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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B1216EB64DC for ; Thu, 22 Jun 2023 17:20:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230471AbjFVRUu (ORCPT ); Thu, 22 Jun 2023 13:20:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53166 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230425AbjFVRUr (ORCPT ); Thu, 22 Jun 2023 13:20:47 -0400 Received: from gnuweeb.org (gnuweeb.org [51.81.211.47]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0B5B32122; Thu, 22 Jun 2023 10:20:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gnuweeb.org; s=default; t=1687454443; bh=BRDGujV5bASaXtU4sheMv8CYwhxietJD+x2yxoDCxrU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=pm4EJdOucz/QFIs9qx8AhSqVSkcNTrceYPjxeRkf5mWBx/zlgPp/7qB4g2jIyAL2f 5erRWGGOrF9hmU60mA7EHt/hTsxOczh8vmbwhR4WQuyNAWBQULOKk4IEOfhvW9qfyL BnIqudSH/5s/2Yg23Dv7GHn0nvPb7l6u30yU+UrC4u7PhdsG1XPimEDQWcWAMlTQ2m lzL0anzjOmJyoqRhyB4nGRVS+zMXBlAmngtKnLUEo2sYbb1G63met3FH4CWKZWf2JV aqeI79+C2po8v+CsTeUCy0AwPMLv7DLF36WmsqsuK+6PdBaEcD4VhGdYhuXIg/Gru7 AEr5/1J/Mo7gw== Received: from integral2.. (unknown [68.183.184.174]) by gnuweeb.org (Postfix) with ESMTPSA id 77D11249C7A; Fri, 23 Jun 2023 00:20:40 +0700 (WIB) From: Ammar Faizi To: Jens Axboe Cc: Alviro Iskandar Setiawan , Guillem Jover , Jeff Moyer , Stefan Hajnoczi , Michael William Jonathan , Matthew Patrick , io-uring Mailing List , Linux Kernel Mailing List , GNU/Weeb Mailing List Subject: [RFC PATCH liburing v1 2/3] configure: Introduce '--use-libc' option Date: Fri, 23 Jun 2023 00:20:28 +0700 Message-Id: <20230622172029.726710-3-ammarfaizi2@gnuweeb.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230622172029.726710-1-ammarfaizi2@gnuweeb.org> References: <20230622172029.726710-1-ammarfaizi2@gnuweeb.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Currently, when compiling liburing on x86, x86-64, and aarch64 architectures, the resulting binary lacks the linkage with the standard C library (libc). To address the concerns raised by Linux distribution package maintainers regarding security, it is necessary to enable the linkage of libc to liburing. Especially right now, when the security of io_uring is being scrutinized. By incorporating the '--use-libc' option, developers can now enhance the overall hardening of liburing by utilizing compiler features such as the stack protector and address sanitizer. Link: https://security.googleblog.com/2023/06/learnings-from-kctf-vrps-42-linux.html Link: https://lore.kernel.org/io-uring/20230621100447.GD2667602@fedora Link: https://lore.kernel.org/io-uring/ZJLkXC7QffsoCnpu@thunder.hadrons.org Cc: Stefan Hajnoczi Cc: Guillem Jover Co-authored-by: Alviro Iskandar Setiawan Signed-off-by: Alviro Iskandar Setiawan Signed-off-by: Ammar Faizi --- configure | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/configure b/configure index a16ffca83d678364..46afb7285a1ea8d0 100755 --- a/configure +++ b/configure @@ -26,6 +26,8 @@ for opt do ;; --cxx=*) cxx="$optarg" ;; + --use-libc) use_libc=yes + ;; *) echo "ERROR: unknown option $opt" echo "Try '$0 --help' for more information" @@ -73,6 +75,7 @@ Options: [defaults in brackets after descriptions] --datadir=PATH install shared data in PATH [$datadir] --cc=CMD use CMD as the C compiler --cxx=CMD use CMD as the C++ compiler + --use-libc use libc for liburing (useful for hardening) EOF exit 0 fi @@ -382,10 +385,13 @@ fi print_config "NVMe uring command support" "$nvme_uring_cmd" ############################################################################# -# -# Currently, CONFIG_NOLIBC is only enabled on x86-64, x86 (32-bit) and aarch64. -# -cat > $TMPC << EOF +liburing_nolibc="no" +if test "$use_libc" != "yes"; then + + # + # Currently, CONFIG_NOLIBC only supports x86-64, x86 (32-bit) and aarch64. + # + cat > $TMPC << EOF int main(void){ #if defined(__x86_64__) || defined(__i386__) || defined(__aarch64__) return 0; @@ -394,10 +400,13 @@ int main(void){ #endif } EOF -if compile_prog "" "" "nolibc support"; then - liburing_nolibc="yes" + + if compile_prog "" "" "nolibc"; then + liburing_nolibc="yes" + fi fi -print_config "nolibc support" "$liburing_nolibc"; + +print_config "nolibc" "$liburing_nolibc"; ############################################################################# #################################################### -- Ammar Faizi