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=-5.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS, T_DKIMWL_WL_HIGH,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 2A832C04AAD for ; Mon, 6 May 2019 14:48:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F1B4B20C01 for ; Mon, 6 May 2019 14:48:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557154116; bh=p6RVOtZfYnh8+vutVexuQSUaNn8ATx66Mk/NyeUR5gk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=eT0tkD9Icm3ji+kdIbAEvMz94ZMR5q4vP+jWxzPm1hKdxO6NiY39KgGXdlZy0G+iv /FzqJSwN7EHVHM1DbgQANMRczRP/qiDRQflsYbWZ+sEdwWepprpIrzArU17EIsc+na Vas0QxBtE/XMEQN8DJf14WO/V+axBgOwl1ct3deY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729487AbfEFOse (ORCPT ); Mon, 6 May 2019 10:48:34 -0400 Received: from mail.kernel.org ([198.145.29.99]:49000 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729178AbfEFOsc (ORCPT ); Mon, 6 May 2019 10:48:32 -0400 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 68A9A20C01; Mon, 6 May 2019 14:48:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557154111; bh=p6RVOtZfYnh8+vutVexuQSUaNn8ATx66Mk/NyeUR5gk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GlrGXug/rXVYeU5FIYFpCbloHD7aZQtwrJce2SoMP5Y+qGtJNQvqFGQNyVbwh5ugo 0zPNoRtMGPO1874BpRqRN1pcRTQ46UZmD97hGE0S5ZUA84bKyQRkLfP2IImmcPXdFS El06vZ7vMAWrWQykBVZdU7jKuSGA4iper7aHL3Bw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Andrey Ryabinin , Dmitry Vyukov , Alexander Potapenko , Andrey Konovalov , Andrew Morton , Linus Torvalds Subject: [PATCH 4.9 09/62] kasan: turn on -fsanitize-address-use-after-scope Date: Mon, 6 May 2019 16:32:40 +0200 Message-Id: <20190506143051.888762392@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190506143051.102535767@linuxfoundation.org> References: <20190506143051.102535767@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Andrey Ryabinin commit c5caf21ab0cf884ef15b25af234f620e4a233139 upstream. In the upcoming gcc7 release, the -fsanitize=kernel-address option at first implied new -fsanitize-address-use-after-scope option. This would cause link errors on older kernels because they don't have two new functions required for use-after-scope support. Therefore, gcc7 changed default to -fno-sanitize-address-use-after-scope. Now the kernel has everything required for that feature since commit 828347f8f9a5 ("kasan: support use-after-scope detection"). So, to make it work, we just have to enable use-after-scope in CFLAGS. Link: http://lkml.kernel.org/r/1481207977-28654-1-git-send-email-aryabinin@virtuozzo.com Signed-off-by: Andrey Ryabinin Acked-by: Dmitry Vyukov Cc: Alexander Potapenko Cc: Andrey Konovalov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Andrey Konovalov Signed-off-by: Greg Kroah-Hartman --- scripts/Makefile.kasan | 2 ++ 1 file changed, 2 insertions(+) --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -29,6 +29,8 @@ else endif endif +CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) + CFLAGS_KASAN_NOSANITIZE := -fno-builtin endif