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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 B35BEC2BA83 for ; Fri, 14 Feb 2020 16:28:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 80A9724694 for ; Fri, 14 Feb 2020 16:28:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581697709; bh=bsY2Ez2fjYKqL4INXHo6t0AnfkI2oIAHfv+cfuoZhC0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Cb1kd4YKLM9To59v0fhiEZs9BBcYd+HjmMhqAC2Wj7WFzpkO6qN8NRqcaZ2HZ9VrB v8Q9bTg6Es4SSpb7G4SOMJqHKwRSbFZ82bw0/A8cmu5QxyJ4nrLUsoJJ4uqJfaDpoy lio4mC9yoR2VcEqs+v4r7esfrEfLRTg+K0nK4hl0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406770AbgBNQ2W (ORCPT ); Fri, 14 Feb 2020 11:28:22 -0500 Received: from mail.kernel.org ([198.145.29.99]:37100 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406429AbgBNQ03 (ORCPT ); Fri, 14 Feb 2020 11:26:29 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id F16E224700; Fri, 14 Feb 2020 16:26:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581697588; bh=bsY2Ez2fjYKqL4INXHo6t0AnfkI2oIAHfv+cfuoZhC0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XAgauKL+e1SKXBO8bl9jB42ji5VcyEqBkoyKaiDU+0yUfisZPw5GxWjqmWKN+Ab/0 Fur2N7+enIxwLvyuPbnHgrpV9gSwI91cBHvwx7fmZ4LA14D2P//iBT5/LOmoWZZp1t J8sBgrAc1O8JPWg/oacma7bisKrdj+dCljFMFJjI= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Shubhrajyoti Datta , Michal Simek , Sasha Levin Subject: [PATCH AUTOSEL 4.4 099/100] microblaze: Prevent the overflow of the start Date: Fri, 14 Feb 2020 11:24:23 -0500 Message-Id: <20200214162425.21071-99-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214162425.21071-1-sashal@kernel.org> References: <20200214162425.21071-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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) -- 2.20.1