From patchwork Tue Apr 26 08:21:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 12826657 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 3FD66C433EF for ; Tue, 26 Apr 2022 08:34:28 +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:References:In-Reply-To: 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: List-Owner; bh=mSlk+wa9OnInUJksuRpmx2OvLeOXlb67ySyzkCSMuPo=; b=Id7w1hkhKN6O1y LZKTBErLniNHmuxGx1g+OVN46DEXEIcuYiyKUcm3EDlkI1wKtNQaLmcXtuAgWqbZz2I3twSqUS/ff lRYJjfVBtJf+B8AjhLX9wrY5b8I/u+xLy30QJlugqLAfDEO/9BbVgpLozoWDTiPe6VD2vg3OYM/Ez xVV2i+kDZc4ct1h1yfrNNTdlewTeYcJApl5ZqP0DDrxCxARJk2NpuNsV+M/Dt8jdBx4F7RQ5+nbSm opNciIbh6Q3cOFFTNmW4VrLHEjt4/3FI2I55syOFv7ZvwYZaipiIO1+JoFCxGNjEHPXSSWTlAx8NJ m1EjepXwP+ry0jJbgr/w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1njGdP-00DKVh-TC; Tue, 26 Apr 2022 08:33:24 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1njGdC-00DKQL-Oj for linux-arm-kernel@lists.infradead.org; Tue, 26 Apr 2022 08:33:12 +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 17399618A2; Tue, 26 Apr 2022 08:33:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0915FC385A4; Tue, 26 Apr 2022 08:33:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650961989; bh=y4FzcMqIYjP6yJMMswEni40ksnSonHHl5KEbQHYCCgw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vAAZTBAix+J9y0VTxlIVpI760LLcyd6siEyLGn6Rsk1l5QbDxMe23SGgPzPGsLnkS 6MD9FoOn5RsGHReJY8Mu0pwh1u8z4IH88P5APGBC7/wrPW03j+6m5CWd/jOIHG9W6r iX4dHtUu1PdX8ZV4nxALA0BBHzaHU3npUxG1dEUk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Liviu Dudau , Sudeep Holla , Lorenzo Pieralisi , Russell King , linux-arm-kernel@lists.infradead.org, Kees Cook , Sasha Levin Subject: [PATCH 5.10 34/86] ARM: vexpress/spc: Avoid negative array index when !SMP Date: Tue, 26 Apr 2022 10:21:02 +0200 Message-Id: <20220426081742.190193542@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220426081741.202366502@linuxfoundation.org> References: <20220426081741.202366502@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220426_013310_883636_761D58A9 X-CRM114-Status: GOOD ( 14.88 ) 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: , 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))