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 CB41DC4332F for ; Mon, 17 Jan 2022 17:05:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242492AbiAQREe (ORCPT ); Mon, 17 Jan 2022 12:04:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241859AbiAQRCi (ORCPT ); Mon, 17 Jan 2022 12:02:38 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE271C0613A0; Mon, 17 Jan 2022 09:02:07 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 9F093611C0; Mon, 17 Jan 2022 17:02:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 358C2C36AE3; Mon, 17 Jan 2022 17:02:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642438927; bh=Ht43UxNFhdmKPNTqhSR/k8BwiUdZV1+y0lRQ40YRnCE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QbHjZ2wCfBHmsSG17snbTTu7l9UzJIW91PRVl1fJPNooeARPLHPMb+2H6AIYHE0Ko 6culZs94USRHLk6anvFlmENQ//I9KKSuUUjR2TDohmK/Yrb1rE8SwnrfvFyDGWGzn3 lIjyfS5/LAcagGo1jSPYOt50Wh7mQx8FOe/gGEap8rtah4Yzu1mT8FcvSXJeDscNSt AvAsy5x8WdpTaHCpSdIvlPDdrstqGqZWjTCP8peOnwGE7/ffkzXtB8lwLr6ec6T8Yj Xsawc6Rt9Fokt7s8hpo/rdarbQN29FMBrUwdx/+wrtt+9KUwZHbd/iowfm3PVYTJFC g/vbbbbPM/9TA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Stephan Gerhold , Georgi Djakov , Sasha Levin , agross@kernel.org, bjorn.andersson@linaro.org, linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH AUTOSEL 5.15 18/44] interconnect: qcom: rpm: Prevent integer overflow in rate Date: Mon, 17 Jan 2022 12:01:01 -0500 Message-Id: <20220117170127.1471115-18-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220117170127.1471115-1-sashal@kernel.org> References: <20220117170127.1471115-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stephan Gerhold [ Upstream commit a7d9436a6c85fcb8843c910fd323dcd7f839bf63 ] Using icc-rpm on ARM32 currently results in clk_set_rate() errors during boot, e.g. "bus clk_set_rate error: -22". This is very similar to commit 7381e27b1e56 ("interconnect: qcom: msm8974: Prevent integer overflow in rate") where the u64 is converted to a signed long during clock rate rounding, resulting in an overflow on 32-bit platforms. Let's fix it similarly by making sure that the rate does not exceed LONG_MAX. Such high clock rates will surely result in the maximum frequency of the bus anyway. Signed-off-by: Stephan Gerhold Link: https://lore.kernel.org/r/20211206114542.45325-1-stephan@gerhold.net Signed-off-by: Georgi Djakov Signed-off-by: Sasha Levin --- drivers/interconnect/qcom/icc-rpm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/interconnect/qcom/icc-rpm.c b/drivers/interconnect/qcom/icc-rpm.c index 54de49ca7808a..ddf1805ded0c0 100644 --- a/drivers/interconnect/qcom/icc-rpm.c +++ b/drivers/interconnect/qcom/icc-rpm.c @@ -68,6 +68,7 @@ static int qcom_icc_set(struct icc_node *src, struct icc_node *dst) rate = max(sum_bw, max_peak_bw); do_div(rate, qn->buswidth); + rate = min_t(u64, rate, LONG_MAX); if (qn->rate == rate) return 0; -- 2.34.1