From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753287AbZJ1L4E (ORCPT ); Wed, 28 Oct 2009 07:56:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753103AbZJ1L4D (ORCPT ); Wed, 28 Oct 2009 07:56:03 -0400 Received: from mail-ew0-f208.google.com ([209.85.219.208]:45823 "EHLO mail-ew0-f208.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753051AbZJ1L4B (ORCPT ); Wed, 28 Oct 2009 07:56:01 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=date:from:to:cc:subject:message-id:mime-version:content-type :content-disposition:user-agent; b=QKcuMFec3abGYQqXIE9r8A0q/1nXw1Xs+1MS4nEYdep/8gmhLlYfS8nSuz7X7uoE73 AbnGiy+S1nmX8NjDudrgUyvymI2wf+Tc06GlQ0prOXMeNKQ29JIMNb6Ck+/sgpqla+k/ QLawT5d/0reBcKsLpuyTYkUO/x3eSBGp9xBBE= Date: Wed, 28 Oct 2009 14:56:02 +0300 From: Alexey Dobriyan To: akpm@linux-foundation.org Cc: m.s.tsirkin@gmail.com, linux-kernel@vger.kernel.org, stefani@seibold.net Subject: [PATCH] proc: fix ->stack_start in compat mode Message-ID: <20091028115602.GA26295@x200> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Assign tsk->stack_start even when doing compat execve(2). As side effect, fix segfault inside boehm-gc library. http://bugzilla.kernel.org/show_bug.cgi?id=14478 Signed-off-by: Alexey Dobriyan --- Michael, please, confirm. Stefani, I get "Stack usage: 0 kB", you may want to look at it. fs/compat.c | 2 ++ 1 file changed, 2 insertions(+) --- a/fs/compat.c +++ b/fs/compat.c @@ -1532,6 +1532,8 @@ int compat_do_execve(char * filename, if (retval < 0) goto out; + current->stack_start = current->mm->start_stack; + /* execve succeeded */ current->fs->in_exec = 0; current->in_execve = 0;