From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756841Ab1IIAWW (ORCPT ); Thu, 8 Sep 2011 20:22:22 -0400 Received: from peace.netnation.com ([204.174.223.2]:36098 "EHLO peace.netnation.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756711Ab1IIAWL (ORCPT ); Thu, 8 Sep 2011 20:22:11 -0400 Date: Thu, 8 Sep 2011 15:24:20 -0700 From: Simon Kirby To: linux-kernel@vger.kernel.org Subject: [3.1-rc4] vfs_rmdir() -> mutex_unlock() Oops Message-ID: <20110908222420.GE8043@hostway.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This box primarily does most of its VFS stuff over lots of NFS mounts, but has some local EXT3 filesystems. This has happened a couple of times: BUG: unable to handle kernel NULL pointer dereference at 00000000000000b8 IP: [] mutex_unlock+0x1/0x20 PGD 12e07e067 PUD 102dfa067 PMD 0 Oops: 0002 [#1] SMP CPU 3 Modules linked in: ipmi_devintf ipmi_si ipmi_msghandler xt_recent nf_conntrack_ftp xt_state xt_owner nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 bnx2 [445464.657194] Pid: 13796, comm: php Tainted: G W 3.1.0-rc4-hw+ #27 Dell Inc. PowerEdge 1950/0UR033 RIP: 0010:[] [] mutex_unlock+0x1/0x20 RSP: 0018:ffff8801381c7e58 EFLAGS: 00010206 RAX: 00000000fffffffe RBX: ffff88002e95aca8 RCX: ffff88010712dc70 RDX: 0000000040000200 RSI: ffff880126d21cc0 RDI: 00000000000000a0 RBP: ffff8801381c7e88 R08: 0000000026361000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000002 R12: 00000000fffffffe R13: ffff880126d21cc0 R14: 00007f0a6e0ba9d8 R15: 00007f0a6e0bd258 FS: 00007f0a6e1c1720(0000) GS:ffff88022fcc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000b8 CR3: 000000012692a000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process php (pid: 13796, threadinfo ffff8801381c6000, task ffff88003ed4d900) Stack: ffff8801381c7e88 ffffffff8110e680 ffff8801381c7e98 ffff880126d21cc0 ffff8801381c7e98 0000000000000000 ffff8801381c7f68 ffffffff8110e7a6 ffff880225eed800 ffff8800bea6d780 00000004018245d5 ffff88003ed0b03b Call Trace: [] ? vfs_rmdir+0xb0/0x100 [] do_rmdir+0xd6/0x130 [] ? sys_newlstat+0x31/0x50 [] sys_rmdir+0x11/0x20 [] system_call_fastpath+0x16/0x1b Code: 0f 79 05 e8 d2 00 00 00 65 48 8b 04 25 c0 b5 00 00 48 8b 1c 24 49 89 44 24 18 4c 8b 64 24 08 c9 c3 66 0f 1f 84 00 00 00 00 00 55 c7 47 18 00 00 00 00 48 89 e5 f0 ff 07 7f 05 e8 4a 00 00 00 RIP [] mutex_unlock+0x1/0x20 RSP CR2: 00000000000000b8 ---[ end trace 3ad1ff5004f78cbb ]--- I don't see any relevant changes in Linus HEAD yet. This build was of 9e79e3e9dd9672b37ac9412e9a926714306551fe (slightly past 3.1-rc4). Simon-