From patchwork Tue Jun 26 08:31:19 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 934725 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 41FK5s1JRDz9s2R for ; Tue, 26 Jun 2018 18:32:01 +1000 (AEST) Received: from localhost ([::1]:51098 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fXjOI-0001Ui-Ts for incoming@patchwork.ozlabs.org; Tue, 26 Jun 2018 04:31:58 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56737) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fXjNl-0001TG-1W for qemu-devel@nongnu.org; Tue, 26 Jun 2018 04:31:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fXjNh-0003vK-Pr for qemu-devel@nongnu.org; Tue, 26 Jun 2018 04:31:25 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:39922 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fXjNh-0003v5-LN for qemu-devel@nongnu.org; Tue, 26 Jun 2018 04:31:21 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.rdu2.redhat.com [10.11.54.6]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 4360E83207 for ; Tue, 26 Jun 2018 08:31:21 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-109.ams2.redhat.com [10.36.116.109]) by smtp.corp.redhat.com (Postfix) with ESMTP id EEF922166B5D; Tue, 26 Jun 2018 08:31:20 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 231A911AB5; Tue, 26 Jun 2018 10:31:20 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Tue, 26 Jun 2018 10:31:19 +0200 Message-Id: <20180626083120.19515-1-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.6 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Tue, 26 Jun 2018 08:31:21 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Tue, 26 Jun 2018 08:31:21 +0000 (UTC) for IP:'10.11.54.6' DOMAIN:'int-mx06.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'kraxel@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH] ramfb: fix overflow 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: Gerd Hoffmann Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" > CID 1393621: (OVERFLOW_BEFORE_WIDEN) > Potentially overflowing expression "stride * s->height" with type "unsigned > int" (32 bits, unsigned) is evaluated using +32-bit arithmetic, and then used > in a context that expects an expression of type "hwaddr" (64 bits, unsigned). Fix by changing stride from uint32_t to hwaddr. Signed-off-by: Gerd Hoffmann --- hw/display/ramfb.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/display/ramfb.c b/hw/display/ramfb.c index 6867bce8ae..30f5c8da20 100644 --- a/hw/display/ramfb.c +++ b/hw/display/ramfb.c @@ -36,8 +36,8 @@ static void ramfb_fw_cfg_write(void *dev, off_t offset, size_t len) { RAMFBState *s = dev; void *framebuffer; - uint32_t stride, fourcc, format; - hwaddr addr, length; + uint32_t fourcc, format; + hwaddr stride, addr, length; s->width = be32_to_cpu(s->cfg.width); s->height = be32_to_cpu(s->cfg.height);