From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail115-69.sinamail.sina.com.cn (mail115-69.sinamail.sina.com.cn [218.30.115.69]) (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 8391C1CAA5 for ; Sat, 11 May 2024 23:34:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=218.30.115.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715470471; cv=none; b=U54YMXxymIzh4RhNbENUspLGHWT2iQmAZsCYPWQQLrXBXhG0qaPJyg5pMf/t8x3O7QxEA+7iMYtEQILfsNAWkW6VujD2uC8QRSEGEBYWQIQcyv7KYbBOTij/HPQsIoweKNrlWNHRR82lNsF3WIBvbe5eafJq1p+LMPBIKQ5B6L0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715470471; c=relaxed/simple; bh=yG3QvXIBxLaiZvKf2nykW9fnavoQe0jaouFl5e8ukZg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=PPX3N5k/6k5ZECVnOx3j4OsS/K8c5nSgWMCh0LlpFWy46Fo6VypP52TW0colcXAYen6pg8D5RstVckfm62G//5Hy5oFj5fLkdF9gsnpxUHfJsheEo1Bk87AQF3phw7mnTM9B8CR95ujD+IUUOEStLEFtRggMdw8ez8kFLgdwyK8= 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=218.30.115.69 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)([113.88.49.25]) by sina.com (10.75.12.45) with ESMTP id 6640007500001EDC; Sat, 12 May 2024 07:34:16 +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: 22319631457846 X-SMAIL-UIID: CCAE3AD48149438794BBB3613593D6F3-20240512-073416-1 From: Hillf Danton To: lee bruce Cc: syzbot+68619f9e9e69accd8e0a@syzkaller.appspotmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, Edward Adam Davis , clf700383@gmail.com, michael.christie@oracle.com, mst@redhat.com Subject: Re: [syzbot] [kernel?] KASAN: slab-use-after-free Read in kill_orphaned_pgrp (2) Date: Sun, 12 May 2024 07:34:04 +0800 Message-Id: <20240511233404.2764-1-hdanton@sina.com> In-Reply-To: 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 Sat, 11 May 2024 22:45:06 +0800 lee bruce > Hello, I found a reproducer for this bug. > Thanks for your report. > If you fix this issue, please add the following tag to the commit: > Reported-by: xingwei lee > Reported-by: lingfei cheng > > I use the same kernel as syzbot instance > Kernel Commit: upstream dccb07f2914cdab2ac3a5b6c98406f765acab803 > Kernel Config: https://syzkaller.appspot.com/text?tag=3DKernelConfig&x=3D6d14c12b661fb43 > with KASAN enabled > > Since the same title bug is triggered in > https://syzkaller.appspot.com/bug?id=3D70492b96ff47ff70cfc433be100586119310670b. > I make a simple RCA. > In the old-syzbot instance the bug still trigger the title "KASAN: > slab-use-after-free Read in kill_orphaned_pgrp=E2=80=9D and in the lastest > syzbot the bug report as > > TITLE: WARNING in signal_wake_up_state > ------------[ cut here ]------------ > WARNING: CPU: 3 PID: 8591 at kernel/signal.c:762 > signal_wake_up_state+0xf8/0x130 kernel/signal.c:762 > Modules linked in: > CPU: 3 PID: 8591 Comm: file0 Not tainted 6.9.0-rc7-00012-gdccb07f2914c #6 Could you reproduce it in the next tree, because of d558664602d3 ("vhost_task: Handle SIGKILL by flushing work and exiting") adding reaction to signal?