Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760890AbXEMWrb (ORCPT ); Sun, 13 May 2007 18:47:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755415AbXEMWrY (ORCPT ); Sun, 13 May 2007 18:47:24 -0400 Received: from smtp1.linux-foundation.org ([65.172.181.25]:56449 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755186AbXEMWrY (ORCPT ); Sun, 13 May 2007 18:47:24 -0400 Date: Sun, 13 May 2007 15:47:18 -0700 From: Andrew Morton To: Nicolas.Mailhot@LaPoste.net Cc: "bugme-daemon@kernel-bugs.osdl.org" , linux-kernel@vger.kernel.org Subject: Re: [Bug 8473] New: Oops: 0010 [1] SMP Message-Id: <20070513154718.bb338ceb.akpm@linux-foundation.org> In-Reply-To: <200705132102.l4DL2onF003014@fire-2.osdl.org> References: <200705132102.l4DL2onF003014@fire-2.osdl.org> X-Mailer: Sylpheed 2.4.1 (GTK+ 2.8.17; x86_64-unknown-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4021 Lines: 88 On Sun, 13 May 2007 14:02:50 -0700 bugme-daemon@bugzilla.kernel.org wrote: > http://bugzilla.kernel.org/show_bug.cgi?id=8473 Please follow up via emailed reply-to-all. In fact, please report -mm bugs via email. bugzilla is more suited to longer-term problems, and -mm bugs are super-short-term, we hope. > Summary: Oops: 0010 [1] SMP > Kernel Version: 2.6.21-mm2 > Status: NEW > Severity: high > Owner: akpm@osdl.org > Submitter: Nicolas.Mailhot@LaPoste.net > > > Most recent kernel where this bug did *NOT* occur: 2.6.21-mm1 (though I didn't > test it that long) > Distribution: Fedora Devel > Hardware Environment: AMD C2 on CK804 > Software Environment: Normal workload (building a small package) > Problem Description: > > Steps to reproduce: > May 13 22:59:43 rousalka kernel: Unable to handle kernel NULL pointer > dereference at 0000000000000000 RIP: > May 13 22:59:43 rousalka kernel: [<0000000000000000>] > May 13 22:59:43 rousalka kernel: PGD bf1a067 PUD f295067 PMD 0 > May 13 22:59:43 rousalka kernel: Oops: 0010 [1] SMP > May 13 22:59:43 rousalka kernel: CPU 0 > May 13 22:59:43 rousalka kernel: Pid: 8758, comm: bash Not tainted > 2.6.21-9.mm2.fc7.nim #1 > May 13 22:59:43 rousalka kernel: RIP: 0010:[<0000000000000000>] > [<0000000000000000>] > May 13 22:59:43 rousalka kernel: RSP: 0018:ffff81000ffedee0 EFLAGS: 00010296 > May 13 22:59:43 rousalka kernel: RAX: ffffffff804426a0 RBX: ffff81000abe6a80 > RCX: 00007fff565bbdc4 > May 13 22:59:43 rousalka kernel: RDX: 0000000000005410 RSI: ffff81000abe6a80 > RDI: ffff810009cc6fa0 > May 13 22:59:43 rousalka kernel: RBP: 00007fff565bbdc4 R08: 0000000000000000 > R09: 00000000009033a4 > May 13 22:59:43 rousalka kernel: R10: 0000000000000008 R11: 0000000000000246 > R12: 0000000000005410 > May 13 22:59:43 rousalka kernel: R13: 00000000000000ff R14: 00000000000000ff > R15: 0000000000000000 > May 13 22:59:43 rousalka kernel: FS: 00002b2d544faf40(0000) > GS:ffffffff8056b000(0000) knlGS:0000000000000000 > May 13 22:59:43 rousalka kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > May 13 22:59:43 rousalka kernel: CR2: 0000000000000000 CR3: 000000000bdf4000 > CR4: 00000000000006e0 > May 13 22:59:43 rousalka kernel: Process bash (pid: 8758, threadinfo > ffff81000ffec000, task ffff81000bc82ac0) > May 13 22:59:43 rousalka kernel: Stack: ffffffff8028545d ffff81000abe6a80 > 00007fff565bbdc4 00007fff565bbdc4 > May 13 22:59:43 rousalka kernel: ffffffff802856ca 0000000000005410 > 00000000000000ff ffff81000abe6a80 > May 13 22:59:43 rousalka kernel: 0000000000000000 00007fff565bbdc4 > 0000000000005410 00000000000000ff > May 13 22:59:43 rousalka kernel: Call Trace: > May 13 22:59:43 rousalka kernel: [] do_ioctl+0x55/0x6b > May 13 22:59:43 rousalka kernel: [] vfs_ioctl+0x257/0x270 > May 13 22:59:43 rousalka kernel: [] sys_ioctl+0x59/0x79 > May 13 22:59:43 rousalka kernel: [] tracesys+0xdc/0xe1 > May 13 22:59:43 rousalka kernel: > May 13 22:59:43 rousalka kernel: INFO: lockdep is turned off. > May 13 22:59:43 rousalka kernel: > May 13 22:59:43 rousalka kernel: Code: Bad RIP value. > May 13 22:59:43 rousalka kernel: RIP [<0000000000000000>] > May 13 22:59:43 rousalka kernel: RSP > May 13 22:59:43 rousalka kernel: CR2: 0000000000000000 Anything you can do to make that wordwrapping go away for ever would be great, thanks. I don't know what would have caused this. do_ioctl() did a jump-to-zero, but it has code in there to explicitly test for null pointers. Perhaps some weird race, although I find it hard to imagine how we could have such a race in any ioctl which bash is likely to be calling. Is it repeatable at all? - 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/