From patchwork Thu Nov 2 18:55:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Justin Stitt X-Patchwork-Id: 13444138 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9CEECC4167B for ; Thu, 2 Nov 2023 18:56:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:Cc:To:From: Subject:Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=32K79yUePS03VyWxcYP10LK3dnc9q0LtbXtqJtsNvV4=; b=MOTnVuRKgNqJfqcCqQC8y/mkY8 rFy3Gh24H9T9uuFJlj2xgkse2KoWU9iVdg6oGn45ZvAXmrT7mE7BVbx5LvOK9HHoCEovq//0CkzHN 3lKlVcOlGS7H2WRDjxvcqkNzxsfBSoBzYTj2tnyfTbLRP2IERIptBZ9JrRNMFOdV1Aw8LlASUxnv2 l+c5JfkHt14dUJ/a4aK/HwfSeAGvW2vpgCGwmGGUMedQdPQRw7EYF3gCefllf2ynfjH5I81yyh1Gh aj8BiD8pGeQSrIGnKZV5NrcJSGiDL8UFR8d/WqEzdJ6+BoO+hATmUFFT3s+uD1FeID01IOZppzcY5 9Z7uMv/w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qycrI-00A7Og-24; Thu, 02 Nov 2023 18:56:00 +0000 Received: from mail-oo1-xc49.google.com ([2607:f8b0:4864:20::c49]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qycrB-00A7Lr-0V for linux-mediatek@lists.infradead.org; Thu, 02 Nov 2023 18:55:58 +0000 Received: by mail-oo1-xc49.google.com with SMTP id 006d021491bc7-581e2fc1178so1516066eaf.0 for ; Thu, 02 Nov 2023 11:55:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1698951351; x=1699556151; darn=lists.infradead.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=32K79yUePS03VyWxcYP10LK3dnc9q0LtbXtqJtsNvV4=; b=E+omKZfjEtjonhq3DuugHl6yWY2ugIe4RKgdPR7cZnVw6NeNceaj+o00tBpiS1f1EZ FC5CuBrQYadvdIcfMrRORmn+IRNumZ3CrLmRTDTA3Ql1GocbELfCj40OzKQ7fMjejFer ZezPaeJsGBbN4vX81vrn5lSpShMYwTs8Q0+yx8AquH1iEHUqHM7rvX7lQbsrprcVgz7c u2ua2oJloR+GRa4j/CrU7fT3JPz98pMV91tfrEC/n36AzO64Mquds7eEWkL8cwwzlgOa sjgFIpUZJ6/t8xKsxyv9yukceM7FwLyhKULtLKW9ypPjbAD9lCe6Yged0BGzScH+AWp9 zG6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698951351; x=1699556151; 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=32K79yUePS03VyWxcYP10LK3dnc9q0LtbXtqJtsNvV4=; b=OJwHRLQNUl1MpgG7KZmpdsSpZKV1/I97+2OmAEZxeTUhUzGTkFhb7DIj+CnFMWmk3X PgSFPIJ9olbngFFEkHM0vDym+0sPrcMQt9Snv7/OUoRjTaDESFIy5KFJyH/e6/RjqrlX IqgqWtiH+Z2hSeLs9a0y0hc2lBYDnWplZnwTF8P7bTDtmbwZpgIsrpRlATmCW+laS3IT 2bMwj034gJHBGVEQvtMiSNkE9EdZvk+ALnuo6+UVx5fuN8TAqg75OEm1GCS/MNaX0gcx uRYRJIUYkGgME0w/vtdXnF/CRWAKSxTUudscOg5AJBqsYk1TRw2qNyRsB6K2KGEidl8q b3zw== X-Gm-Message-State: AOJu0YwzvkidUldV2furk/tlBWc2mnlgZesCXGlXDOgKPhzJ1eBwE39L eEVyGRC1nUjDyzKUwdJj4uqAWzCYhHqbJRsJvA== X-Google-Smtp-Source: AGHT+IEDkF7Oi1IvBAECUO1D2BZ/WfZR7U3roLxCuXWWPqD/1I8emyNHZYAH7mCiA7sr/QX8V5tqqhhnpUgVQ3gPTg== X-Received: from jstitt-linux1.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:23b5]) (user=justinstitt job=sendgmr) by 2002:a05:6870:b629:b0:1e9:a86f:ec44 with SMTP id cm41-20020a056870b62900b001e9a86fec44mr375267oab.2.1698951351424; Thu, 02 Nov 2023 11:55:51 -0700 (PDT) Date: Thu, 02 Nov 2023 18:55:43 +0000 In-Reply-To: <20231102-ethtool_puts_impl-v4-0-14e1e9278496@google.com> Mime-Version: 1.0 References: <20231102-ethtool_puts_impl-v4-0-14e1e9278496@google.com> X-Developer-Key: i=justinstitt@google.com; a=ed25519; pk=tC3hNkJQTpNX/gLKxTNQKDmiQl6QjBNCGKJINqAdJsE= X-Developer-Signature: v=1; a=ed25519-sha256; t=1698951347; l=1990; i=justinstitt@google.com; s=20230717; h=from:subject:message-id; bh=5WZCSRmn5I240grrVCw4x/4n7/d4Ou3ZeMgHOu6QRHU=; b=1nZEvR6w+gOAIckxQFx/hzREhfGTALc08T+ct+mnZ2DmKk8uycd6z6khwq8TbMAwCu9Ezqp/H Dfu4ZT5igmOB2KC0bZOz7azBMQm7Hj6sTI87CdS0CAZqv2537ilCpzL X-Mailer: b4 0.12.3 Message-ID: <20231102-ethtool_puts_impl-v4-2-14e1e9278496@google.com> Subject: [PATCH net-next v4 2/3] checkpatch: add ethtool_sprintf rules From: Justin Stitt To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Shay Agroskin , Arthur Kiyanovski , David Arinzon , Noam Dagan , Saeed Bishara , Rasesh Mody , Sudarsana Kalluru , GR-Linux-NIC-Dev@marvell.com, Dimitris Michailidis , Yisen Zhuang , Salil Mehta , Jesse Brandeburg , Tony Nguyen , Louis Peens , Shannon Nelson , Brett Creeley , drivers@pensando.io, "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Ronak Doshi , VMware PV-Drivers Reviewers , Andy Whitcroft , Joe Perches , Dwaipayan Ray , Lukas Bulwahn , Hauke Mehrtens , Andrew Lunn , Florian Fainelli , Vladimir Oltean , " =?utf-8?b?QXLEsW7DpyDDnE5BTA==?= " , Daniel Golle , Landen Chao , DENG Qingfang , Sean Wang , Matthias Brugger , AngeloGioacchino Del Regno , Linus Walleij , " =?utf-8?q?Alvin_=C5=A0ipraga?= " , Wei Fang , Shenwei Wang , Clark Wang , NXP Linux Team , Lars Povlsen , Steen Hegelund , Daniel Machon , UNGLinuxDriver@microchip.com, Jiawen Wu , Mengyuan Lou , Heiner Kallweit , Russell King , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Nick Desaulniers , Nathan Chancellor , Kees Cook , intel-wired-lan@lists.osuosl.org, oss-drivers@corigine.com, linux-hyperv@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, bpf@vger.kernel.org, Justin Stitt X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231102_115553_193533_58A1D819 X-CRM114-Status: GOOD ( 10.03 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Add some warnings for using ethtool_sprintf() where a simple ethtool_puts() would suffice. The two cases are: 1) Use ethtool_sprintf() with just two arguments: | ethtool_sprintf(&data, driver[i].name); or 2) Use ethtool_sprintf() with a standalone "%s" fmt string: | ethtool_sprintf(&data, "%s", driver[i].name); The former may cause -Wformat-security warnings while the latter is just not preferred. Both are safely in the category of warnings, not errors. Signed-off-by: Justin Stitt --- scripts/checkpatch.pl | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 7d16f863edf1..9369ce1d15c5 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -7020,6 +7020,25 @@ sub process { "Prefer strscpy, strscpy_pad, or __nonstring over strncpy - see: https://github.com/KSPP/linux/issues/90\n" . $herecurr); } +# ethtool_sprintf uses that should likely be ethtool_puts + if ($line =~ /\bethtool_sprintf\s*\(\s*$FuncArg\s*,\s*$FuncArg\s*\)/) { + if (WARN("PREFER_ETHTOOL_PUTS", + "Prefer ethtool_puts over ethtool_sprintf with only two arguments\n" . $herecurr) && + $fix) { + $fixed[$fixlinenr] =~ s/\bethtool_sprintf\s*\(\s*($FuncArg)\s*,\s*($FuncArg)/ethtool_puts($1, $7)/; + } + } + + # use $rawline because $line loses %s via sanitization and thus we can't match against it. + if ($rawline =~ /\bethtool_sprintf\s*\(\s*$FuncArg\s*,\s*\"\%s\"\s*,\s*$FuncArg\s*\)/) { + if (WARN("PREFER_ETHTOOL_PUTS", + "Prefer ethtool_puts over ethtool_sprintf with standalone \"%s\" specifier\n" . $herecurr) && + $fix) { + $fixed[$fixlinenr] =~ s/\bethtool_sprintf\s*\(\s*($FuncArg)\s*,\s*"\%s"\s*,\s*($FuncArg)/ethtool_puts($1, $7)/; + } + } + + # typecasts on min/max could be min_t/max_t if ($perl_version_ok && defined $stat &&