From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from list by lists.gnu.org with archive (Exim 4.71) id 1bX1RU-0004lU-HA for mharc-qemu-trivial@gnu.org; Tue, 09 Aug 2016 03:27:16 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47061) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bX1RP-0004gl-EK for qemu-trivial@nongnu.org; Tue, 09 Aug 2016 03:27:15 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bX1RJ-0002Jb-PC for qemu-trivial@nongnu.org; Tue, 09 Aug 2016 03:27:10 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43982) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bX1RC-0002D6-Jw; Tue, 09 Aug 2016 03:26:58 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (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 0530C811A2; Tue, 9 Aug 2016 07:26:57 +0000 (UTC) Received: from [10.72.4.112] (vpn1-4-112.pek2.redhat.com [10.72.4.112]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u797Qq7I011816 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 9 Aug 2016 03:26:54 -0400 To: chaojianhu , qemu-devel@nongnu.org References: Cc: qemu-trivial@nongnu.org, edgar.iglesias@gmail.com, alistair.francis@xilinx.com, qemu-arm@nongnu.org From: Jason Wang Message-ID: Date: Tue, 9 Aug 2016 15:26:52 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Tue, 09 Aug 2016 07:26:57 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: Re: [Qemu-trivial] [PATCH] hw/net: Fix a heap overflow in xlnx.xps-ethernetlite X-BeenThere: qemu-trivial@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Aug 2016 07:27:15 -0000 On 2016=E5=B9=B408=E6=9C=8809=E6=97=A5 11:52, chaojianhu wrote: > The .receive callback of xlnx.xps-ethernetlite doesn't check the length > of data before calling memcpy. As a result, the NetClientState object i= n > heap will be overflowed. All versions of qemu with xlnx.xps-ethernetlit= e > will be affected. > > Reported-by: chaojianhu > Signed-off-by: chaojianhu > > --- > hw/net/xilinx_ethlite.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/hw/net/xilinx_ethlite.c b/hw/net/xilinx_ethlite.c > index 54db2b8..35de353 100644 > --- a/hw/net/xilinx_ethlite.c > +++ b/hw/net/xilinx_ethlite.c > @@ -197,6 +197,10 @@ static ssize_t eth_rx(NetClientState *nc, const ui= nt8_t *buf, size_t size) > } > =20 > D(qemu_log("%s %zd rxbase=3D%x\n", __func__, size, rxbase)); > + if (size > (R_MAX - R_RX_BUF0 - rxbase) * 4) { > + D(qemu_log("ethlite packet is too big, size=3D%x\n", size)); > + return -1; > + } > memcpy(&s->regs[rxbase + R_RX_BUF0], buf, size); > =20 > s->regs[rxbase + R_RX_CTRL0] |=3D CTRL_S; Applied, thanks.