From patchwork Fri Feb 21 07:42:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 230864 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBA26C35642 for ; Fri, 21 Feb 2020 08:24:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B7AC6246A1 for ; Fri, 21 Feb 2020 08:24:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582273467; bh=bsY2Ez2fjYKqL4INXHo6t0AnfkI2oIAHfv+cfuoZhC0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mq3YOTdn08QJypfLsnCFVyfGEHXf8PWElKzWABLI/rSws49jYS7c5da4zDSVMM3vu k9/M2K0JLYdRWVwAj/Pljixkpu3xhHT4U2wdJKQfkXENWncN5hFNRmQW/PnrhcEFwK 5AqxcuK4qjN3N+xQt6wAJCppBhJa44pBVrip2UWs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388658AbgBUIY1 (ORCPT ); Fri, 21 Feb 2020 03:24:27 -0500 Received: from mail.kernel.org ([198.145.29.99]:36912 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729774AbgBUIY0 (ORCPT ); Fri, 21 Feb 2020 03:24:26 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D3A58206ED; Fri, 21 Feb 2020 08:24:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582273466; bh=bsY2Ez2fjYKqL4INXHo6t0AnfkI2oIAHfv+cfuoZhC0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tsAdHtfE2jGGFgkhE5r7lnafBmoOuDF+yF3PjUXK0KB5yUYlTBIwZBSLozQMp1Zcf BFp6QDWKwDkMkN2ln/miU7JgtqpR0c1qoaD4KGVSpvTyQl1f1YwXIBdCCdZfaWXhLq 1Qrb30768XvveXkUvbvYfrEyRxAra+haB/Pebin4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Shubhrajyoti Datta , Michal Simek , Sasha Levin Subject: [PATCH 4.19 182/191] microblaze: Prevent the overflow of the start Date: Fri, 21 Feb 2020 08:42:35 +0100 Message-Id: <20200221072312.635260580@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200221072250.732482588@linuxfoundation.org> References: <20200221072250.732482588@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Shubhrajyoti Datta [ Upstream commit 061d2c1d593076424c910cb1b64ecdb5c9a6923f ] In case the start + cache size is more than the max int the start overflows. Prevent the same. Signed-off-by: Shubhrajyoti Datta Signed-off-by: Michal Simek Signed-off-by: Sasha Levin --- arch/microblaze/kernel/cpu/cache.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/microblaze/kernel/cpu/cache.c b/arch/microblaze/kernel/cpu/cache.c index 0bde47e4fa694..dcba53803fa5f 100644 --- a/arch/microblaze/kernel/cpu/cache.c +++ b/arch/microblaze/kernel/cpu/cache.c @@ -92,7 +92,8 @@ static inline void __disable_dcache_nomsr(void) #define CACHE_LOOP_LIMITS(start, end, cache_line_length, cache_size) \ do { \ int align = ~(cache_line_length - 1); \ - end = min(start + cache_size, end); \ + if (start < UINT_MAX - cache_size) \ + end = min(start + cache_size, end); \ start &= align; \ } while (0)