From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from r3-17.sinamail.sina.com.cn (r3-17.sinamail.sina.com.cn [202.108.3.17]) (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 2E2351E9B3F for ; Mon, 1 Sep 2025 06:57:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.108.3.17 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756709863; cv=none; b=naG+IglBe3LsPj3vZEuWTPljupJgxD3MDfgPtIKv+YbR8U0BRJ/7VW+xH72MS7IL0MKGNehq226cvVU36CnunB9nofnb0g5dGdRJelwIj6ng8y1Wk31WhUFUPEwA//PwYOSwx0bFfpBGHiH5NQ07D+03c3PjE8pN+MELnsTrZbU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756709863; c=relaxed/simple; bh=Fub1UP+n8NmRNScoI5qW04yCBWTUD5j5Dg7nDWvwPd0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=utp+DpdJdX32xegpWNOkJOLlDDsiGnWabkVU6d9whC+fD94G7NOUr8SYHuRBACTd2IWQ9leOOYPPLosF4toilmBQKV7MCFlRqKy64sw/E9Cr2T67iH3G5guE1X4f/ZE5W32ZKz06/9t0cbxHN7Itozd/ds6rGW3oZHJMMZth+bM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b=KovP2iGq; arc=none smtp.client-ip=202.108.3.17 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=sina.com header.i=@sina.com header.b="KovP2iGq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1756709858; bh=k1SQLLjHxbi67NqmhR5akSxouIODcWy1++inNt4SAlY=; h=From:Subject:Date:Message-ID; b=KovP2iGqTTQ3QkdYGMir4tKNyRRwIp7hzS0iSOqrF7KpC8LEa73aeOuZPoRqhrcxX gC79knk1HCYN1lr1imIYfPm1rWdOdqs6ZLcy8JUde8WOM6GdPcTdaoIQC9uXK/0e7p Jzsfb44ARniTcfkI93X6m8E3vf4lg/mQM49IAXKc= X-SMAIL-HELO: localhost.localdomain Received: from unknown (HELO localhost.localdomain)([114.249.58.236]) by sina.com (10.54.253.34) with ESMTP id 68B543DD00006983; Mon, 1 Sep 2025 14:57:35 +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: 3181326291978 X-SMAIL-UIID: BB4FEAE35CDF403283C31FC5FC93B100-20250901-145735-1 From: Hillf Danton To: syzbot Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [net] [virt] INFO: task hung in __vhost_worker_flush Date: Mon, 1 Sep 2025 14:57:20 +0800 Message-ID: <20250901065724.6315-1-hdanton@sina.com> In-Reply-To: <68b3b1ac.a70a0220.1c57d1.028b.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 > Date: Sat, 30 Aug 2025 19:21:32 -0700 [thread overview] > syzbot has found a reproducer for the following issue on: > > HEAD commit: 11e7861d680c Merge tag 'for-linus' of git://git.kernel.org.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17c5c242580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=d4703ac89d9e185a > dashboard link: https://syzkaller.appspot.com/bug?extid=7f3bbe59e8dd2328a990 > compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1671ba62580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1685aa62580000 #syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3652117f8548