Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751020Ab2BZFvP (ORCPT ); Sun, 26 Feb 2012 00:51:15 -0500 Received: from terminus.zytor.com ([198.137.202.10]:39885 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750774Ab2BZFvO (ORCPT ); Sun, 26 Feb 2012 00:51:14 -0500 Date: Sat, 25 Feb 2012 21:50:35 -0800 From: tip-bot for Bobby Powers Message-ID: Cc: linux-kernel@vger.kernel.org, bobbypowers@gmail.com, hpa@zytor.com, mingo@redhat.com, tglx@linutronix.de Reply-To: mingo@redhat.com, hpa@zytor.com, bobbypowers@gmail.com, linux-kernel@vger.kernel.org, tglx@linutronix.de In-Reply-To: <1330230338-25077-1-git-send-email-bobbypowers@gmail.com> References: <1330230338-25077-1-git-send-email-bobbypowers@gmail.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/x32] x32: Make sure TS_COMPAT is cleared for x32 tasks Git-Commit-ID: ce5f7a99df87918b5be4618a9386213a8e9a7146 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 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6 (terminus.zytor.com [127.0.0.1]); Sat, 25 Feb 2012 21:50:56 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1674 Lines: 40 Commit-ID: ce5f7a99df87918b5be4618a9386213a8e9a7146 Gitweb: http://git.kernel.org/tip/ce5f7a99df87918b5be4618a9386213a8e9a7146 Author: Bobby Powers AuthorDate: Sat, 25 Feb 2012 23:25:38 -0500 Committer: H. Peter Anvin CommitDate: Sat, 25 Feb 2012 20:42:18 -0800 x32: Make sure TS_COMPAT is cleared for x32 tasks If a process has a non-x32 ia32 personality and changes to x32, the process would keep its TS_COMPAT flag. x32 uses the presence of the x32 flag on a syscall to determine compat status, so make sure TS_COMPAT is cleared. Signed-off-by: Bobby Powers Link: http://lkml.kernel.org/r/1330230338-25077-1-git-send-email-bobbypowers@gmail.com Signed-off-by: H. Peter Anvin --- arch/x86/kernel/process_64.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index a0701da..32e0412 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -540,6 +540,9 @@ void set_personality_ia32(bool x32) clear_thread_flag(TIF_IA32); set_thread_flag(TIF_X32); current->personality &= ~READ_IMPLIES_EXEC; + /* is_compat_task() uses the presence of the x32 + syscall bit flag to determine compat status */ + current_thread_info()->status &= ~TS_COMPAT; } else { set_thread_flag(TIF_IA32); clear_thread_flag(TIF_X32); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/