From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:33263) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hM6GS-0002F8-9t for qemu-devel@nongnu.org; Thu, 02 May 2019 03:36:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hM6GO-00016f-VP for qemu-devel@nongnu.org; Thu, 02 May 2019 03:36:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48232) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hM6GN-0000k8-6e for qemu-devel@nongnu.org; Thu, 02 May 2019 03:36:16 -0400 From: Gerd Hoffmann Date: Thu, 2 May 2019 09:35:43 +0200 Message-Id: <20190502073543.4391-8-kraxel@redhat.com> In-Reply-To: <20190502073543.4391-1-kraxel@redhat.com> References: <20190502073543.4391-1-kraxel@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PULL 7/7] hw/usb: avoid format truncation warning when formatting port name List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Gerd Hoffmann , Aurelien Jarno , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= From: Daniel P. Berrang=C3=A9 hw/usb/hcd-xhci.c: In function =E2=80=98usb_xhci_realize=E2=80=99: hw/usb/hcd-xhci.c:3339:66: warning: =E2=80=98%d=E2=80=99 directive output= may be truncated writing between 1 and 10 bytes into a region of size 5 = [-Wformat-trunca\ tion=3D] 3339 | snprintf(port->name, sizeof(port->name), "usb2 port #= %d", i+1); | = ^~ hw/usb/hcd-xhci.c:3339:54: note: directive argument in the range [1, 2147= 483647] 3339 | snprintf(port->name, sizeof(port->name), "usb2 port #= %d", i+1); | ^~~~~~~~~~~~= ~~~ The xhci code formats the port name into a fixed length buffer which is only large enough to hold port numbers upto 5 digits in decimal representation. We're never going to have a port number that large, so aserting the port number is sensible is sufficient to tell GCC the formatted string won't be truncated. Signed-off-by: Daniel P. Berrang=C3=A9 Message-Id: <20190412121626.19829-5-berrange@redhat.com> Signed-off-by: Gerd Hoffmann --- hw/usb/hcd-xhci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index d8472b4fea7f..9f8f9e45eceb 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -3336,6 +3336,7 @@ static void usb_xhci_init(XHCIState *xhci) USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL | USB_SPEED_MASK_HIGH; + assert(i < MAXPORTS); snprintf(port->name, sizeof(port->name), "usb2 port #%d", i+= 1); speedmask |=3D port->speedmask; } @@ -3349,6 +3350,7 @@ static void usb_xhci_init(XHCIState *xhci) } port->uport =3D &xhci->uports[i]; port->speedmask =3D USB_SPEED_MASK_SUPER; + assert(i < MAXPORTS); snprintf(port->name, sizeof(port->name), "usb3 port #%d", i+= 1); speedmask |=3D port->speedmask; } --=20 2.18.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E105C43219 for ; Thu, 2 May 2019 07:42:06 +0000 (UTC) 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.kernel.org (Postfix) with ESMTPS id 4BA5520873 for ; Thu, 2 May 2019 07:42:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4BA5520873 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([127.0.0.1]:46706 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hM6M1-0007Kc-IL for qemu-devel@archiver.kernel.org; Thu, 02 May 2019 03:42:05 -0400 Received: from eggs.gnu.org ([209.51.188.92]:33263) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hM6GS-0002F8-9t for qemu-devel@nongnu.org; Thu, 02 May 2019 03:36:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hM6GO-00016f-VP for qemu-devel@nongnu.org; Thu, 02 May 2019 03:36:18 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48232) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hM6GN-0000k8-6e for qemu-devel@nongnu.org; Thu, 02 May 2019 03:36:16 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7A775859FF; Thu, 2 May 2019 07:35:50 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-116-45.ams2.redhat.com [10.36.116.45]) by smtp.corp.redhat.com (Postfix) with ESMTP id 045BC5630B; Thu, 2 May 2019 07:35:48 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id BD5581753B; Thu, 2 May 2019 09:35:43 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Thu, 2 May 2019 09:35:43 +0200 Message-Id: <20190502073543.4391-8-kraxel@redhat.com> In-Reply-To: <20190502073543.4391-1-kraxel@redhat.com> References: <20190502073543.4391-1-kraxel@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.26]); Thu, 02 May 2019 07:35:50 +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: [Qemu-devel] [PULL 7/7] hw/usb: avoid format truncation warning when formatting port name 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 , Aurelien Jarno Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Message-ID: <20190502073543.xuOJIHiEyuAzFnVbanWNi7CbMUy3a0_f5wOMdKvnANo@z> From: Daniel P. Berrang=C3=A9 hw/usb/hcd-xhci.c: In function =E2=80=98usb_xhci_realize=E2=80=99: hw/usb/hcd-xhci.c:3339:66: warning: =E2=80=98%d=E2=80=99 directive output= may be truncated writing between 1 and 10 bytes into a region of size 5 = [-Wformat-trunca\ tion=3D] 3339 | snprintf(port->name, sizeof(port->name), "usb2 port #= %d", i+1); | = ^~ hw/usb/hcd-xhci.c:3339:54: note: directive argument in the range [1, 2147= 483647] 3339 | snprintf(port->name, sizeof(port->name), "usb2 port #= %d", i+1); | ^~~~~~~~~~~~= ~~~ The xhci code formats the port name into a fixed length buffer which is only large enough to hold port numbers upto 5 digits in decimal representation. We're never going to have a port number that large, so aserting the port number is sensible is sufficient to tell GCC the formatted string won't be truncated. Signed-off-by: Daniel P. Berrang=C3=A9 Message-Id: <20190412121626.19829-5-berrange@redhat.com> Signed-off-by: Gerd Hoffmann --- hw/usb/hcd-xhci.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c index d8472b4fea7f..9f8f9e45eceb 100644 --- a/hw/usb/hcd-xhci.c +++ b/hw/usb/hcd-xhci.c @@ -3336,6 +3336,7 @@ static void usb_xhci_init(XHCIState *xhci) USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL | USB_SPEED_MASK_HIGH; + assert(i < MAXPORTS); snprintf(port->name, sizeof(port->name), "usb2 port #%d", i+= 1); speedmask |=3D port->speedmask; } @@ -3349,6 +3350,7 @@ static void usb_xhci_init(XHCIState *xhci) } port->uport =3D &xhci->uports[i]; port->speedmask =3D USB_SPEED_MASK_SUPER; + assert(i < MAXPORTS); snprintf(port->name, sizeof(port->name), "usb3 port #%d", i+= 1); speedmask |=3D port->speedmask; } --=20 2.18.1