From patchwork Tue Mar 7 16:58:12 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 13164307 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 BE8EDC678D5 for ; Tue, 7 Mar 2023 17:49:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232221AbjCGRtB (ORCPT ); Tue, 7 Mar 2023 12:49:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36350 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232223AbjCGRsh (ORCPT ); Tue, 7 Mar 2023 12:48:37 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A87592BEB; Tue, 7 Mar 2023 09:43:28 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 95029B819C4; Tue, 7 Mar 2023 17:43:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1ABCC433EF; Tue, 7 Mar 2023 17:43:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678211001; bh=+9OuRYwPI54o/Fm7g7hAoBFrQ8pYFyaSyAT3RvzsrqY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g1tzAEK3yBuYiRT1ggY0dVp6engIpJE0j4kPNd11btCSlTpnFrNsI8/g80pCZGSOb GHWQWydnli9dHyFI09d00aQxDR9Bh+tYrkpgoq083QD8KF+JD1EpZyX534UqynsRXj Ft/+i5wTOELnJtBR0iQePf5v2vltrYcngj5HayX8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Krzysztof Kozlowski , Liam Girdwood , Mark Brown , linux-samsung-soc@vger.kernel.org, Kees Cook , Sasha Levin Subject: [PATCH 6.2 0720/1001] regulator: s5m8767: Bounds check id indexing into arrays Date: Tue, 7 Mar 2023 17:58:12 +0100 Message-Id: <20230307170052.923330055@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307170022.094103862@linuxfoundation.org> References: <20230307170022.094103862@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org From: Kees Cook [ Upstream commit e314e15a0b58f9d051c00b25951073bcdae61953 ] The compiler has no way to know if "id" is within the array bounds of the regulators array. Add a check for this and a build-time check that the regulators and reg_voltage_map arrays are sized the same. Seen with GCC 13: ../drivers/regulator/s5m8767.c: In function 's5m8767_pmic_probe': ../drivers/regulator/s5m8767.c:936:35: warning: array subscript [0, 36] is outside array bounds of 'struct regulator_desc[37]' [-Warray-bounds=] 936 | regulators[id].vsel_reg = | ~~~~~~~~~~^~~~ Cc: Krzysztof Kozlowski Cc: Liam Girdwood Cc: Mark Brown Cc: linux-samsung-soc@vger.kernel.org Signed-off-by: Kees Cook Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20230128005358.never.313-kees@kernel.org Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/regulator/s5m8767.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c index 35269f9982105..754c6fcc6e642 100644 --- a/drivers/regulator/s5m8767.c +++ b/drivers/regulator/s5m8767.c @@ -923,10 +923,14 @@ static int s5m8767_pmic_probe(struct platform_device *pdev) for (i = 0; i < pdata->num_regulators; i++) { const struct sec_voltage_desc *desc; - int id = pdata->regulators[i].id; + unsigned int id = pdata->regulators[i].id; int enable_reg, enable_val; struct regulator_dev *rdev; + BUILD_BUG_ON(ARRAY_SIZE(regulators) != ARRAY_SIZE(reg_voltage_map)); + if (WARN_ON_ONCE(id >= ARRAY_SIZE(regulators))) + continue; + desc = reg_voltage_map[id]; if (desc) { regulators[id].n_voltages =