From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753559AbXJVRRY (ORCPT ); Mon, 22 Oct 2007 13:17:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752456AbXJVRRR (ORCPT ); Mon, 22 Oct 2007 13:17:17 -0400 Received: from ik-out-1112.google.com ([66.249.90.177]:3698 "EHLO ik-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751724AbXJVRRQ (ORCPT ); Mon, 22 Oct 2007 13:17:16 -0400 Message-ID: <44003d360710221017k58ce3c2cqb2feff2939b65dae@mail.gmail.com> Date: Mon, 22 Oct 2007 14:17:14 -0300 From: "Daniel Cid" To: linux-kernel@vger.kernel.org Subject: [BUG] Unable to handle kernel NULL pointer dereference MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi List, Sorry if it isn't the right place to ask this question, but I was reported the following error in the kernel. Syscheckd (process in the crash) is a userland (no kernel/lkm code) file integrity checking tool that scans the system and generates the md5/sha1 sum of all the files (if it helps to identify the problem). I am guessing it is a bug in the kernel, since no user process should cause this... [root@ss ossec]# uname -a Linux ss 2.6.9-55.0.9.ELsmp #1 SMP Thu Sep 27 18:27:41 EDT 2007 i686 i686 i386 GNU/Linux Oct 19 11:39:53 ss kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000 Oct 19 11:39:53 ss kernel: printing eip: Oct 19 11:39:53 ss kernel: c0190182 Oct 19 11:39:53 ss kernel: *pde = 359c6001 Oct 19 11:39:53 ss kernel: Oops: 0000 [#1] Oct 19 11:39:53 ss kernel: SMP Oct 19 11:39:53 ss kernel: Modules linked in: parport_pc lp parport autofs4 crc32c libcrc32c iscsi_sfnet scsi_transport_iscsi i2c_dev i2c_ core lock_dlm(U) gfs(U) lock_harness(U) dlm(U) cman(U) md5 ipv6 sunrpc button battery ac joydev ohci_hcd e1000 floppy sg dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod ips mptscsih mptsas mptspi mptfc mptscsi mptbase sd_mod scsi_mod Oct 19 11:39:53 ss kernel: CPU: 3 Oct 19 11:39:53 ss kernel: EIP: 0060:[] Not tainted VLI Oct 19 11:39:53 ss kernel: EFLAGS: 00010246 (2.6.9-55.0.9.ELsmp) Oct 19 11:39:53 ss kernel: EIP is at sysfs_readdir+0x123/0x187 Oct 19 11:39:53 ss kernel: eax: 00000000 ebx: c7174ec0 ecx: ffffffff edx: 00000000 Oct 19 11:39:53 ss kernel: esi: c7174ec4 edi: 00000000 ebp: e66758c4 esp: f5ad3f60 Oct 19 11:39:53 ss kernel: ds: 007b es: 007b ss: 0068 Oct 19 11:39:53 ss kernel: Process ossec-syscheckd (pid: 4750, threadinfo=f5ad3000 task=f5f06eb0) Oct 19 11:39:53 ss kernel: Stack: bff835ac f7e63900 c016baf5 f5ad3fa0 f4e18180 c0332640 f4e18180 f7ddb768 Oct 19 11:39:53 ss kernel: c016baf5 c016b771 f5ad3fa0 ffffffda 08b499e4 f4e18180 00000000 c016bdab Oct 19 11:39:54 ss kernel: 08b49b2c 08b49b14 00000eb8 ffffffea 00000009 08b499c8 00407ff4 f5ad3000 Oct 19 11:39:54 ss kernel: Call Trace: Oct 19 11:39:54 ss kernel: [] filldir64+0x0/0x11a Oct 19 11:39:54 ss kernel: [] filldir64+0x0/0x11a Oct 19 11:39:54 ss kernel: [] vfs_readdir+0x7d/0xa5 Oct 19 11:39:54 ss kernel: [] sys_getdents64+0x80/0xba Oct 19 11:39:54 ss kernel: [] syscall_call+0x7/0xb Oct 19 11:39:54 ss kernel: [] unix_dgram_sendmsg+0x23c/0x45d Oct 19 11:39:54 ss kernel: Code: 04 89 69 0c 8b 75 00 8b 44 24 04 83 c0 0c 39 c6 74 73 8d 5e fc 83 7b 14 00 74 66 89 d8 e8 07 ec ff ff 89 c2 83 c9 ff 31 c0 89 d7 ae f7 d1 49 0f b7 43 1c c1 e8 0c 50 ff 73 20 8b 44 24 18 ff Oct 19 11:39:54 ss kernel: <0>Fatal exception: panic in 5 seconds A similar problem was also reported in here: http://lists.centos.org/pipermail/centos/2007-August/085252.html Any clues? Thanks,