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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3C418C072A2 for ; Wed, 15 Nov 2023 19:41:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229678AbjKOTlX (ORCPT ); Wed, 15 Nov 2023 14:41:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234717AbjKOTlW (ORCPT ); Wed, 15 Nov 2023 14:41:22 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82967B9 for ; Wed, 15 Nov 2023 11:41:18 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F36A0C433C8; Wed, 15 Nov 2023 19:41:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700077278; bh=0+ytu81NdarKojl01bVLXYrMa5aLBWuyl5+P6LnV/IY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M/G0cwjd+ABH9sx0jMO01PPwGM+ZlaTKCtz0X2ecGGCOxPTyFg8tJjBYxW1TwVJmS 7+W924eAcaUo1YwH8F7xSslxvYcWv3LxtKXUdByGnUjvO9orW0yXy2Obura8xRIT2z 6IDSXAq8FlWZI8uhMvppVflWTQy0q1zZJ9RrXY+8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Zhang Rui , kernel test robot , Guenter Roeck , Sasha Levin Subject: [PATCH 6.6 204/603] hwmon: (coretemp) Fix potentially truncated sysfs attribute name Date: Wed, 15 Nov 2023 14:12:29 -0500 Message-ID: <20231115191627.377362829@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115191613.097702445@linuxfoundation.org> References: <20231115191613.097702445@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhang Rui [ Upstream commit bbfff736d30e5283ad09e748caff979d75ddef7f ] When build with W=1 and "-Werror=format-truncation", below error is observed in coretemp driver, drivers/hwmon/coretemp.c: In function 'create_core_data': >> drivers/hwmon/coretemp.c:393:34: error: '%s' directive output may be truncated writing likely 5 or more bytes into a region of size between 3 and 13 [-Werror=format-truncation=] 393 | "temp%d_%s", attr_no, suffixes[i]); | ^~ drivers/hwmon/coretemp.c:393:26: note: assuming directive output of 5 bytes 393 | "temp%d_%s", attr_no, suffixes[i]); | ^~~~~~~~~~~ drivers/hwmon/coretemp.c:392:17: note: 'snprintf' output 7 or more bytes (assuming 22) into a destination of size 19 392 | snprintf(tdata->attr_name[i], CORETEMP_NAME_LENGTH, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 393 | "temp%d_%s", attr_no, suffixes[i]); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors Given that 1. '%d' could take 10 charactors, 2. '%s' could take 10 charactors ("crit_alarm"), 3. "temp", "_" and the NULL terminator take 6 charactors, fix the problem by increasing CORETEMP_NAME_LENGTH to 28. Signed-off-by: Zhang Rui Fixes: 7108b80a542b ("hwmon/coretemp: Handle large core ID value") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202310200443.iD3tUbbK-lkp@intel.com/ Link: https://lore.kernel.org/r/20231025122316.836400-1-rui.zhang@intel.com Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin --- drivers/hwmon/coretemp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index eba94f68585a8..ba82d1e79c131 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -42,7 +42,7 @@ MODULE_PARM_DESC(tjmax, "TjMax value in degrees Celsius"); #define PKG_SYSFS_ATTR_NO 1 /* Sysfs attribute for package temp */ #define BASE_SYSFS_ATTR_NO 2 /* Sysfs Base attr no for coretemp */ #define NUM_REAL_CORES 128 /* Number of Real cores per cpu */ -#define CORETEMP_NAME_LENGTH 19 /* String Length of attrs */ +#define CORETEMP_NAME_LENGTH 28 /* String Length of attrs */ #define MAX_CORE_ATTRS 4 /* Maximum no of basic attrs */ #define TOTAL_ATTRS (MAX_CORE_ATTRS + 1) #define MAX_CORE_DATA (NUM_REAL_CORES + BASE_SYSFS_ATTR_NO) -- 2.42.0