From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail115-100.sinamail.sina.com.cn (mail115-100.sinamail.sina.com.cn [218.30.115.100]) (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 496641F9ABC for ; Fri, 3 Jan 2025 10:43:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=218.30.115.100 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735901010; cv=none; b=HC2ab8y8FL8DfGChrlqFFWrdlp6w6yU24InBlB7K5WfFDkCjlSV6VS+M0vRW9WX53PTElPD58iSKOG5XODA+/2c8H+TRhmGRvlFzAr7F3TGB3g6GEhxuIdUZ5rrX3u+CWX+DknoRNS1/sWyeJFUEtfD1Zvt4hgFn7OYIIecFHtU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735901010; c=relaxed/simple; bh=J3oY9ZTM3gF4Lr49LKwL2owMWztGpJ+PZ8C6uul8KX8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cjW7fAeSbYkUO47h5rRgBqjVAI65zcGDp4AEh/BDGmv/WzxOL0+PwniVrq4/RLMULofrphpNJWMv5oCq5xxsEjpTeX6Zn8n1nraCs/caM9vJAjYQ8q8X9J2/eIGdIqIakpHGNTrrBJo1TCuCDgHCY2LxIt4h/ciXBaUkUkeISu8= 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=218.30.115.100 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)([113.118.68.213]) by sina.com (10.185.250.23) with ESMTP id 6777BF420000051D; Fri, 3 Jan 2025 18:43:16 +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: 8458298913297 X-SMAIL-UIID: E153A17E31B140D384CA5B71EDC0BF7D-20250103-184316-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [pm?] possible deadlock in rpm_suspend Date: Fri, 3 Jan 2025 18:43:04 +0800 Message-ID: <20250103104306.1331-1-hdanton@sina.com> In-Reply-To: <67736a76.050a0220.2f3838.04d6.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 Mon, 30 Dec 2024 19:52:22 -0800 > syzbot has found a reproducer for the following issue on: > > HEAD commit: 8155b4ef3466 Add linux-next specific files for 20241220 > git tree: linux-next > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16491818580000 #syz test --- x/kernel/workqueue.c +++ y/kernel/workqueue.c @@ -7807,7 +7807,7 @@ 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", --