From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 93C7722156C for ; Wed, 6 Aug 2025 08:19:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754468380; cv=none; b=Rdbdg/0YFwlwvvubq4224/HuOZTva/YD6/qE38RBz13WjR3iiHNFcYSlPFbqhv+zj7UIRL7QxsCuRXuzr0iZchUCoYgXC46Jtr+EuhdGGEuSh3nKOf0AcBHfNTBvGATxnokU6KQXY9Yw3U2sro5xqGh9Vl7h4OPHOuXz44cT1g0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754468380; c=relaxed/simple; bh=IVjr//uof7qqewl634ccGIDdOxr2Aqk5JWUUy1OOZzk=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=EqYPfQAHcFKjM79cBG8HpFRHmZ4O7kQ2p5hsmqOidSNYABeQTrvWyo1S7Kqcwzc3GAQxJN/qiIXfe489CzKn4pu2TurI0YJIOh+HRbg+tcxAd5Qhb5DmyJRs3Kjipxp+LTr55rDJrSjmU413xh1/k7c6VwWEexGamJremo5Rjw4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=QWJHUWIg; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=pgHLrFBr; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="QWJHUWIg"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="pgHLrFBr" From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1754468376; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=oVdy8Z7vxFzMcZIpJyuv2XRd6gG/b+uZsIufJIRyPeI=; b=QWJHUWIgKOkWwT5562fAfhJ9uJLrMtrpaQzMifCtJqLDgfMH1u0XdXvTrh/CIOCabQaqBQ cgVIVQfi+KbJuFCT91ih48QWuiIbiuqxQQmVYbL3MRkooSCRWlld82qxYukk0KBouUC5+s sPwO3i1DSbY3/HMlf8cjedZHjTcl/yRhtB5QQuBMhj230CXdpEdwdGa8YSrmsyzG/UgyQA 1demA3314+qD7tnrtLuzDi6J/CxsthtD+prE43pUGT3U9AhOUyD3mk5ufQ0H9YTqW4LlPs mdwNnmjuYXMtUK623HiF/mOvnsFKhx2u2NXrL3mRP/ARU+mAj9214FAQMtPV0g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1754468376; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=oVdy8Z7vxFzMcZIpJyuv2XRd6gG/b+uZsIufJIRyPeI=; b=pgHLrFBriDWLVZhnxPV/QBPg3icmRlb1PYdcBqzrGiZnZXZRxauEBmaFZGqJidZmTuwGyC YjtRtX5quqfdPWBA== To: Oliver Sang Cc: Peter Zijlstra , oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, x86@kernel.org, Sebastian Andrzej Siewior , linux-mm@kvack.org, ltp@lists.linux.it, oliver.sang@intel.com Subject: Re: [tip:locking/futex] [futex] 56180dd20c: BUG:sleeping_function_called_from_invalid_context_at_kernel/nsproxy.c In-Reply-To: References: <202507231021.dcf24373-lkp@intel.com> <87a54usty4.ffs@tglx> <87seikp94v.ffs@tglx> <87wm7ro3r7.ffs@tglx> <87cy9gilo8.ffs@tglx> <874iusihka.ffs@tglx> Date: Wed, 06 Aug 2025 10:19:36 +0200 Message-ID: <87qzxoeuav.ffs@tglx> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Oliver! On Wed, Aug 06 2025 at 16:01, Oliver Sang wrote: > On Thu, Jul 31, 2025 at 04:03:01PM +0200, Thomas Gleixner wrote: >> On Thu, Jul 31 2025 at 14:34, Thomas Gleixner wrote: >> > Either you make the timeout longer or try the following on the kernel >> > command line instead of 'ftrace_dump_on_cpu': >> >> instead of 'ftrace_dump_ooops' > > sorry for late, I just took several-day off. I hope you had a good time! > attached dmesg FYI. Thanks for doing this. Now the buffer is too short and as nothing stops the tracer the interesting stuff goes out of sight. Can you please apply the patch below and try again? Thanks, tglx --- --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5850,6 +5850,8 @@ void preempt_count_sub(int val) /* * Underflow? */ + if (val > preempt_count()) + tracing_off(); if (DEBUG_LOCKS_WARN_ON(val > preempt_count())) return; /*