwtp6DcRiXHELNROT g== X-Received: by 2002:a5d:59a7:0:b0:481:511c:8d45 with SMTP id ffacd0b85a97d-482b1ff5789mr24499924f8f.20.1787231829171; Thu, 20 Aug 2026 06:17:09 -0700 (PDT) Received: from pathway.suse.cz ([176.114.240.130]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-482b14b8050sm13598366f8f.19.2026.08.20.06.17.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Aug 2026 06:17:08 -0700 (PDT) Date: Thu, 20 Aug 2026 15:17:06 +0200 From: Petr Mladek To: Tetsuo Handa Cc: Steven Rostedt , John Ogness , Sergey Senozhatsky , Thomas Gleixner , LKML Subject: Re: [PATCH] printk: Don't WARN on kthread_run failure. Message-ID: References: <76bb4c1c-5d85-4635-b3bb-fc06f292c59e@I-love.SAKURA.ne.jp> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <76bb4c1c-5d85-4635-b3bb-fc06f292c59e@I-love.SAKURA.ne.jp> On Tue 2026-08-04 22:52:19, Tetsuo Handa wrote: > 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: 5f53ca3ff83b ("printk: Implement legacy printer kthread for PREEMPT_RT") > Fixes: 76f258bf3f2a ("printk: nbcon: Introduce printer kthreads") > Signed-off-by: Tetsuo Handa Makes sense. Reviewed-by: Petr Mladek Best Regards, Petr PS: We are in the middle of the merge window. I am going to push this into printk tree on top of the pending merge request once it gets accepted.