From nobody Mon Feb 9 23:38:23 2026 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 BAB4CC7EE43 for ; Mon, 12 Jun 2023 20:51:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236654AbjFLUvw (ORCPT ); Mon, 12 Jun 2023 16:51:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35786 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238368AbjFLUtu (ORCPT ); Mon, 12 Jun 2023 16:49:50 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 500482106 for ; Mon, 12 Jun 2023 13:47:06 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1E5E262BED for ; Mon, 12 Jun 2023 20:45:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E690C43323; Mon, 12 Jun 2023 20:45:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1686602717; bh=YSnDd8eIZWAVVkXrAR2iFLMVAjImLZBexFy3GV2smU4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jqPbOGExUPnvOck2RN1WO9wxecIiO7nVEipYAmWrLM6powvhfty5dd2arfDL8o8MK +rnU6nV/FKY19zKCzDsWkSXE6UYVNpsn6S7qpgOF8tmC2zYLG1iainbN3FyMQm2+GQ swvICHPmRQp/6/PWmXyRORqLAO/z97YwdosPE6+0ippOcXn3wfmL/2RniVpZurM0Yk GUzVjbI/A5s6waLiD7OXvNYdy8Fdh9dSRtJSyaqU5Q7pVkFfB03vmEETUyG8GzYxEK 3pC5b7u8lReTcOx2+b0rqrvkoFUDwip9ZwcxnDGnC9eWQYQq8O5dvmejxGTmVW5X6I meIOnIg89Zmrw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 0423DCE3A7E; Mon, 12 Jun 2023 13:45:16 -0700 (PDT) From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: gwml@vger.gnuweeb.org, kernel-team@meta.com, w@lwt.eu, =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , Willy Tarreau , "Paul E . McKenney" Subject: [PATCH v2 nolibc 35/53] selftests/nolibc: prevent coredumps during test execution Date: Mon, 12 Jun 2023 13:44:56 -0700 Message-Id: <20230612204514.292087-35-paulmck@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <8b757cc0-3719-4e63-a755-9710384137bc@paulmck-laptop> References: <8b757cc0-3719-4e63-a755-9710384137bc@paulmck-laptop> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thomas Wei=C3=9Fschuh 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 Wei=C3=9Fschuh Signed-off-by: Willy Tarreau Signed-off-by: Paul E. McKenney --- 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/s= elftests/nolibc/nolibc-test.c index 6db788603a34..84a1b02eb6f9 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); =20 + prctl(PR_SET_DUMPABLE, 0, 0, 0, 0); smash_stack(); return 1; =20 --=20 2.40.1