From patchwork Fri May 26 06:30:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 99305 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp266749vqr; Thu, 25 May 2023 23:36:48 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4LF+7eAFGny8gyagKOZsbCwz67DbjL3G6Go7pe7w8+O8IK2nQMNgXZ8oI2BBReWNdUlcut X-Received: by 2002:a17:90a:c4:b0:253:4ae0:4256 with SMTP id v4-20020a17090a00c400b002534ae04256mr1484356pjd.2.1685083007794; Thu, 25 May 2023 23:36:47 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1685083007; cv=none; d=google.com; s=arc-20160816; b=x+Q8l17lQttLFcFrlRgMcXJSzdqXj7GZxGCeSz6y7uajP4tGUEtosv+uGdqb050bgt 1EzUUnMdo5SWnJ0ExWouin6cL+nwTIpy0DDkEHyeGb1lHsNodpbjcmOmCaIZRD3ouXLT CSZQEPWrO2ftMrMLClRZBIA4ztAJxwgF6NiAY6/Q2J8kwj2cUA6G4RA0obZwDXXwvQbN qH9CwX7mwKbcFqmbwgA9H7KaV58V11CQjOJOsfVq/piBo2sNpQWn9DW8LulfiLCn7HDx O6Y833/Uuc0IGcRlCkY2b48m1hwIJijJOVfPjwAbxpJN0KP0l6LmHCsTx8mU/kA8GdaS fEgA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:dkim-signature :from; bh=2ZshhxfDzYbEYGQED/F6a9wFFimpy0Snbu15ROuv9hU=; b=OHtXCMOxBDj6dOTOd/PzahqGVZVqlHUWY5FORVLu7aLWeiYJPjcVsG8wlp1PqYo7d1 /k69lj7PuD8kxypb1dNDPH8RJdrekqW4GRgSk5kzlz+DEf2A+/mDBbVGM3bSNDcF0Mma 90hbws3EnJHIzZOXop9pPVUWNSbJvt4mhKZcxuHLVoTD1Q3pO27jkYq5xhW09j1kPc0V t02CiIiXh42eQSnHoU3DEThKu5HTje8BArs7vJIw2bt8GfHWg4tNtkUCIF2fnFN6fnD+ gohO+7i+D8iW5ECLkM5CxqIMrcMSHC8F28LFsYeG9hh4QZQhMo2c5Afr4OT4U75eIRQq jOnw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@weissschuh.net header.s=mail header.b="aBIaTe/p"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id t126-20020a637884000000b0053f0cdab81esi2922194pgc.357.2023.05.25.23.36.35; Thu, 25 May 2023 23:36:47 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@weissschuh.net header.s=mail header.b="aBIaTe/p"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242177AbjEZGar (ORCPT + 99 others); Fri, 26 May 2023 02:30:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34072 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236721AbjEZGam (ORCPT ); Fri, 26 May 2023 02:30:42 -0400 Received: from todd.t-8ch.de (todd.t-8ch.de [IPv6:2a01:4f8:c010:41de::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07100198; Thu, 25 May 2023 23:30:40 -0700 (PDT) From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1685082638; bh=xblaIv9ff9aMttaZ5noLw4QKOmOsHQttyPbx4HeNkGU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=aBIaTe/p6JjQq0FT0W+hke0XP4+ZW+GxSk6KU6/wqI5+NnjucL48g8oRUYy796ItH uFZwmXMYa8ydKVYECSB6NE2uaj7rUdmGqVL7b8SOMWCk2VLcqr+x6+WtODwc/oIiq0 lX3YXgUhR0ItTKAb3cTj7u+mFWIzxKde7HXj+LM8= Date: Fri, 26 May 2023 08:30:36 +0200 Subject: [PATCH 2/2] selftests/nolibc: prevent coredumps during test execution MIME-Version: 1.0 Message-Id: <20230526-nolibc-test-no-dump-v1-2-62e724a96db2@weissschuh.net> References: <20230526-nolibc-test-no-dump-v1-0-62e724a96db2@weissschuh.net> In-Reply-To: <20230526-nolibc-test-no-dump-v1-0-62e724a96db2@weissschuh.net> To: Willy Tarreau , Shuah Khan Cc: linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1685082638; l=989; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=xblaIv9ff9aMttaZ5noLw4QKOmOsHQttyPbx4HeNkGU=; b=W55tJ8CzyJL4M+FVgABk9pXBCFnXHrsLH3hnToGetBqPIwwwEBcGilciGbU+vX0BxHEW6SDlp +UPfiRhJkvDBYitn3jrkk6fitFufRaPCD1xjQISCxuhD/S9qRZBuUxX X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1766937599785775465?= X-GMAIL-MSGID: =?utf-8?q?1766937599785775465?= The child process forked during stackprotector tests intentionally gets killed with SIGABRT. By default this will trigger writing a coredump. The writing of the coredump can spam the systems coredump machinery and take some time. Timings for the full run of nolibc-test: Before: 200ms After: 20ms This is on a desktop x86 system with systemd-coredumpd enabled. Signed-off-by: Thomas Weißschuh --- tools/testing/selftests/nolibc/nolibc-test.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index 76a9a0f362b1..40fb684eaac9 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -831,6 +831,7 @@ static int run_protection(int min, int max) close(STDOUT_FILENO); close(STDERR_FILENO); + prctl(PR_SET_DUMPABLE, 0, 0, 0, 0); smash_stack(); return 1;