From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759267Ab0GAV0X (ORCPT ); Thu, 1 Jul 2010 17:26:23 -0400 Received: from kroah.org ([198.145.64.141]:33299 "EHLO coco.kroah.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933212Ab0GAVPp (ORCPT ); Thu, 1 Jul 2010 17:15:45 -0400 X-Mailbox-Line: From gregkh@clark.site Thu Jul 1 10:43:03 2010 Message-Id: <20100701174303.399797739@clark.site> User-Agent: quilt/0.48-10.1 Date: Thu, 01 Jul 2010 10:44:50 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: stable-review@kernel.org, torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Helge Deller , Kyle McMartin Subject: [200/200] parisc: clear floating point exception flag on SIGFPE signal In-Reply-To: <20100701175201.GA2149@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 2.6.34-stable review patch. If anyone has any objections, please let me know. ------------------ From: Helge Deller commit 550f0d922286556c7ea43974bb7921effb5a5278 upstream. Clear the floating point exception flag before returning to user space. This is needed, else the libc trampoline handler may hit the same SIGFPE again while building up a trampoline to a signal handler. Fixes debian bug #559406. Signed-off-by: Helge Deller Signed-off-by: Kyle McMartin Signed-off-by: Greg Kroah-Hartman --- arch/parisc/math-emu/decode_exc.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/parisc/math-emu/decode_exc.c +++ b/arch/parisc/math-emu/decode_exc.c @@ -342,6 +342,7 @@ decode_fpu(unsigned int Fpu_register[], return SIGNALCODE(SIGFPE, FPE_FLTINV); case DIVISIONBYZEROEXCEPTION: update_trap_counts(Fpu_register, aflags, bflags, trap_counts); + Clear_excp_register(exception_index); return SIGNALCODE(SIGFPE, FPE_FLTDIV); case INEXACTEXCEPTION: update_trap_counts(Fpu_register, aflags, bflags, trap_counts);