From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.12] helo=sc8-sf-mx2.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1BeuPF-0007vM-C4 for user-mode-linux-devel@lists.sourceforge.net; Mon, 28 Jun 2004 04:34:37 -0700 Received: from ns.sysgo.de ([213.68.67.98] helo=mailgate.sysgo.de) by sc8-sf-mx2.sourceforge.net with esmtp (Exim 4.34) id 1BeuPE-0006MQ-3p for user-mode-linux-devel@lists.sourceforge.net; Mon, 28 Jun 2004 04:34:36 -0700 Received: from localhost (localhost [127.0.0.1]) by mailgate.sysgo.de (Postfix) with ESMTP id 34D4447C34 for ; Mon, 28 Jun 2004 13:33:59 +0200 (CEST) Received: from donald.sysgo.com (unknown [172.20.1.30]) by mailgate.sysgo.de (Postfix) with ESMTP id 294DF47C34 for ; Mon, 28 Jun 2004 13:33:59 +0200 (CEST) Message-ID: <40E0036D.2070108@sysgo.de> From: azu MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Subject: [uml-devel] Patch for arch/um/kernel/trap_kern.c to fix bad panic Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Mon, 28 Jun 2004 13:39:25 +0200 To: user-mode-linux-devel@lists.sourceforge.net Hi, I triggered the following panic from userspace in skas mode by mapping pages above 0xa0000000 ... The check is useless in skas-mode (kernel faults get filtered in segv() before handle_page_fault() is called), so I added an ifdef for tt mode. -Alex --- orig/arch/um/kernel/trap_kern.c 2004-06-28 13:08:41.000000000 +0200 +++ u4/arch/um/kernel/trap_kern.c 2004-06-28 13:08:52.000000000 +0200 @@ -52,8 +52,10 @@ if(is_write && !(vma->vm_flags & VM_WRITE)) goto out; page = address & PAGE_MASK; +#ifdef CONFIG_MODE_TT if(page == (unsigned long) current + PAGE_SIZE) panic("Kernel stack overflow"); +#endif pgd = pgd_offset(mm, page); pmd = pmd_offset(pgd, page); do { ------------------------------------------------------- This SF.Net email sponsored by Black Hat Briefings & Training. Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel