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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26058CE79D2 for ; Wed, 20 Sep 2023 12:16:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235536AbjITMQX (ORCPT ); Wed, 20 Sep 2023 08:16:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235583AbjITMQK (ORCPT ); Wed, 20 Sep 2023 08:16:10 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3DCB12B for ; Wed, 20 Sep 2023 05:16:01 -0700 (PDT) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73313C433CA; Wed, 20 Sep 2023 12:16:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1695212160; bh=f+3LCWhbFSwLAxaVjGWfzdm/UjLfGK3nEMYEwAU2dhQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ntZ8NiOvVB6jw9BTFupKtjQbHfSvxMOZu6U4OLCfeHTygPcnYDsmwnQ6QTLVyYwsx VIUvfCEyZvtXleRx0yi6xyM1FQnIMR56N85h3ikw6cxHl64KhH6sh1vIatEMbOEWtW 28AnIl2mwGU6qFWggHE1sVcZblid1+IX0utf5SkE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, kernel test robot , "Gustavo A. R. Silva" , Ard Biesheuvel , Tony Lindgren Subject: [PATCH 4.19 174/273] ARM: OMAP2+: Fix -Warray-bounds warning in _pwrdm_state_switch() Date: Wed, 20 Sep 2023 13:30:14 +0200 Message-ID: <20230920112851.894197817@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230920112846.440597133@linuxfoundation.org> References: <20230920112846.440597133@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Gustavo A. R. Silva commit 847fb80cc01a54bc827b02547bb8743bdb59ddab upstream. If function pwrdm_read_prev_pwrst() returns -EINVAL, we will end up accessing array pwrdm->state_counter through negative index -22. This is wrong and the compiler is legitimately warning us about this potential problem. Fix this by sanity checking the value stored in variable _prev_ before accessing array pwrdm->state_counter. Address the following -Warray-bounds warning: arch/arm/mach-omap2/powerdomain.c:178:45: warning: array subscript -22 is below array bounds of 'unsigned int[4]' [-Warray-bounds] Link: https://github.com/KSPP/linux/issues/307 Fixes: ba20bb126940 ("OMAP: PM counter infrastructure.") Cc: stable@vger.kernel.org Reported-by: kernel test robot Link: https://lore.kernel.org/lkml/20230607050639.LzbPn%25lkp@intel.com/ Signed-off-by: Gustavo A. R. Silva Message-ID: Acked-by: Ard Biesheuvel Signed-off-by: Tony Lindgren Signed-off-by: Greg Kroah-Hartman --- arch/arm/mach-omap2/powerdomain.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -177,7 +177,7 @@ static int _pwrdm_state_switch(struct po break; case PWRDM_STATE_PREV: prev = pwrdm_read_prev_pwrst(pwrdm); - if (pwrdm->state != prev) + if (prev >= 0 && pwrdm->state != prev) pwrdm->state_counter[prev]++; if (prev == PWRDM_POWER_RET) _update_logic_membank_counters(pwrdm);