From patchwork Mon Apr 1 20:59:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Roth X-Patchwork-Id: 10880649 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 102B8922 for ; Mon, 1 Apr 2019 21:30:34 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EA45A284C9 for ; Mon, 1 Apr 2019 21:30:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DE6A92887A; Mon, 1 Apr 2019 21:30:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 75670284C9 for ; Mon, 1 Apr 2019 21:30:33 +0000 (UTC) Received: from localhost ([127.0.0.1]:45157 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hB4Vk-0003mw-LK for patchwork-qemu-devel@patchwork.kernel.org; Mon, 01 Apr 2019 17:30:32 -0400 Received: from eggs.gnu.org ([209.51.188.92]:41065) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hB44k-0001XY-Vi for qemu-devel@nongnu.org; Mon, 01 Apr 2019 17:02:39 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hB44k-0003Yr-15 for qemu-devel@nongnu.org; Mon, 01 Apr 2019 17:02:38 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:55616 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hB44j-0003SD-SY for qemu-devel@nongnu.org; Mon, 01 Apr 2019 17:02:37 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x31L1pO9095664 for ; Mon, 1 Apr 2019 17:02:27 -0400 Received: from e36.co.us.ibm.com (e36.co.us.ibm.com [32.97.110.154]) by mx0a-001b2d01.pphosted.com with ESMTP id 2rkswegx6f-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 01 Apr 2019 17:02:26 -0400 Received: from localhost by e36.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 1 Apr 2019 22:02:21 +0100 Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x31L2KDs49086598 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 1 Apr 2019 21:02:20 GMT Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 601DF6A04D; Mon, 1 Apr 2019 21:02:20 +0000 (GMT) Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 13BDE6A051; Mon, 1 Apr 2019 21:02:20 +0000 (GMT) Received: from localhost (unknown [9.80.94.43]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP; Mon, 1 Apr 2019 21:02:19 +0000 (GMT) From: Michael Roth To: qemu-devel@nongnu.org Date: Mon, 1 Apr 2019 15:59:19 -0500 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190401210011.16009-1-mdroth@linux.vnet.ibm.com> References: <20190401210011.16009-1-mdroth@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19040121-0020-0000-0000-00000ED21F20 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00010857; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000283; SDB=6.01182941; UDB=6.00619269; IPR=6.00963684; MB=3.00026249; MTD=3.00000008; XFM=3.00000015; UTC=2019-04-01 21:02:22 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19040121-0021-0000-0000-00006548BF79 Message-Id: <20190401210011.16009-46-mdroth@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-04-01_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904010136 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH 45/97] ne2000: fix possible out of bound access in ne2000_receive 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: Jason Wang , qemu-stable@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Jason Wang In ne2000_receive(), we try to assign size_ to size which converts from size_t to integer. This will cause troubles when size_ is greater INT_MAX, this will lead a negative value in size and it can then pass the check of size < MIN_BUF_SIZE which may lead out of bound access of for both buf and buf1. Fixing by converting the type of size to size_t. CC: qemu-stable@nongnu.org Reported-by: Daniel Shapira Reviewed-by: Michael S. Tsirkin Signed-off-by: Jason Wang (cherry picked from commit fdc89e90fac40c5ca2686733df17b6423fb8d8fb) Signed-off-by: Michael Roth --- hw/net/ne2000.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/net/ne2000.c b/hw/net/ne2000.c index 07d79e317f..869518ee06 100644 --- a/hw/net/ne2000.c +++ b/hw/net/ne2000.c @@ -174,7 +174,7 @@ static int ne2000_buffer_full(NE2000State *s) ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_) { NE2000State *s = qemu_get_nic_opaque(nc); - int size = size_; + size_t size = size_; uint8_t *p; unsigned int total_len, next, avail, len, index, mcast_idx; uint8_t buf1[60]; @@ -182,7 +182,7 @@ ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_) { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; #if defined(DEBUG_NE2000) - printf("NE2000: received len=%d\n", size); + printf("NE2000: received len=%zu\n", size); #endif if (s->cmd & E8390_STOP || ne2000_buffer_full(s))