From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932468Ab1DYUi7 (ORCPT ); Mon, 25 Apr 2011 16:38:59 -0400 Received: from 1wt.eu ([62.212.114.60]:34443 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932345Ab1DYUZC (ORCPT ); Mon, 25 Apr 2011 16:25:02 -0400 Message-Id: <20110425200235.255443236@pcw.home.local> User-Agent: quilt/0.48-1 Date: Mon, 25 Apr 2011 22:03:24 +0200 From: Willy Tarreau To: linux-kernel@vger.kernel.org, stable@kernel.org, stable-review@kernel.org Cc: Dave Martin , Russell King , Greg Kroah-Hartman Subject: [PATCH 052/173] ARM: Ensure predictable endian state on signal handler entry In-Reply-To: <46075c3a3ef08be6d70339617d6afc98@local> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.27.59-stable review patch. If anyone has any objections, please let us know. ------------------ From: Russell King commit 53399053eb505cf541b2405bd9d9bca5ecfb96fb upstream. Ensure a predictable endian state when entering signal handlers. This avoids programs which use SETEND to momentarily switch their endian state from having their signal handlers entered with an unpredictable endian state. Acked-by: Dave Martin Signed-off-by: Russell King Signed-off-by: Greg Kroah-Hartman --- arch/arm/kernel/signal.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -389,7 +389,9 @@ setup_return(struct pt_regs *regs, struc unsigned long handler = (unsigned long)ka->sa.sa_handler; unsigned long retcode; int thumb = 0; - unsigned long cpsr = regs->ARM_cpsr & ~PSR_f; + unsigned long cpsr = regs->ARM_cpsr & ~(PSR_f | PSR_E_BIT); + + cpsr |= PSR_ENDSTATE; /* * Maybe we need to deliver a 32-bit signal to a 26-bit task.