From nobody Thu Nov 6 03:17:18 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.zoho.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 1493980077953311.7580844618677; Fri, 5 May 2017 03:27:57 -0700 (PDT) Received: from localhost ([::1]:46109 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d6aSq-00065R-Em for importer@patchew.org; Fri, 05 May 2017 06:27:56 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47092) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d6aFG-0002KZ-Kx for qemu-devel@nongnu.org; Fri, 05 May 2017 06:13:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d6aFD-0006df-NN for qemu-devel@nongnu.org; Fri, 05 May 2017 06:13:54 -0400 Received: from mx1.redhat.com ([209.132.183.28]:32822) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d6aFD-0006dS-Gk for qemu-devel@nongnu.org; Fri, 05 May 2017 06:13:51 -0400 Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 8EBA7C056790 for ; Fri, 5 May 2017 10:13:50 +0000 (UTC) Received: from donizetti.redhat.com (ovpn-116-145.ams2.redhat.com [10.36.116.145]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v45ADbkQ026855; Fri, 5 May 2017 06:13:49 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 8EBA7C056790 Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=pbonzini@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 8EBA7C056790 From: Paolo Bonzini To: qemu-devel@nongnu.org Date: Fri, 5 May 2017 12:13:25 +0200 Message-Id: <20170505101337.4650-10-pbonzini@redhat.com> In-Reply-To: <20170505101337.4650-1-pbonzini@redhat.com> References: <20170505101337.4650-1-pbonzini@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Fri, 05 May 2017 10:13:50 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 09/21] vmw_pvscsi: check message ring page count at initialisation 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: P J P 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: P J P A guest could set the message ring page count to zero, resulting in infinite loop. Add check to avoid it. Reported-by: YY Z Signed-off-by: P J P Message-Id: <20170425130623.3649-1-ppandit@redhat.com> Reviewed-by: Dmitry Fleytman Signed-off-by: Paolo Bonzini --- hw/scsi/vmw_pvscsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/scsi/vmw_pvscsi.c b/hw/scsi/vmw_pvscsi.c index 75575461e2..4a106da856 100644 --- a/hw/scsi/vmw_pvscsi.c +++ b/hw/scsi/vmw_pvscsi.c @@ -202,7 +202,7 @@ pvscsi_ring_init_msg(PVSCSIRingInfo *m, PVSCSICmdDescSe= tupMsgRing *ri) uint32_t len_log2; uint32_t ring_size; =20 - if (ri->numPages > PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGES) { + if (!ri->numPages || ri->numPages > PVSCSI_SETUP_MSG_RING_MAX_NUM_PAGE= S) { return -1; } ring_size =3D ri->numPages * PVSCSI_MAX_NUM_MSG_ENTRIES_PER_PAGE; --=20 2.12.2