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=-19.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, 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,USER_AGENT_GIT autolearn=unavailable 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 02228C432BE for ; Thu, 26 Aug 2021 05:05:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DF9F761073 for ; Thu, 26 Aug 2021 05:05:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239766AbhHZFGH (ORCPT ); Thu, 26 Aug 2021 01:06:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238582AbhHZFFv (ORCPT ); Thu, 26 Aug 2021 01:05:51 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E2F70C0613CF for ; Wed, 25 Aug 2021 22:05:04 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id ot2-20020a17090b3b4200b0019127f8ed87so5258846pjb.1 for ; Wed, 25 Aug 2021 22:05:04 -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=wUGiyr3xsPMSx8OhiS6MBjOzSMfwTo6qvLGkcomqylk=; b=VuCkHMB1VQYEYHJkzyhB8xdSFi/41FiApesXgYjbGWkDN11tFyPl//j/KRsQQ7Sk/A 7qZISeIo1JmWTDeeGRc0c7xQ4F6rENPHOMaXiguIndpjAg3ZEpFiOdJHfAyhtE13VA9F uykbBIW1K7ZzV+Vhg08owYife8lXusB2Xyu0E= 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=wUGiyr3xsPMSx8OhiS6MBjOzSMfwTo6qvLGkcomqylk=; b=qJvdgsvDscSHoCCRjQnD1e6QTe2YUWwAb/8GO58umkCxKGOhr5BHHj7aUzzA6wWnUs 4/EJm3nHMyiObKgBoPX/umiHIXa+DiOgBkpBNf8FE0WyBBr4ckWMm2907Ovbpw5ZY2HR 25uc4Hx/0G5EVcUBxxH7ZnMKjvX59sLZY8fmsag/pUV7KH2FzstdO6yn8Awh2XOs2UoH cynZkCaKk4FPzslUAzHbWEX1rKMZYI5so+zUPvCv58LqW+Ewvdi3I3OzPMUIaZ9qkf7U gv2k5NKoLxaefn75AIoDBYa5unI3Q7s9UnUMd1uM8zwycNLBxXdRwzsf89FeFh1zeNR/ ej4Q== X-Gm-Message-State: AOAM532YuVYUd92ghLiptaRwn/9ZbghW5HqylexUydY4a3LsNYf2gOqQ H8KaenZN1xp6BJF9gtT7eKgQRg== X-Google-Smtp-Source: ABdhPJzBMb037AO91ukyk99+KaGE+DKvJN8SONVetu+5nq/tlTK7oez3Nf49eU5yT7wDHnTqacSycw== X-Received: by 2002:a17:902:c406:b0:12d:d0ff:4be with SMTP id k6-20020a170902c40600b0012dd0ff04bemr1932183plk.24.1629954304465; Wed, 25 Aug 2021 22:05:04 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id q9sm845318pfs.40.2021.08.25.22.05.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 25 Aug 2021 22:05:03 -0700 (PDT) From: Kees Cook To: linux-kernel@vger.kernel.org Cc: Kees Cook , "Gustavo A. R. Silva" , Arnd Bergmann , Masahiro Yamada , linux-kbuild@vger.kernel.org, Rasmus Villemoes , Keith Packard , Dan Williams , Daniel Vetter , clang-built-linux@googlegroups.com, linux-hardening@vger.kernel.org Subject: [PATCH v2 5/5] Makefile: Enable -Wzero-length-bounds Date: Wed, 25 Aug 2021 22:04:58 -0700 Message-Id: <20210826050458.1540622-6-keescook@chromium.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210826050458.1540622-1-keescook@chromium.org> References: <20210826050458.1540622-1-keescook@chromium.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=996; h=from:subject; bh=/SN5+6T3ztIGtswjzUhGWY/cmKXtgVAB5r1vX4FHhD8=; b=owEBbQKS/ZANAwAKAYly9N/cbcAmAcsmYgBhJyD54PEFBk7l4lz+prByvaAJlFG/Y2kCmVwrumJm JhcDUiyJAjMEAAEKAB0WIQSlw/aPIp3WD3I+bhOJcvTf3G3AJgUCYScg+QAKCRCJcvTf3G3AJsC+D/ 49jN/M53yldVraoYc8MXwX+Sk0xVJLw9Qx17Lnyh9r2OXIiB2JEcb93t1wS1OG16kMz8j/GBydQ+8t yIoXHSl8ZlclCCmSIWbUx4Mu253gXAui7dX128Y8CVlfbwqYJ5PyQL3nD8vk0yGXDji83kxE/dnHMU lzqNnMfnVFuKcZsyr9Z0NS9srdSXCB58id7DCCMvWwt74oK1+AgsAoZPEQSXT7x0sprmRw5J2Hc4Fg zKoLkK45i59aCgM2HM54A6v3IAs4bNjFEjJa5r+DpOTsGoi+8DtjNaGkbDIuDyq3sS+HnD7wqtKmSX rjczu/Nqle/MLQxSAph5jo/++DPU/A/ErXjAVcsj1rwJsecCmPHahvOOXkGGv+hepMnLvsgGRteZVp JcS8n23cR/Ho92OmB0kwH+/OEQZKZvvBL2uU//nLIkQYtDPkLC0xxUKNUefJCLbIw/4Hc5OzXfuDMB 603YyvtZg4HOMYIxgo7zLishMKI82OUdqZz88YhSLjz9peg+zryh9o9GBxiDg7+u1LgW+DkjcOeldv GSqhSiLqDG51d3OqPJ0MbEIJZxi97MQDw1muzzZMpLHRo/ohkZ985/qVH6xfSzaHputWj5zGC3X8mL j7O8Hs7TGRrWTI6yhMIMv4EfJ74b04ki//kwBq2+YYc8INF6bGgdW1dHGQsQ== X-Developer-Key: i=keescook@chromium.org; a=openpgp; fpr=A5C3F68F229DD60F723E6E138972F4DFDC6DC026 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org With all known internal zero-length accesses fixed, it is possible to enable -Wzero-length-bounds globally. Since this is included by default in -Warray-bounds, we just need to stop disabling it. Cc: "Gustavo A. R. Silva" Cc: Arnd Bergmann Cc: Masahiro Yamada Cc: linux-kbuild@vger.kernel.org Signed-off-by: Kees Cook --- Makefile | 1 - 1 file changed, 1 deletion(-) diff --git a/Makefile b/Makefile index 8e7e73a642e2..8e732e875e78 100644 --- a/Makefile +++ b/Makefile @@ -994,7 +994,6 @@ KBUILD_CFLAGS += -Wno-pointer-sign KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) # We'll want to enable this eventually, but it's not going away for 5.7 at least -KBUILD_CFLAGS += $(call cc-disable-warning, zero-length-bounds) KBUILD_CFLAGS += $(call cc-disable-warning, stringop-overflow) # Another good warning that we'll want to enable eventually -- 2.30.2