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 C176AC433F5 for ; Tue, 19 Apr 2022 18:16:47 +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-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=/ntcPKhNADij+7GTcIEx0ewRoD+FHJgQ4FDNvz+m2VI=; b=hMMLz9EbLtoNf6 m+kDyxSfFcG5+v/A3xLmoumOLiUSV77SmGQacV6pDC22C8nlKMXXFqC3MOBfY9B93BUMdZUK5cpl6 i6V5ZuBnfeqQshdqLmGOUxgDWIpxq4VZCbgiA04LeRjFOlp6BmJBWDvTA/8NXl3D4LNHgn1IehFpM rbCIP5U2Qkeu0OE7v0oE2a5+6MI7Ef3yHBCcdXoEAhUVOo3ca7tPyIN8YwR20Cb//yzx1W9ppRE2s gSM4Qgrn9DDMAizYciJ4WMwbWzYMt+D4tJ1hxwjE/x6U3Bgk9hAZS0LCMfm9khI/zYheU/6SoSc2Y inuJxQvNp5Ffz5apvf5A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ngsNy-005ZM2-ER; Tue, 19 Apr 2022 18:15:34 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ngsLG-005Xet-6D for linux-arm-kernel@lists.infradead.org; Tue, 19 Apr 2022 18:12:49 +0000 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 dfw.source.kernel.org (Postfix) with ESMTPS id 82C6A60DBB; Tue, 19 Apr 2022 18:12:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50AACC385A5; Tue, 19 Apr 2022 18:12:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1650391965; bh=y4FzcMqIYjP6yJMMswEni40ksnSonHHl5KEbQHYCCgw=; h=From:To:Cc:Subject:Date:From; b=hekEBNltUCmnaQrNDUB/B9gJKotJilZJcLRMyzQMPgmbgtS/tUxxMgg76IHTWHTaE 4oEAtJIh2NZq7/uz3fgdqxrzaKSbwd9LJfujEXR4OuIqwao2IQ5q+wIFGHcQ+Yf38i E3hJn+TJsOJ6+dtKJb+wGYIyCZ51pmL1t2qR3IhkA/a3ceVVS2+JzKm6UhYBCjaXBt VXrzaryDOnohpEqEiXuOd2yCH3uK/E0TnRuOx+7sLSI6c+Gol2iM2EiCw+9EQAL8/G AHbPAW6ZUSl1ZAV1xdB8XlFkWC7/tBHWdMxKOVKWo8DLJ130xPMWfw4w9AjGV89x9M Agk++BthGEMlw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kees Cook , Liviu Dudau , Sudeep Holla , Lorenzo Pieralisi , Russell King , linux-arm-kernel@lists.infradead.org, Sasha Levin Subject: [PATCH AUTOSEL 5.15 01/27] ARM: vexpress/spc: Avoid negative array index when !SMP Date: Tue, 19 Apr 2022 14:12:16 -0400 Message-Id: <20220419181242.485308-1-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220419_111246_317437_905103E9 X-CRM114-Status: GOOD ( 13.61 ) 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: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Kees Cook [ Upstream commit b3f1dd52c991d79118f35e6d1bf4d7cb09882e38 ] When building multi_v7_defconfig+CONFIG_SMP=n, -Warray-bounds exposes a couple negative array index accesses: arch/arm/mach-vexpress/spc.c: In function 've_spc_clk_init': arch/arm/mach-vexpress/spc.c:583:21: warning: array subscript -1 is below array bounds of 'bool[2]' {aka '_Bool[2]'} [-Warray-bounds] 583 | if (init_opp_table[cluster]) | ~~~~~~~~~~~~~~^~~~~~~~~ arch/arm/mach-vexpress/spc.c:556:7: note: while referencing 'init_opp_table' 556 | bool init_opp_table[MAX_CLUSTERS] = { false }; | ^~~~~~~~~~~~~~ arch/arm/mach-vexpress/spc.c:592:18: warning: array subscript -1 is below array bounds of 'bool[2]' {aka '_Bool[2]'} [-Warray-bounds] 592 | init_opp_table[cluster] = true; | ~~~~~~~~~~~~~~^~~~~~~~~ arch/arm/mach-vexpress/spc.c:556:7: note: while referencing 'init_opp_table' 556 | bool init_opp_table[MAX_CLUSTERS] = { false }; | ^~~~~~~~~~~~~~ Skip this logic when built !SMP. Link: https://lore.kernel.org/r/20220331190443.851661-1-keescook@chromium.org Cc: Liviu Dudau Cc: Sudeep Holla Cc: Lorenzo Pieralisi Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org Acked-by: Liviu Dudau Signed-off-by: Kees Cook Signed-off-by: Sudeep Holla Signed-off-by: Sasha Levin --- arch/arm/mach-vexpress/spc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-vexpress/spc.c b/arch/arm/mach-vexpress/spc.c index 1da11bdb1dfb..1c6500c4e6a1 100644 --- a/arch/arm/mach-vexpress/spc.c +++ b/arch/arm/mach-vexpress/spc.c @@ -580,7 +580,7 @@ static int __init ve_spc_clk_init(void) } cluster = topology_physical_package_id(cpu_dev->id); - if (init_opp_table[cluster]) + if (cluster < 0 || init_opp_table[cluster]) continue; if (ve_init_opp_table(cpu_dev)) -- 2.35.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel