From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756138AbZHYTqz (ORCPT ); Tue, 25 Aug 2009 15:46:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756024AbZHYTqy (ORCPT ); Tue, 25 Aug 2009 15:46:54 -0400 Received: from hosting.visp.net.lb ([194.146.153.11]:40867 "EHLO hosting.visp.net.lb" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755936AbZHYTqy (ORCPT ); Tue, 25 Aug 2009 15:46:54 -0400 X-Greylist: delayed 362 seconds by postgrey-1.27 at vger.kernel.org; Tue, 25 Aug 2009 15:46:53 EDT From: Denys Fedoryschenko Organization: VISP To: gregkh@suse.de, linux-kernel@vger.kernel.org Subject: unable to handle kernel NULL pointer / tty / 2.6.31-rc7 Date: Tue, 25 Aug 2009 22:37:54 +0300 User-Agent: KMail/1.9.9 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200908252237.54324.denys@visp.net.lb> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Kernel 2.6.31-rc7 x86 , 32-bit gcc 4.4.1 Happened on heavy network load, i don't know if it is related. Here is part of remote syslog, notice failed dropbear ssh authentication. I guess if it is not fixed - it is critical to upcoming release, seems bug triggered by ssh worm. Aug 25 22:34:35 10.22.24.2 login[2099]: pam_radius_auth: DEBUG: getservbyname(radius, udp) returned -1209037784. Aug 25 22:34:36 10.22.24.2 login[2099]: pam_unix(login:auth): authentication failure; logname= uid=0 euid=0 tty=pts/0 ruser= rhost= user=root Aug 25 22:34:37 10.22.24.2 ripd[1862]: rip_read: cannot find interface for packet from 80.83.24.49 port 520 Aug 25 22:34:41 10.22.24.2 ripd[1862]: Neighbor 10.22.22.2 doesnt have connected interface! Aug 25 22:34:46 10.22.24.2 kernel: [22630.973706] BUG: unable to handle kernel NULL pointer dereference at (null) Aug 25 22:34:46 10.22.24.2 kernel: [22630.973807] IP: [] n_tty_read+0x3c6/0x5ad Full BUG message [22630.973706] BUG: unable to handle kernel NULL pointer dereference at (null) [22630.973807] IP: [] n_tty_read+0x3c6/0x5ad [22630.973909] *pdpt = 0000000032327001 *pde = 0000000000000000 [22630.973927] Oops: 0000 [#1] SMP [22630.973927] last sysfs file: /sys/devices/virtual/vc/vcsa3/dev [22630.973927] Modules linked in: cls_u32 sch_htb tun nf_defrag_ipv4 xt_MARK xt_mark xt_tcpudp rtc_cmos rtc_core rtc_lib iptable_mangle e1000e iptable_filter ip_tables [22630.973927] [22630.973927] Pid: 2100, comm: login Not tainted (2.6.31-rc7-build-0046-32bit #10) [22630.973927] EIP: 0060:[] EFLAGS: 00010246 CPU: 2 [22630.973927] EIP is at n_tty_read+0x3c6/0x5ad [22630.973927] EAX: 00000000 EBX: f23aa988 ECX: 00000002 EDX: 00000000 [22630.973927] ESI: f23aa800 EDI: 00000000 EBP: f64eef40 ESP: f64eeee0 [22630.973927] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 [22630.973927] Process login (pid: 2100, ti=f64ee000 task=f6f3a0a0 task.ti=f64ee000) [22630.973927] Stack: [22630.973927] bfd0ddac f3056200 f23aa91c f23aaba0 f23aabf8 00000000 00000000 00000000 [22630.973927] <0> 7fffffff 00000000 00000286 f23aa920 f23aa988 f23aa898 f23aa800 00000000 [22630.973927] <0> f6f3a0a0 c01293a4 f23aa920 f23aa920 bfd0ddac fffffffb f23aa800 c025144e [22630.973927] Call Trace: [22630.973927] [] ? default_wake_function+0x0/0xd [22630.973927] [] ? n_tty_read+0x0/0x5ad [22630.973927] [] ? tty_read+0x62/0x99 [22630.973927] [] ? tty_read+0x0/0x99 [22630.973927] [] ? vfs_read+0x87/0x110 [22630.973927] [] ? sys_read+0x3b/0x60 [22630.973927] [] ? syscall_call+0x7/0xb [22630.973927] Code: 4c 01 00 00 10 0f 85 95 00 00 00 e9 ae 00 00 00 8b 86 80 01 00 00 8b 5d d0 f0 0f b3 03 19 ff 8b 96 78 01 00 00 8b 86 80 01 00 00 <0f> be 04 02 89 [22630.973927] EIP: [] n_tty_read+0x3c6/0x5ad SS:ESP 0068:f64eeee0 [22630.973927] CR2: 0000000000000000 [22630.977423] ---[ end trace 688db8f89c0bcf7b ]--- [22630.977544] Kernel panic - not syncing: Fatal exception [22630.977672] Pid: 2100, comm: login Tainted: G D 2.6.31-rc7-build-0046-32bit #10 [22630.977842] Call Trace: [22630.977965] [] ? printk+0xf/0x17 [22630.978080] [] panic+0x39/0xd9 [22630.978197] [] oops_end+0x8b/0x9a [22630.978305] [] no_context+0x13d/0x147 [22630.978416] [] __bad_area_nosemaphore+0x113/0x11b [22630.978531] [] ? schedule+0x75d/0x7c7 [22630.978645] [] bad_area+0x30/0x39 [22630.978757] [] do_page_fault+0x16b/0x26f [22630.978872] [] ? do_page_fault+0x0/0x26f [22630.979007] [] error_code+0x66/0x6c [22630.979134] [] ? do_page_fault+0x0/0x26f [22630.979258] [] ? n_tty_read+0x3c6/0x5ad [22630.979377] [] ? default_wake_function+0x0/0xd [22630.979492] [] ? n_tty_read+0x0/0x5ad [22630.979605] [] tty_read+0x62/0x99 [22630.979712] [] ? tty_read+0x0/0x99 [22630.979820] [] vfs_read+0x87/0x110 [22630.979963] [] sys_read+0x3b/0x60