From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail78-36.sinamail.sina.com.cn (mail78-36.sinamail.sina.com.cn [219.142.78.36]) (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 B43D31F8F19 for ; Wed, 22 Jan 2025 10:36:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=219.142.78.36 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737542207; cv=none; b=H0DIG9Ig1AEiJkrjeY6fGO0fdgHWZuz/tl9mMvTLju51RHJsPaZDYpOzdAwkF7o/9cfkuMwSMVDJStP3iKjftmoFnbR8JuUCE1erhBrTfSyhN+ZFTysyeL64nXAyTySzIt4YRKBq403FRsm3+Nfup9TEYdKFfzebuqrs5DbRo+8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737542207; c=relaxed/simple; bh=aFOZ2SHafY9/cl1HcAlmorEKvH5hvG0Y8200l2J89bE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i2ziVttEGNmGu7OW4tZ/q9mUlCjmonNJKdxroqezgb+MxI32pEh1UwMhYFemtZEx33ht18lNJViLdkNnRRRAWTXYKNXVNV2d2OaEbtiU4Em+SAxWqHmiLPuv3wkow5VozQZ9YbZj+35o4q+LMCGDs6TPXTiHkmuY57UsrfwKWew= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; arc=none smtp.client-ip=219.142.78.36 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([113.88.49.211]) by sina.com (10.185.250.24) with ESMTP id 6790CA040000722A; Wed, 22 Jan 2025 18:35:51 +0800 (CST) X-Sender: hdanton@sina.com X-Auth-ID: hdanton@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=hdanton@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=hdanton@sina.com X-SMAIL-MID: 87873110748361 X-SMAIL-UIID: 067B3086973148C3BDD8E75A985F8199-20250122-183551-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [cgroups?] possible deadlock in console_lock_spinning_enable (5) Date: Wed, 22 Jan 2025 18:35:40 +0800 Message-ID: <20250122103542.1719-1-hdanton@sina.com> In-Reply-To: <66ff0083.050a0220.49194.03bb.GAE@google.com> References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Thu, 03 Oct 2024 13:37:23 -0700 > syzbot has found a reproducer for the following issue on: > > HEAD commit: 5f5673607153 Merge branch 'for-next/core' into for-kernelci > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17f0f580580000 #syz test upstream master --- x/kernel/workqueue.c +++ y/kernel/workqueue.c @@ -7815,7 +7815,7 @@ void __init workqueue_init_early(void) system_wq = alloc_workqueue("events", 0, 0); system_highpri_wq = alloc_workqueue("events_highpri", WQ_HIGHPRI, 0); - system_long_wq = alloc_workqueue("events_long", 0, 0); + system_long_wq = alloc_workqueue("events_long", WQ_MEM_RECLAIM, 0); system_unbound_wq = alloc_workqueue("events_unbound", WQ_UNBOUND, WQ_MAX_ACTIVE); system_freezable_wq = alloc_workqueue("events_freezable", --