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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 71CBDC4361B for ; Wed, 16 Dec 2020 04:47:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3A14223339 for ; Wed, 16 Dec 2020 04:47:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725974AbgLPErJ (ORCPT ); Tue, 15 Dec 2020 23:47:09 -0500 Received: from mail.kernel.org ([198.145.29.99]:52254 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725889AbgLPErJ (ORCPT ); Tue, 15 Dec 2020 23:47:09 -0500 Date: Tue, 15 Dec 2020 20:46:28 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1608093989; bh=YwrmKa55pUjVOqVV/eSJX4MnmwW875Yj+ZNR6M+Y+ss=; h=From:To:Subject:In-Reply-To:From; b=jmYGamBjIzNNdCcx/RMbWQm65pRlK52d5tMEHF0aapG5g3/b+X/CuT8kHuhomsRdC vRbkPxhRtUc/6dG7yvFvsS5g4xQmmb5/5NvWoXjXLT2SiZqAccJFpJdQ+SjzuF0A8v kRYehGuJutFOTo3QwHkvTFtHMWA09D2womdsY7Qk= From: Andrew Morton To: akpm@linux-foundation.org, ardb@kernel.org, arnd@arndb.de, aryabinin@virtuozzo.com, dvyukov@google.com, elver@google.com, georgepope@android.com, herbert@gondor.apana.org.au, keescook@chromium.org, linux-mm@kvack.org, masahiroy@kernel.org, michal.lkml@markovi.net, mm-commits@vger.kernel.org, natechancellor@gmail.com, ndesaulniers@google.com, oberpar@linux.ibm.com, rdunlap@infradead.org, torvalds@linux-foundation.org Subject: [patch 76/95] ubsan: disable object-size sanitizer under GCC Message-ID: <20201216044628.M8eziqBtu%akpm@linux-foundation.org> In-Reply-To: <20201215204156.f05ec694b907845bcfab5c44@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: Kees Cook Subject: ubsan: disable object-size sanitizer under GCC GCC's -fsanitize=object-size (as part of CONFIG_UBSAN_MISC) greatly increases stack utilization. Do not allow this under GCC. Link: https://lkml.kernel.org/r/20201203004437.389959-4-keescook@chromium.org Link: https://lore.kernel.org/lkml/CAHk-=wjPasyJrDuwDnpHJS2TuQfExwe=px-SzLeN8GFMAQJPmQ@mail.gmail.com/ Signed-off-by: Kees Cook Reviewed-by: Nathan Chancellor Suggested-by: Linus Torvalds Cc: Andrey Ryabinin Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: Dmitry Vyukov Cc: George Popescu Cc: Herbert Xu Cc: Marco Elver Cc: Masahiro Yamada Cc: Michal Marek Cc: Nick Desaulniers Cc: Peter Oberparleiter Cc: Randy Dunlap Signed-off-by: Andrew Morton --- lib/Kconfig.ubsan | 3 +++ 1 file changed, 3 insertions(+) --- a/lib/Kconfig.ubsan~ubsan-disable-object-size-sanitizer-under-gcc +++ a/lib/Kconfig.ubsan @@ -113,6 +113,9 @@ config UBSAN_UNSIGNED_OVERFLOW config UBSAN_OBJECT_SIZE def_bool UBSAN_MISC + # gcc hugely expands stack usage with -fsanitize=object-size + # https://lore.kernel.org/lkml/CAHk-=wjPasyJrDuwDnpHJS2TuQfExwe=px-SzLeN8GFMAQJPmQ@mail.gmail.com/ + depends on !CC_IS_GCC depends on $(cc-option,-fsanitize=object-size) config UBSAN_BOOL _