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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,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 81448C35257 for ; Fri, 2 Oct 2020 22:15:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 279B220738 for ; Fri, 2 Oct 2020 22:15:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="NspRsNBo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725747AbgJBWPc (ORCPT ); Fri, 2 Oct 2020 18:15:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725562AbgJBWPc (ORCPT ); Fri, 2 Oct 2020 18:15:32 -0400 Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A866C0613D0 for ; Fri, 2 Oct 2020 15:15:32 -0700 (PDT) Received: by mail-pg1-x541.google.com with SMTP id 34so1714654pgo.13 for ; Fri, 02 Oct 2020 15:15:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=V0SUsmWACvD3dNMBDG6SPv9xQ8I4+FrehwcPDr9x9nQ=; b=NspRsNBoQmAwlT7ORJjoYtbzCkS8Mem1PHd5ELyCp11qlcVrFG/e9NIs9mzirqBWRb sy2KeczTIFS+05DESF5CXcTDsPhucuYeI88jXAgsYuq8GCfBtZ3/bX0BRQ7aw9M6uYNy uz+algmJ3/4kBFBTVxv4JjL7VqNnzzFzjRQ0w= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=V0SUsmWACvD3dNMBDG6SPv9xQ8I4+FrehwcPDr9x9nQ=; b=RjIwrqGjJnWMbBNQ8EJuVQLl8HIHSYrBzXlE6ReRZc39l+ZlaVFpsPjyQ/F0j9ghSW RpFS4v9sJrBUjOcUM+RAkG/rE/kmIFUTQweF2t1+jkwJxZN1xs3mIYGfmAFSbk60qlao hLXHVwQeP9eYCbmucb6i1ZvdY4R0d3lfgTVkH3tZj2KhmXTo6DTS0zLG46G7WHFQ3G7f Sv6hIJItb6h5FeAgMdxfX8ztsD/S79/9tdEp9rC7MIf4MD97JrctEFt3sRSaQZOv6th6 3PYPuuJyEtq6Dh33Sg7XyHrbaw6CTnP9YEf4iNuVrxsqxYUQEoRQ1fZIgiXJ+efsD3rD qY4A== X-Gm-Message-State: AOAM530hKBiD/YnyCTFBn9T3uBR9co7Zo6qDXzd0/j0hbnNpuYkizWLx BMzB8umlbXhUKXFfp9ykdnPA0w== X-Google-Smtp-Source: ABdhPJwUyVVoH5EXUD3PrxRHDmHm6dp6faop7SkvnztMQv9qaPMVwZugN89ctYIKMniZcrQvA9CcJQ== X-Received: by 2002:a63:794e:: with SMTP id u75mr4097073pgc.233.1601676931560; Fri, 02 Oct 2020 15:15:31 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id k4sm3349568pfp.189.2020.10.02.15.15.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Oct 2020 15:15:29 -0700 (PDT) From: Kees Cook To: Andrew Morton Cc: Kees Cook , Linus Torvalds , Ard Biesheuvel , Arnd Bergmann , Masahiro Yamada , Michal Marek , Nathan Chancellor , Nick Desaulniers , Marco Elver , Randy Dunlap , Dmitry Vyukov , George Popescu , Herbert Xu , Peter Oberparleiter , Andrey Ryabinin , clang-built-linux@googlegroups.com, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] ubsan: Disable object-size sanitizer under GCC Date: Fri, 2 Oct 2020 15:15:25 -0700 Message-Id: <20201002221527.177500-3-keescook@chromium.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201002221527.177500-1-keescook@chromium.org> References: <20201002221527.177500-1-keescook@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org GCC's -fsanitize=object-size (as part of CONFIG_UBSAN_MISC) greatly increases stack utilization. Do not allow this under GCC. Suggested-by: Linus Torvalds Link: https://lore.kernel.org/lkml/CAHk-=wjPasyJrDuwDnpHJS2TuQfExwe=px-SzLeN8GFMAQJPmQ@mail.gmail.com/ Signed-off-by: Kees Cook --- lib/Kconfig.ubsan | 3 +++ 1 file changed, 3 insertions(+) diff --git a/lib/Kconfig.ubsan b/lib/Kconfig.ubsan index c0b801871e0b..aeb2cdea0b94 100644 --- a/lib/Kconfig.ubsan +++ b/lib/Kconfig.ubsan @@ -104,6 +104,9 @@ 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 -- 2.25.1