From patchwork Sun Feb 12 01:39:28 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Max Reitz X-Patchwork-Id: 93828 Delivered-To: patch@linaro.org Received: by 10.140.20.99 with SMTP id 90csp521419qgi; Sat, 11 Feb 2017 18:01:03 -0800 (PST) X-Received: by 10.200.0.25 with SMTP id a25mr15295457qtg.191.1486864863559; Sat, 11 Feb 2017 18:01:03 -0800 (PST) Return-Path: Received: from lists.gnu.org (lists.gnu.org. [2001:4830:134:3::11]) by mx.google.com with ESMTPS id m29si4418750qki.224.2017.02.11.18.01.03 for (version=TLS1 cipher=AES128-SHA bits=128/128); Sat, 11 Feb 2017 18:01:03 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-devel-bounces+patch=linaro.org@nongnu.org Received: from localhost ([::1]:50352 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ccjTJ-0001fj-3m for patch@linaro.org; Sat, 11 Feb 2017 21:01:01 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47536) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ccj8g-0007j0-19 for qemu-devel@nongnu.org; Sat, 11 Feb 2017 20:39:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ccj8e-0007VW-Nq for qemu-devel@nongnu.org; Sat, 11 Feb 2017 20:39:42 -0500 Received: from mx1.redhat.com ([209.132.183.28]:57046) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ccj8b-0007UH-NK; Sat, 11 Feb 2017 20:39:37 -0500 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (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 D0B0461B8C; Sun, 12 Feb 2017 01:39:37 +0000 (UTC) Received: from localhost (ovpn-204-18.brq.redhat.com [10.40.204.18]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id v1C1dafm009652 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sat, 11 Feb 2017 20:39:37 -0500 From: Max Reitz To: qemu-block@nongnu.org Date: Sun, 12 Feb 2017 02:39:28 +0100 Message-Id: <20170212013929.6793-3-mreitz@redhat.com> In-Reply-To: <20170212013440.5919-1-mreitz@redhat.com> References: <20170212013440.5919-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.39]); Sun, 12 Feb 2017 01:39:37 +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 20/21] qemu-img: Use qemu_strtoul() rather than raw strtoul() 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: Peter Maydell , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" From: Peter Maydell Some of the argument parsing in qemu-img uses strtoul() to parse integer arguments. This is tricky to get correct and in fact the code does not get it right, because it assigns the result of strtoul() to an 'int' variable and then tries to check for > INT_MAX. Coverity correctly complains that the comparison is always false. Rewrite to use qemu_strtoul(), which has a saner convention for reporting conversion failures. (Fixes CID 1356421, CID 1356422, CID 1356423.) Signed-off-by: Peter Maydell Message-id: 1486744104-15590-2-git-send-email-peter.maydell@linaro.org Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Max Reitz --- qemu-img.c | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) -- 2.11.0 diff --git a/qemu-img.c b/qemu-img.c index 933876cfe1..38266e56b0 100644 --- a/qemu-img.c +++ b/qemu-img.c @@ -3623,24 +3623,24 @@ static int img_bench(int argc, char **argv) break; case 'c': { - char *end; - errno = 0; - count = strtoul(optarg, &end, 0); - if (errno || *end || count > INT_MAX) { + unsigned long res; + + if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { error_report("Invalid request count specified"); return 1; } + count = res; break; } case 'd': { - char *end; - errno = 0; - depth = strtoul(optarg, &end, 0); - if (errno || *end || depth > INT_MAX) { + unsigned long res; + + if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { error_report("Invalid queue depth specified"); return 1; } + depth = res; break; } case 'f': @@ -3707,24 +3707,24 @@ static int img_bench(int argc, char **argv) break; case OPTION_PATTERN: { - char *end; - errno = 0; - pattern = strtoul(optarg, &end, 0); - if (errno || *end || pattern > 0xff) { + unsigned long res; + + if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > 0xff) { error_report("Invalid pattern byte specified"); return 1; } + pattern = res; break; } case OPTION_FLUSH_INTERVAL: { - char *end; - errno = 0; - flush_interval = strtoul(optarg, &end, 0); - if (errno || *end || flush_interval > INT_MAX) { + unsigned long res; + + if (qemu_strtoul(optarg, NULL, 0, &res) < 0 || res > INT_MAX) { error_report("Invalid flush interval specified"); return 1; } + flush_interval = res; break; } case OPTION_NO_DRAIN: