From nobody Tue Nov 4 15:40:41 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1503967128456107.84642390015858; Mon, 28 Aug 2017 17:38:48 -0700 (PDT) Received: from localhost ([::1]:42008 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dmUYI-0004dM-7h for importer@patchew.org; Mon, 28 Aug 2017 20:38:46 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48266) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dmUCa-0001Qm-7a for qemu-devel@nongnu.org; Mon, 28 Aug 2017 20:16:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dmUCW-0005dq-LA for qemu-devel@nongnu.org; Mon, 28 Aug 2017 20:16:20 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:49611) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dmUCW-0005bN-9Z for qemu-devel@nongnu.org; Mon, 28 Aug 2017 20:16:16 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v7T0E8hL005492 for ; Mon, 28 Aug 2017 20:16:15 -0400 Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) by mx0a-001b2d01.pphosted.com with ESMTP id 2cmvjejkm8-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 28 Aug 2017 20:16:15 -0400 Received: from localhost by e35.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 28 Aug 2017 18:16:12 -0600 Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v7T0GCKA32112770; Mon, 28 Aug 2017 17:16:12 -0700 Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4CAC46A042; Mon, 28 Aug 2017 18:16:12 -0600 (MDT) Received: from localhost (unknown [9.80.85.217]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP id 1A6B76A03D; Mon, 28 Aug 2017 18:16:12 -0600 (MDT) From: Michael Roth To: qemu-devel@nongnu.org Date: Mon, 28 Aug 2017 19:14:22 -0500 X-Mailer: git-send-email 2.7.4 In-Reply-To: <1503965694-10794-1-git-send-email-mdroth@linux.vnet.ibm.com> References: <1503965694-10794-1-git-send-email-mdroth@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 17082900-0012-0000-0000-000014ECDC48 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007630; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000226; SDB=6.00909027; UDB=6.00455849; IPR=6.00689279; BA=6.00005557; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00016909; XFM=3.00000015; UTC=2017-08-29 00:16:14 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17082900-0013-0000-0000-00004F43FB3A Message-Id: <1503965694-10794-48-git-send-email-mdroth@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-08-28_13:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1708290001 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 Subject: [Qemu-devel] [PATCH 47/79] virtio-serial-bus: Unset hotplug handler when unrealize X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ladi Prosek , qemu-stable@nongnu.org, "Michael S . Tsirkin" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Ladi Prosek Virtio serial device controls the lifetime of virtio-serial-bus and virtio-serial-bus links back to the device via its hotplug-handler property. This extra ref-count prevents the device from getting finalized, leaving the VirtIODevice memory listener registered and leading to use-after-free later on. This patch addresses the same issue as Fam Zheng's "virtio-scsi: Unset hotplug handler when unrealize" only for a different virtio device. Cc: qemu-stable@nongnu.org Signed-off-by: Ladi Prosek Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin Reviewed-by: Paolo Bonzini Reviewed-by: Fam Zheng (cherry picked from commit f811f97040a48358b456b46ecbc9167f0131034f) Signed-off-by: Michael Roth --- hw/char/virtio-serial-bus.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c index d797a67..aa9c11a 100644 --- a/hw/char/virtio-serial-bus.c +++ b/hw/char/virtio-serial-bus.c @@ -1121,6 +1121,9 @@ static void virtio_serial_device_unrealize(DeviceStat= e *dev, Error **errp) timer_free(vser->post_load->timer); g_free(vser->post_load); } + + qbus_set_hotplug_handler(BUS(&vser->bus), NULL, errp); + virtio_cleanup(vdev); } =20 --=20 2.7.4