From patchwork Mon Aug 28 22:25:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nick Desaulniers X-Patchwork-Id: 13368385 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 73B59C83F14 for ; Mon, 28 Aug 2023 22:26:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233676AbjH1W0S (ORCPT ); Mon, 28 Aug 2023 18:26:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35052 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231827AbjH1WZ6 (ORCPT ); Mon, 28 Aug 2023 18:25:58 -0400 Received: from mail-yw1-x1149.google.com (mail-yw1-x1149.google.com [IPv6:2607:f8b0:4864:20::1149]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD07E13D for ; Mon, 28 Aug 2023 15:25:55 -0700 (PDT) Received: by mail-yw1-x1149.google.com with SMTP id 00721157ae682-5924b2aac52so50772597b3.2 for ; Mon, 28 Aug 2023 15:25:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1693261555; x=1693866355; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=WL1tQymiA0QNtSV27nV5+wlwcB60k6N2NSD+c5q8HQg=; b=JoHOoN5AHuQ86eXhnjG3U070yK9cvNyS2AVvroFNhguy50VpeQ6WU9xS9/gk+nVAW8 cB8tMKGkgUUYQ7fBsfIXzzgEUTzDq1UXuakUOvqqjLSyjTSUfSlvxTT2LARSAcZCsL+6 qb2mda588RKdSlMncA/n0D8yWn/Pb/YH/EzPY/9s+I2xe65rmxP+Zibu7Uj+CeUAwaFK LnYAkfhxfXxdUg66d9HTkdIepibDIgth6uCGBkmKPmIdVHDcWJKPY2US7FNfuaioy3Z6 Z0kBxnEJ61tDFKgoC79rSf2QJwuSxRyoBJCn1REEKlemHGgSt2TQ/310romCB3WlO2oN tO9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693261555; x=1693866355; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=WL1tQymiA0QNtSV27nV5+wlwcB60k6N2NSD+c5q8HQg=; b=aGF6f6yl0xQcG2DAy5tpg/EOZHq37ovgykuUgt8qbcY0W3qYdOi3dPeoKUlGI3lNea t0Dpe9MI3oW7Ifw+E7Ncp5HkO2k/ttW4gsaxyaZ2s4Bcgv2T9ogp50epMtug8cl1wq4d J4cegadZAE2TKQq340M89q2eVkSuh9BxL/axg5IAeD1Bj0AvK1oLKBXnS0mDrHrm9G5j VonapotOxaZkZaEGU4RnyoWEAtZKmHLrruy7JTqgNfV1hVafGGCjRuT76q8/mo7YDH1n E7FDAtqTP+ZhQMhIHxIM0LuEJZRrMKalWwLaGyVZC09+ULifjCX5qyBMb6A9NMmCZ2Li V/3Q== X-Gm-Message-State: AOJu0Yz95aS1jvbFihafrsb1/c45XPHjRKQt1R3EQw5gBVYAomw+fZwt ovIyUnH6CB+E+K2xRE+Vhzwr5Qb4OFFT+zpKXSM= X-Google-Smtp-Source: AGHT+IEHx1L4auj/EdI7SADc9H3MwvX/vPnn5w8vp1/S1Yz4HvTE6wVG99CwlClV81ou70LXLC9pxdtTeMr8Ap710PU= X-Received: from ndesaulniers-desktop.svl.corp.google.com ([2620:15c:2d1:203:b64:7817:9989:9eba]) (user=ndesaulniers job=sendgmr) by 2002:a81:ae06:0:b0:573:87b9:7ee9 with SMTP id m6-20020a81ae06000000b0057387b97ee9mr829678ywh.4.1693261555125; Mon, 28 Aug 2023 15:25:55 -0700 (PDT) Date: Mon, 28 Aug 2023 15:25:48 -0700 In-Reply-To: <20230828-scsi_fortify-v1-0-8dde624a3b2c@google.com> Mime-Version: 1.0 References: <20230828-scsi_fortify-v1-0-8dde624a3b2c@google.com> X-Developer-Key: i=ndesaulniers@google.com; a=ed25519; pk=eMOZeIQ4DYNKvsNmDNzVbQZqpdex34Aww3b8Ah957X4= X-Developer-Signature: v=1; a=ed25519-sha256; t=1693261549; l=3338; i=ndesaulniers@google.com; s=20230823; h=from:subject:message-id; bh=QVZghMLPP42usKlaJQTZjiZHzXDWVKPfY+QwZHJyIKk=; b=PtTKGhzagQppTiG/eusxtBe/ncoCdao9ylHQtdEesrL9MNPm094c3VNQzvmSFiFi+bCIdx0j0 /87XN3v+sIwCZ8O5qbGc7RbENymwoeWEuxMauBVAgPfdGfwDIBsvuap X-Mailer: b4 0.12.3 Message-ID: <20230828-scsi_fortify-v1-2-8dde624a3b2c@google.com> Subject: [PATCH 2/2] scsi: myrs: fix -Wfortify-source From: Nick Desaulniers To: Hannes Reinecke , "James E.J. Bottomley" , "Martin K. Petersen" , Nathan Chancellor Cc: Tom Rix , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, Nick Desaulniers Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org clang-18 has improved its support for detecting operations that will truncate values at runtime via -Wfortify-source. Fixes the warning: drivers/scsi/myrs.c:1089:10: warning: 'snprintf' will always be truncated; specified size is 32, but format string expands to at least 34 [-Wfortify-source] In particular, the string literal "physical device - not rebuilding\n" is indeed 34B by my count. When we have a string literal that does not contain any format flags, rather than use snprintf (sometimes with a size that's too small), let's use sprintf. This is pattern is cleaned up throughout the file. Reported-by: Nathan Chancellor Closes: https://github.com/ClangBuiltLinux/linux/issues/1923 Signed-off-by: Nick Desaulniers --- drivers/scsi/myrs.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/myrs.c b/drivers/scsi/myrs.c index a1eec65a9713..729f08379bd0 100644 --- a/drivers/scsi/myrs.c +++ b/drivers/scsi/myrs.c @@ -939,7 +939,7 @@ static ssize_t raid_state_show(struct device *dev, int ret; if (!sdev->hostdata) - return snprintf(buf, 16, "Unknown\n"); + return sprintf(buf, "Unknown\n"); if (sdev->channel >= cs->ctlr_info->physchan_present) { struct myrs_ldev_info *ldev_info = sdev->hostdata; @@ -1058,7 +1058,7 @@ static ssize_t raid_level_show(struct device *dev, const char *name = NULL; if (!sdev->hostdata) - return snprintf(buf, 16, "Unknown\n"); + return sprintf(buf, "Unknown\n"); if (sdev->channel >= cs->ctlr_info->physchan_present) { struct myrs_ldev_info *ldev_info; @@ -1086,7 +1086,7 @@ static ssize_t rebuild_show(struct device *dev, unsigned char status; if (sdev->channel < cs->ctlr_info->physchan_present) - return snprintf(buf, 32, "physical device - not rebuilding\n"); + return sprintf(buf, "physical device - not rebuilding\n"); ldev_info = sdev->hostdata; ldev_num = ldev_info->ldev_num; @@ -1102,7 +1102,7 @@ static ssize_t rebuild_show(struct device *dev, (size_t)ldev_info->rbld_lba, (size_t)ldev_info->cfg_devsize); } else - return snprintf(buf, 32, "not rebuilding\n"); + return sprintf(buf, "not rebuilding\n"); } static ssize_t rebuild_store(struct device *dev, @@ -1190,7 +1190,7 @@ static ssize_t consistency_check_show(struct device *dev, unsigned short ldev_num; if (sdev->channel < cs->ctlr_info->physchan_present) - return snprintf(buf, 32, "physical device - not checking\n"); + return sprintf(buf, "physical device - not checking\n"); ldev_info = sdev->hostdata; if (!ldev_info) @@ -1202,7 +1202,7 @@ static ssize_t consistency_check_show(struct device *dev, (size_t)ldev_info->cc_lba, (size_t)ldev_info->cfg_devsize); else - return snprintf(buf, 32, "not checking\n"); + return sprintf(buf, "not checking\n"); } static ssize_t consistency_check_store(struct device *dev, @@ -1376,7 +1376,7 @@ static ssize_t processor_show(struct device *dev, info->cpu[1].cpu_name, second_processor, info->cpu[1].cpu_count); else - ret = snprintf(buf, 64, "1: absent\n2: absent\n"); + ret = sprintf(buf, "1: absent\n2: absent\n"); return ret; }