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 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 C3CDBC0015E for ; Tue, 1 Aug 2023 17:05:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: List-Subscribe:List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date:Message-ID: 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=HX7+5jvD4Fg77q7E4P+uuFw2UoKjqzF4IOnQvlybcg8=; b=XJQ1feKRFL9jb/rJRQ2kvykJJK CSjkQ3IJ+hHS9VDjNsnhDXnGTaSQQkojJ9L8PGWLn5ABIkBwK13cy9b0PzeKFixG794JIDHeae68u 1eXJNrfS/si0O+hzNubrPZQe75lXNwcwuwy+0a/Br6XRqkWkH35ggIkRQ9fQqGmzpJwt9pYYp6AHl NWV/s7qie5v16RWY6UN1VEVFSwPM9SNcUGv5WAVhvqp7qdxvoyzVbmprn8M1M4hR9U3fDsBqhsE2m 4KK6expXwKXGx4nPNquXEo0OVZKA44OrS05qfhxLiYjoMcqS43obLR6yH51nlDyketlZ3CEIiImfw nMPIiQ8Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qQsoD-002spD-1L; Tue, 01 Aug 2023 17:05:21 +0000 Received: from mail-qk1-x72c.google.com ([2607:f8b0:4864:20::72c]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qQsoA-002snz-0x for linux-arm-kernel@lists.infradead.org; Tue, 01 Aug 2023 17:05:19 +0000 Received: by mail-qk1-x72c.google.com with SMTP id af79cd13be357-76af2cb7404so415664385a.0 for ; Tue, 01 Aug 2023 10:05:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1690909516; x=1691514316; h=in-reply-to:from:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to; bh=HMrrdhinsi2htm92Glkvg3EFNr75XjjqiBGZcDnociY=; b=H4Dfi3Q8WHFpn6zHcNCfzdngZiQQOAAS6JhdSXjJPyuJVcY9J2QM3qdYTAsYG74Nro oXlPxRWtm6TYrp9IccIsPJ+ZBh7Wj0hkinUHUE3qAKvPVEN4ETSby67p0LZC9poQpxPf fUyjGTgBFeb55yOmiFJ4RnPKin97UJx2MaXzg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1690909516; x=1691514316; h=in-reply-to:from:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=HMrrdhinsi2htm92Glkvg3EFNr75XjjqiBGZcDnociY=; b=WM3hgtTUoeqCiO1YdR989a1wZNI7GnWc38HLShyHPM965fZs2r9szQdnXE5wEp9Rpe Upi9hQGxy8vsFBCrLBT6VJD4hVmE7npT0Lxc2xJt6olVtbBTv2RDn+vVjBkbFtALZ+2+ e2Mat3dblLmNjzf2DOcKm5Cn1PdIsRbgcV+KQ5JVpz/BbuYFqRII/C9yJDfXSSQ0tr00 kLmvfwpk6hzW4dMx3aLZn+wsqj0oBuNFhagIGSFtef/rtccmAVhSFRnvdxHq8nUz/aoT dJI6EOuRIlxgKSeoTpVimjToHxfThcUOcQD6Ofumh+KuqyXiuFi1CUdxRyuAWf+/dzDJ niJw== X-Gm-Message-State: ABy/qLYtua/ANWvEAXHq2H5N+P7pALjoAA1j1pc4ODWShiLGbCz9cc3S oZzY9zt7UqToU/98+dzlto4gtA== X-Google-Smtp-Source: APBJJlE4ziY46RD3mKzpEtHqnKuP6HtsyVQ9RR3cavBiUZbXExs3chH8vDfVFtMY1jMvJXvzlhl66w== X-Received: by 2002:a05:620a:2802:b0:765:a496:8a63 with SMTP id f2-20020a05620a280200b00765a4968a63mr19144061qkp.4.1690909516510; Tue, 01 Aug 2023 10:05:16 -0700 (PDT) Received: from [10.67.48.245] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id oo14-20020a05620a530e00b0075772c756e0sm4281213qkn.101.2023.08.01.10.05.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 01 Aug 2023 10:05:15 -0700 (PDT) Message-ID: <66e19ae3-253d-5377-5cc2-566ec3cfed49@broadcom.com> Date: Tue, 1 Aug 2023 10:05:11 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: [PATCH v3] cpufreq: brcmstb-avs-cpufreq: Fix -Warray-bounds bug To: "Gustavo A. R. Silva" , Markus Mayer , Broadcom internal kernel review list , "Rafael J. Wysocki" , Viresh Kumar , Florian Fainelli Cc: linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, Kees Cook References: From: Florian Fainelli In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230801_100518_360277_B4A2FDE1 X-CRM114-Status: GOOD ( 15.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============4352047368517288503==" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org --===============4352047368517288503== Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000018fc380601df8deb" --00000000000018fc380601df8deb Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 7/31/23 20:15, Gustavo A. R. Silva wrote: > Allocate extra space for terminating element at: > > drivers/cpufreq/brcmstb-avs-cpufreq.c: > 449 table[i].frequency = CPUFREQ_TABLE_END; > > and add code comment to make this clear. > > This fixes the following -Warray-bounds warning seen after building > ARM with multi_v7_defconfig (GCC 13): > In function 'brcm_avs_get_freq_table', > inlined from 'brcm_avs_cpufreq_init' at drivers/cpufreq/brcmstb-avs-cpufreq.c:623:15: > drivers/cpufreq/brcmstb-avs-cpufreq.c:449:28: warning: array subscript 5 is outside array bounds of 'void[60]' [-Warray-bounds=] > 449 | table[i].frequency = CPUFREQ_TABLE_END; > In file included from include/linux/node.h:18, > from include/linux/cpu.h:17, > from include/linux/cpufreq.h:12, > from drivers/cpufreq/brcmstb-avs-cpufreq.c:44: > In function 'devm_kmalloc_array', > inlined from 'devm_kcalloc' at include/linux/device.h:328:9, > inlined from 'brcm_avs_get_freq_table' at drivers/cpufreq/brcmstb-avs-cpufreq.c:437:10, > inlined from 'brcm_avs_cpufreq_init' at drivers/cpufreq/brcmstb-avs-cpufreq.c:623:15: > include/linux/device.h:323:16: note: at offset 60 into object of size 60 allocated by 'devm_kmalloc' > 323 | return devm_kmalloc(dev, bytes, flags); > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE > routines on memcpy() and help us make progress towards globally > enabling -Warray-bounds. > > Link: https://github.com/KSPP/linux/issues/324 > Fixes: de322e085995 ("cpufreq: brcmstb-avs-cpufreq: AVS CPUfreq driver for Broadcom STB SoCs") > Cc: stable@vger.kernel.org > Signed-off-by: Gustavo A. R. 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