From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752866AbbJaIz2 (ORCPT ); Sat, 31 Oct 2015 04:55:28 -0400 Received: from terminus.zytor.com ([198.137.202.10]:60311 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751529AbbJaIzZ (ORCPT ); Sat, 31 Oct 2015 04:55:25 -0400 Date: Sat, 31 Oct 2015 01:54:47 -0700 From: tip-bot for Andy Lutomirski Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, luto@kernel.org, tglx@linutronix.de, stsp@list.ru, torvalds@linux-foundation.org, mingo@kernel.org, bp@alien8.de, brgerst@gmail.com Reply-To: luto@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, brgerst@gmail.com, bp@alien8.de, mingo@kernel.org, torvalds@linux-foundation.org, stsp@list.ru, tglx@linutronix.de In-Reply-To: <08f83295460a80e41dc5e3e81ec40d6844d316f5.1446270067.git.luto@kernel.org> References: <08f83295460a80e41dc5e3e81ec40d6844d316f5.1446270067.git.luto@kernel.org> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/urgent] selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs Git-Commit-ID: 226f1f729ce277720fab60c91dd1b12574cfe66c X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 226f1f729ce277720fab60c91dd1b12574cfe66c Gitweb: http://git.kernel.org/tip/226f1f729ce277720fab60c91dd1b12574cfe66c Author: Andy Lutomirski AuthorDate: Fri, 30 Oct 2015 22:42:45 -0700 Committer: Thomas Gleixner CommitDate: Sat, 31 Oct 2015 09:50:25 +0100 selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs Mere possession of vm86 state is strange. Make sure that nothing gets corrupted if we fork after calling vm86(). Signed-off-by: Andy Lutomirski Cc: Brian Gerst Cc: Linus Torvalds Cc: Borislav Petkov Cc: Stas Sergeev Link: http://lkml.kernel.org/r/08f83295460a80e41dc5e3e81ec40d6844d316f5.1446270067.git.luto@kernel.org Signed-off-by: Thomas Gleixner --- tools/testing/selftests/x86/entry_from_vm86.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c index 421c607..d075ea0 100644 --- a/tools/testing/selftests/x86/entry_from_vm86.c +++ b/tools/testing/selftests/x86/entry_from_vm86.c @@ -230,5 +230,9 @@ int main(void) } clearhandler(SIGSEGV); + /* Make sure nothing explodes if we fork. */ + if (fork() > 0) + return 0; + return (nerrs == 0 ? 0 : 1); }