From patchwork Mon Sep 26 08:34:40 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kurz X-Patchwork-Id: 675014 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3sjHZb3WBdz9rxw for ; Mon, 26 Sep 2016 18:44:23 +1000 (AEST) Received: from localhost ([::1]:42404 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boRWP-0002sN-2G for incoming@patchwork.ozlabs.org; Mon, 26 Sep 2016 04:44:21 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47725) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boRNF-00020w-78 for qemu-devel@nongnu.org; Mon, 26 Sep 2016 04:34:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1boRNB-0006B3-6I for qemu-devel@nongnu.org; Mon, 26 Sep 2016 04:34:53 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:55116 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boRNB-0006Ax-0a for qemu-devel@nongnu.org; Mon, 26 Sep 2016 04:34:49 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u8Q8XS0N081142 for ; Mon, 26 Sep 2016 04:34:48 -0400 Received: from e32.co.us.ibm.com (e32.co.us.ibm.com [32.97.110.150]) by mx0b-001b2d01.pphosted.com with ESMTP id 25p6ak19us-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 26 Sep 2016 04:34:48 -0400 Received: from localhost by e32.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Mon, 26 Sep 2016 02:34:44 -0600 Received: from b01cxnp23032.gho.pok.ibm.com (b01cxnp23032.gho.pok.ibm.com [9.57.198.27]) by d03dlp02.boulder.ibm.com (Postfix) with ESMTP id CFBC53E40041; Mon, 26 Sep 2016 02:34:43 -0600 (MDT) Received: from b01ledav03.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp23032.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u8Q8Ym2S15073786; Mon, 26 Sep 2016 08:34:48 GMT Received: from b01ledav03.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 511BBB204D; Mon, 26 Sep 2016 04:34:43 -0400 (EDT) Received: from [192.168.66.108] (unknown [9.84.96.44]) by b01ledav03.gho.pok.ibm.com (Postfix) with ESMTP id 862A2B204E; Mon, 26 Sep 2016 04:34:41 -0400 (EDT) From: Greg Kurz To: qemu-devel@nongnu.org Date: Mon, 26 Sep 2016 10:34:40 +0200 In-Reply-To: <147487882735.6679.8076815106195077844.stgit@bahia> References: <147487882735.6679.8076815106195077844.stgit@bahia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16092608-0004-0000-0000-00001077375C X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00005813; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000185; SDB=6.00761409; UDB=6.00362633; IPR=6.00536326; BA=6.00004756; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00012783; XFM=3.00000011; UTC=2016-09-26 08:34:46 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16092608-0005-0000-0000-00007935E29C Message-Id: <147487888056.6679.17541794925955609666.stgit@bahia> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-09-26_05:, , 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=8.0.1-1609020000 definitions=main-1609260162 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v3 6/9] virtio-net: handle virtio_net_receive() errors 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: Kevin Wolf , "Michael S. Tsirkin" , Jason Wang , Greg Kurz , Max Reitz , "Aneesh Kumar K.V" , Stefan Hajnoczi , Cornelia Huck , Paolo Bonzini Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" All these errors are caused by a buggy guest: let's switch the device to the broken state instead of terminating QEMU. Also we detach the element from the virtqueue and free it. Signed-off-by: Greg Kurz Reviewed-by: Cornelia Huck Reviewed-by: Stefan Hajnoczi --- v3: - detach and free element - updated changelog --- hw/net/virtio-net.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c index 2c02ba8a70a4..10a4c745f0bd 100644 --- a/hw/net/virtio-net.c +++ b/hw/net/virtio-net.c @@ -1125,21 +1125,24 @@ static ssize_t virtio_net_receive(NetClientState *nc, const uint8_t *buf, size_t elem = virtqueue_pop(q->rx_vq, sizeof(VirtQueueElement)); if (!elem) { - if (i == 0) - return -1; - error_report("virtio-net unexpected empty queue: " - "i %zd mergeable %d offset %zd, size %zd, " - "guest hdr len %zd, host hdr len %zd " - "guest features 0x%" PRIx64, - i, n->mergeable_rx_bufs, offset, size, - n->guest_hdr_len, n->host_hdr_len, - vdev->guest_features); - exit(1); + if (i) { + virtio_error(vdev, "virtio-net unexpected empty queue: " + "i %zd mergeable %d offset %zd, size %zd, " + "guest hdr len %zd, host hdr len %zd " + "guest features 0x%" PRIx64, + i, n->mergeable_rx_bufs, offset, size, + n->guest_hdr_len, n->host_hdr_len, + vdev->guest_features); + } + return -1; } if (elem->in_num < 1) { - error_report("virtio-net receive queue contains no in buffers"); - exit(1); + virtio_error(vdev, + "virtio-net receive queue contains no in buffers"); + virtqueue_detach_element(q->rx_vq, elem, 0); + g_free(elem); + return -1; } sg = elem->in_sg;