From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f170.google.com (mail-pl1-f170.google.com [209.85.214.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BB9C22F80 for ; Tue, 27 Jul 2021 21:17:00 +0000 (UTC) Received: by mail-pl1-f170.google.com with SMTP id a20so118614plm.0 for ; Tue, 27 Jul 2021 14:17:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Y9wMesWb3kMvGhORYmMr8FR6o9+jwEvZSo1EsZxY8W0=; b=BN7P01Ur0nT1MgFEaFehSRb7jJppIMvpuqQP+s+oBiWS7VXbf/RvYexr0Hx4+J+tRF ub6d2NuQ/h6uhZ5C5OC3+rwkID8I367GLLdmYSUSQoeXhXVWNYV2m0sd3TTyLfRvYZRi tIFkyuHmHnqC70kWh05pztablIQYnYXX+GWGQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Y9wMesWb3kMvGhORYmMr8FR6o9+jwEvZSo1EsZxY8W0=; b=j0sAXOnnrXoyb0+BvElgQ4RhR9naj0FlvFI41RSLGCKthcLM2u78tP1trQuQU1IzI8 zBMJxggxRLnKuyeeJuqY+dMcQhpBuYw2H2lIWShTof28chIldFIf82fvf85pJmC0QpsA nN2UPzRnLjNzUskeEcPRhhq3HGQEsajgEBHf//SQ8Todg4+hX7HyperVwzk7JKoyPfrH 9TUeis+DDxrFyOeO+NAJmRTfh0IXyYDbl4ssY27FfG6LpU5A93ef8tc6nphEOEqNP3SU cSj6wb2Ao76MwFkbFONRuKiPNMIqL0SX+/TiSp4cuHJcKGH+xhIHvL9lcDbQOA1ekyoW v3nw== X-Gm-Message-State: AOAM533RmpxYDqOnsXRNROWnnCrcxDjk+na5cmAeGvPP3y4svnchHVf1 1KVLWBwMIrLBXGaIR7csIiwHuA== X-Google-Smtp-Source: ABdhPJwBzhqNz9CV9N0TSyJ7ZTBhPPhkncXxe8pHuZBIHnuiml3joPIijrND7KmjOEKulsBBdR6JNQ== X-Received: by 2002:a62:584:0:b029:32e:3b57:a1c6 with SMTP id 126-20020a6205840000b029032e3b57a1c6mr24589168pff.13.1627420620372; Tue, 27 Jul 2021 14:17:00 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id lk5sm3712997pjb.53.2021.07.27.14.16.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jul 2021 14:16:58 -0700 (PDT) From: Kees Cook To: linux-hardening@vger.kernel.org Cc: Kees Cook , "Gustavo A. R. Silva" , Keith Packard , Greg Kroah-Hartman , Andrew Morton , linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-staging@lists.linux.dev, linux-block@vger.kernel.org, linux-kbuild@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH 58/64] powerpc: Split memset() to avoid multi-field overflow Date: Tue, 27 Jul 2021 13:58:49 -0700 Message-Id: <20210727205855.411487-59-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210727205855.411487-1-keescook@chromium.org> References: <20210727205855.411487-1-keescook@chromium.org> Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=970; h=from:subject; bh=EqAYyR61If64Fj2IYKFg3jD8wd3YsI3R0DZAgupjjpE=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhAHON8m2NPAIDr9Q/N7SXLMGlDKKJPMFM5SUAuhto 7+vlDg+JAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYQBzjQAKCRCJcvTf3G3AJq+CEA Ca4qR9dFfukeDpwBivSWmdN4IXrLxxds4i79tyF2RZ1NetlF3zQFjf0dOJJ6NfqCZjinnNwHjnPaFi 9x4UwneOOuPj/4rf8k7cSpmM2UreUaAAA8VP/jFKg8vdwSBqelmbZjm8ng/qha6pxe9jqRvhE2RWKP qnrUYIUXlqe7N3FgL/8eOB67y/Un3Rfqu05z/doNPDcGWYTfIhpaZu3n+amLx44YduL03EwcMECH/l NDarqGZ78zXiW9XBAw38H8M3+unTerG5RPPulpFMa3XJ+hy0ln0RAD/CKthoOCrGmjVHEls689FYmk 47Xi02bCJdYfIgjqNVNZcc95yunNV29nLCcUCjqRA9qZpvkMrJWQANAATLtxAcI+/txMZUwS94jUFC otBX6K+dP0tshHI5p9QXMMjeOFJUZsvIm5n+eNLtqZADzbxH5992mbjlaJZzSynXuRU7LnKYFwp99u ACzU3xk+GoPHSQbfn0SU7L/H8QNlNuzxIiWmgfUKY2AXa7GfFeO+JPWTK/H/PczC9Or0vmzcwp+j06 gmLqgbtlJS5EyLTqxwdJDfRPF9CCi/hV2nu4l+oo6Pue1qSXQEmcxzqGPzn+HR7xkb5suJeevW+l7Z gDF++XCKaI8rWqYNDAdfLYj6eQLBZMJ8AM/75DxdC9t3gUyhjbCYaLueTqow== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit In preparation for FORTIFY_SOURCE performing compile-time and run-time field bounds checking for memset(), avoid intentionally writing across neighboring fields. Instead of writing across a field boundary with memset(), move the call to just the array, and an explicit zeroing of the prior field. Signed-off-by: Kees Cook --- drivers/macintosh/smu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c index 94fb63a7b357..59ce431da7ef 100644 --- a/drivers/macintosh/smu.c +++ b/drivers/macintosh/smu.c @@ -848,7 +848,8 @@ int smu_queue_i2c(struct smu_i2c_cmd *cmd) cmd->read = cmd->info.devaddr & 0x01; switch(cmd->info.type) { case SMU_I2C_TRANSFER_SIMPLE: - memset(&cmd->info.sublen, 0, 4); + cmd->info.sublen = 0; + memset(&cmd->info.subaddr, 0, 3); break; case SMU_I2C_TRANSFER_COMBINED: cmd->info.devaddr &= 0xfe; -- 2.30.2 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 655A2C4338F for ; Tue, 27 Jul 2021 21:17:41 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 32D5460BD3 for ; Tue, 27 Jul 2021 21:17:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 32D5460BD3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 4E2866EAAE; Tue, 27 Jul 2021 21:17:40 +0000 (UTC) Received: from mail-pl1-x635.google.com (mail-pl1-x635.google.com [IPv6:2607:f8b0:4864:20::635]) by gabe.freedesktop.org (Postfix) with ESMTPS id C914D6EAAD for ; Tue, 27 Jul 2021 21:17:01 +0000 (UTC) Received: by mail-pl1-x635.google.com with SMTP id d17so26794plh.10 for ; Tue, 27 Jul 2021 14:17:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Y9wMesWb3kMvGhORYmMr8FR6o9+jwEvZSo1EsZxY8W0=; b=BN7P01Ur0nT1MgFEaFehSRb7jJppIMvpuqQP+s+oBiWS7VXbf/RvYexr0Hx4+J+tRF ub6d2NuQ/h6uhZ5C5OC3+rwkID8I367GLLdmYSUSQoeXhXVWNYV2m0sd3TTyLfRvYZRi tIFkyuHmHnqC70kWh05pztablIQYnYXX+GWGQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Y9wMesWb3kMvGhORYmMr8FR6o9+jwEvZSo1EsZxY8W0=; b=gGRtwgmoh16mz3qdxOnKgosSxeRcOVneSqxXXMml6e3Vnyq8UMt2evQkSWoIVKrQMb mfHq2/9wuoSm7WjnZZh+SQvKrwLl8GSYyIAgVtcYK6ERTmtJWfh3sVyeofAxvYvJH7Gs /xTdhjq0RO8n3IkHidIcrywAardeOUZ2P3Zxfqm/U3P3S2dLIff8Z9h6ZbhhtsHknSJm OFqF/Iecvh8VtuLMWZqKEen0J87apM9gT23kn6bMKoW678UkBG1QGPAJl9S6Yejujw7P l5EE/kFWJX/pxK1QB8TmGBjd4xEJugqvvcP+FvmiUJyFwz7h3JTGPWdaR6vjzhRc1W6r 9H0g== X-Gm-Message-State: AOAM530OgssT/sgRZ0L/sJQWoC9WjdqFI600fXP6ITY0qHilsF/3Skw0 OJl2sfXD+kY3D+ek+5XQeJZZGg== X-Google-Smtp-Source: ABdhPJwBzhqNz9CV9N0TSyJ7ZTBhPPhkncXxe8pHuZBIHnuiml3joPIijrND7KmjOEKulsBBdR6JNQ== X-Received: by 2002:a62:584:0:b029:32e:3b57:a1c6 with SMTP id 126-20020a6205840000b029032e3b57a1c6mr24589168pff.13.1627420620372; Tue, 27 Jul 2021 14:17:00 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id lk5sm3712997pjb.53.2021.07.27.14.16.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Jul 2021 14:16:58 -0700 (PDT) From: Kees Cook To: linux-hardening@vger.kernel.org Subject: [PATCH 58/64] powerpc: Split memset() to avoid multi-field overflow Date: Tue, 27 Jul 2021 13:58:49 -0700 Message-Id: <20210727205855.411487-59-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210727205855.411487-1-keescook@chromium.org> References: <20210727205855.411487-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=970; h=from:subject; bh=EqAYyR61If64Fj2IYKFg3jD8wd3YsI3R0DZAgupjjpE=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhAHON8m2NPAIDr9Q/N7SXLMGlDKKJPMFM5SUAuhto 7+vlDg+JAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYQBzjQAKCRCJcvTf3G3AJq+CEA Ca4qR9dFfukeDpwBivSWmdN4IXrLxxds4i79tyF2RZ1NetlF3zQFjf0dOJJ6NfqCZjinnNwHjnPaFi 9x4UwneOOuPj/4rf8k7cSpmM2UreUaAAA8VP/jFKg8vdwSBqelmbZjm8ng/qha6pxe9jqRvhE2RWKP qnrUYIUXlqe7N3FgL/8eOB67y/Un3Rfqu05z/doNPDcGWYTfIhpaZu3n+amLx44YduL03EwcMECH/l NDarqGZ78zXiW9XBAw38H8M3+unTerG5RPPulpFMa3XJ+hy0ln0RAD/CKthoOCrGmjVHEls689FYmk 47Xi02bCJdYfIgjqNVNZcc95yunNV29nLCcUCjqRA9qZpvkMrJWQANAATLtxAcI+/txMZUwS94jUFC otBX6K+dP0tshHI5p9QXMMjeOFJUZsvIm5n+eNLtqZADzbxH5992mbjlaJZzSynXuRU7LnKYFwp99u ACzU3xk+GoPHSQbfn0SU7L/H8QNlNuzxIiWmgfUKY2AXa7GfFeO+JPWTK/H/PczC9Or0vmzcwp+j06 gmLqgbtlJS5EyLTqxwdJDfRPF9CCi/hV2nu4l+oo6Pue1qSXQEmcxzqGPzn+HR7xkb5suJeevW+l7Z gDF++XCKaI8rWqYNDAdfLYj6eQLBZMJ8AM/75DxdC9t3gUyhjbCYaLueTqow== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kees Cook , linux-kbuild@vger.kernel.org, Greg Kroah-Hartman , linux-staging@lists.linux.dev, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, "Gustavo A. R. Silva" , linux-block@vger.kernel.org, clang-built-linux@googlegroups.com, Keith Packard , netdev@vger.kernel.org, Andrew Morton Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" In preparation for FORTIFY_SOURCE performing compile-time and run-time field bounds checking for memset(), avoid intentionally writing across neighboring fields. Instead of writing across a field boundary with memset(), move the call to just the array, and an explicit zeroing of the prior field. Signed-off-by: Kees Cook --- drivers/macintosh/smu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c index 94fb63a7b357..59ce431da7ef 100644 --- a/drivers/macintosh/smu.c +++ b/drivers/macintosh/smu.c @@ -848,7 +848,8 @@ int smu_queue_i2c(struct smu_i2c_cmd *cmd) cmd->read = cmd->info.devaddr & 0x01; switch(cmd->info.type) { case SMU_I2C_TRANSFER_SIMPLE: - memset(&cmd->info.sublen, 0, 4); + cmd->info.sublen = 0; + memset(&cmd->info.subaddr, 0, 3); break; case SMU_I2C_TRANSFER_COMBINED: cmd->info.devaddr &= 0xfe; -- 2.30.2