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=-7.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 75F75C433E0 for ; Mon, 4 Jan 2021 23:35:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 33E242253D for ; Mon, 4 Jan 2021 23:35:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727752AbhADXfd (ORCPT ); Mon, 4 Jan 2021 18:35:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727728AbhADXfc (ORCPT ); Mon, 4 Jan 2021 18:35:32 -0500 Received: from mail-qk1-x729.google.com (mail-qk1-x729.google.com [IPv6:2607:f8b0:4864:20::729]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 17FD9C061574 for ; Mon, 4 Jan 2021 15:34:52 -0800 (PST) Received: by mail-qk1-x729.google.com with SMTP id w79so25095898qkb.5 for ; Mon, 04 Jan 2021 15:34:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=X97uCJbbPtgQJjHkz/WOFp2vCTZb6uVs/5ruurICYkw=; b=ULBNjuLdpqWAZ2CmB4BzlMaaWd3wivYDUqf55ArdZL2bND/xzqNk6lG+FiPOQ3Cog7 8OWR2FOxNEmVvPShnwuw404/xjOdmYxarDoSwJ5MY1ZE15lsrphO2R+j9eTpWKU92j+x uh9AqedpJvOh9AcrGi4jrr1n4V6JVblSeFnH+jRy19l0aDor/DRyet4C7CjxNvL/awm8 nhvCtaZfZbX9RMKvN/6jVUCEJOoM+KPJb4MVDSDNj1A+m99pgBRygkdHC3Ymff2D1VFH r4yidWA26S7SANyIzmpf46wpvzaHPhDCTyZNRobFlFog5Tpt2v1Azok1+G7bLBrW1wPo 7+nA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=X97uCJbbPtgQJjHkz/WOFp2vCTZb6uVs/5ruurICYkw=; b=R8OVPCcgW2jxtyPr2o0dmSczjhf8E7YoTvMjWsWMKaIgsX67DxGwbTUpHItxt1p/c9 938eAEfNjU4+PcYPj+Z1y9zeCKd2zP/l2q87a834PtXjPIN2UMS74dGKytbLy/7vhSGt pCgqd3qSLu+xeIh3El20UKrujokeSSPyFmczmqMojbWJgCDwDA6tRVqSkYTVgNILs2i6 m+bBdr0piZubPihv3Ht244+955GgeIYUWsZINt+NYlf6lCJwOF1PG8Viy5xlMGc19Qin PlvizCvBfP9q6lFQrcLAZ2AG2oZLXC8hMDo23JzLkdRvfX2gTFey9EFARHT54yxgJJM5 wCjw== X-Gm-Message-State: AOAM5336Axe5n/U4RefYbP1FUXbFbaupbHrUA2kEXLRUpa6wUctnT1Kj NLICQ/4Pr5b7M8V8BXSguhw= X-Google-Smtp-Source: ABdhPJyTaA/4opdvLbW70FT+gxV6Bugiw2rykz38pBk31F7LC9wVf7OVz9/puIBVkWXDPMDPTLLe5A== X-Received: by 2002:a37:b4b:: with SMTP id 72mr74113122qkl.48.1609803291325; Mon, 04 Jan 2021 15:34:51 -0800 (PST) Received: from ubuntu-m3-large-x86 ([2604:1380:45f1:1d00::1]) by smtp.gmail.com with ESMTPSA id a22sm37751757qkl.121.2021.01.04.15.34.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Jan 2021 15:34:50 -0800 (PST) Date: Mon, 4 Jan 2021 16:34:49 -0700 From: Nathan Chancellor To: Andrew Morton Cc: Marco Elver , Arnd Bergmann , Kees Cook , Arnd Bergmann , Nick Desaulniers , George Popescu , Stephen Rothwell , LKML , clang-built-linux Subject: Re: [PATCH] ubsan: disable unsigned-integer-overflow sanitizer with clang Message-ID: <20210104233449.GA3382424@ubuntu-m3-large-x86> References: <20201230154749.746641-1-arnd@kernel.org> <20210104223336.GA2562866@ubuntu-m3-large-x86> <20210104153333.4b6c7ae49edc4182d53bd17f@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210104153333.4b6c7ae49edc4182d53bd17f@linux-foundation.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jan 04, 2021 at 03:33:33PM -0800, Andrew Morton wrote: > On Mon, 4 Jan 2021 15:33:36 -0700 Nathan Chancellor wrote: > > > > > +++ b/lib/Kconfig.ubsan > > > > @@ -122,6 +122,8 @@ config UBSAN_SIGNED_OVERFLOW > > > > > > > > config UBSAN_UNSIGNED_OVERFLOW > > > > bool "Perform checking for unsigned arithmetic overflow" > > > > + # clang hugely expands stack usage with -fsanitize=object-size > > > > > > This is the first time -fsanitize=object-size is mentioned. Typo? > > > > Copy and paste issue from CONFIG_UBSAN_OBJECT_SIZE > > This? Correct. > --- a/lib/Kconfig.ubsan~ubsan-disable-unsigned-integer-overflow-sanitizer-with-clang-fix > +++ a/lib/Kconfig.ubsan > @@ -122,7 +122,7 @@ config UBSAN_SIGNED_OVERFLOW > > config UBSAN_UNSIGNED_OVERFLOW > bool "Perform checking for unsigned arithmetic overflow" > - # clang hugely expands stack usage with -fsanitize=object-size > + # clang hugely expands stack usage with -fsanitize=unsigned-integer-overflow > depends on !CC_IS_CLANG > depends on $(cc-option,-fsanitize=unsigned-integer-overflow) > help > _ > Cheers, Nathan