Re: [Bugme-new] [Bug 13975] New: BUG: unable to handle kernel paging request at 000d7a0b
From: Andrew Morton <akpm@linux-foundation.org>
Date: 2009-08-13 20:52:22
(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface). On Thu, 13 Aug 2009 14:02:01 GMT bugzilla-daemon@bugzilla.kernel.org wrote:
http://bugzilla.kernel.org/show_bug.cgi?id=13975 Summary: BUG: unable to handle kernel paging request at 000d7a0b Product: Memory Management Version: 2.5 Kernel Version: 2.6.30.4 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Page Allocator AssignedTo: akpm@linux-foundation.org ReportedBy: tonywhite100@googlemail.com Regression: Yes
Interesting.
Last kernel version tried was 2.6.30.1 and I did not experience this bug using that kernel. The crash happens randomly at boot and requires an fsck to fix. The kernel locks up. Here's the interesting part of the log : Aug 13 07:54:02 pentium-three kernel: BUG: unable to handle kernel paging request at 000d7a0b Aug 13 07:54:02 pentium-three kernel: IP: [<c01596d4>] m_show+0x94/0x190 Aug 13 07:54:02 pentium-three kernel: *pde = 00000000 Aug 13 07:54:02 pentium-three kernel: Oops: 0000 [#1] PREEMPT SMP Aug 13 07:54:02 pentium-three kernel: last sysfs file: /sys/module/nf_conntrack_ftp/initstate Aug 13 07:54:02 pentium-three kernel: Modules linked in: fuse af_packet xt_tcpudp xt_limit nf_conntrack_ipv4 nf_defrag_ipv4 xt_state ipt_LOG ipt_REJECT nf_conntrack_ftp nf_conntrack iptable_filter ip_tables x_tables dm_crypt rt2500usb arc4 snd_cmipci ecb gameport snd_pcm_oss snd_mixer_oss snd_pcm snd_page_alloc snd_opl3_lib rt73usb snd_hwdep crc_itu_t snd_mpu401_uart snd_seq_dummy snd_seq_oss rt2x00usb snd_seq_midi rt2x00lib snd_rawmidi led_class input_polldev snd_seq_midi_event snd_seq mac80211 snd_timer snd_seq_device cfg80211 snd evdev parport_pc rtc_cmos soundcore pcspkr rtc_core parport i2c_piix4 rtc_lib i2c_core shpchp pci_hotplug ext4 mbcache jbd2 crc16 dm_mirror dm_region_hash dm_log dm_snapshot dm_mod usbhid hid sg sr_mod cdrom sd_mod pata_acpi ata_generic ata_piix uhci_hcd libata 8139too ehci_hcd floppy 8139cp scsi_mod usbcore mii intel_agp Aug 13 07:54:02 pentium-three kernel: Aug 13 07:54:02 pentium-three kernel: Pid: 2489, comm: lsmod Not tainted (2.6.30-4.slh.2-sidux-686 #1) To be Filled Aug 13 07:54:02 pentium-three kernel: EIP: 0060:[<c01596d4>] EFLAGS: 00010246 CPU: 0 Aug 13 07:54:02 pentium-three kernel: EIP is at m_show+0x94/0x190 Aug 13 07:54:02 pentium-three kernel: EAX: 00000000 EBX: 000d7a0b ECX: de10fef4 EDX: 00000000 Aug 13 07:54:02 pentium-three kernel: ESI: e100fc98 EDI: df169660 EBP: e100fb60 ESP: de10fee8 Aug 13 07:54:02 pentium-three kernel: DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Aug 13 07:54:02 pentium-three kernel: Process lsmod (pid: 2489, ti=de10e000 task=ddd0c840 task.ti=de10e000) Aug 13 07:54:02 pentium-three kernel: Stack: Aug 13 07:54:02 pentium-three kernel: df169660 c041097e e11ebc4c 0000e764 e100fb64 c102a2e0 00010246 00000000 Aug 13 07:54:02 pentium-three kernel: df169660 e100fb64 00000035 c01d3d56 00000200 00000000 000003fa b7f95006 Aug 13 07:54:02 pentium-three kernel: df1aca80 df169688 00000006 00000061 0000002b 00000000 0000002a 00000000 Aug 13 07:54:02 pentium-three kernel: Call Trace: Aug 13 07:54:02 pentium-three kernel: [<c01d3d56>] ? seq_read+0x206/0x3d0 Aug 13 07:54:02 pentium-three kernel: [<c01d3b50>] ? seq_read+0x0/0x3d0 Aug 13 07:54:02 pentium-three kernel: [<c01f84e4>] ? proc_reg_read+0x64/0xa0 Aug 13 07:54:02 pentium-three kernel: [<c01f8480>] ? proc_reg_read+0x0/0xa0 Aug 13 07:54:02 pentium-three kernel: [<c01bb59d>] ? vfs_read+0x9d/0x160 Aug 13 07:54:02 pentium-three kernel: [<c01bb731>] ? sys_read+0x41/0x80 Aug 13 07:54:02 pentium-three kernel: [<c010394c>] ? sysenter_do_call+0x12/0x28 Aug 13 07:54:02 pentium-three kernel: Code: c6 34 01 00 00 39 f3 74 31 8d b6 00 00 00 00 8b 43 08 89 3c 24 c7 44 24 04 7e 09 41 c0 83 c0 0c 89 44 24 08 e8 ce a2 07 00 8b 1b <8b> 03 0f 18 00 90 39 f3 75 da b8 01 00 00 00 8b 8d d4 00 00 00 Aug 13 07:54:02 pentium-three kernel: EIP: [<c01596d4>] m_show+0x94/0x190 SS:ESP 0068:de10fee8 Aug 13 07:54:02 pentium-three kernel: CR2: 00000000000d7a0b Aug 13 07:54:02 pentium-three kernel: ---[ end trace 1e50990a393b4447 ]--- I'll attach lspci and if there is any other information required please just ask and I'll post it.
We died running `lsmod'. We died in kernel/module.c:m_show(). The last sysfs file which userspace accessed was /sys/module/nf_conntrack_ftp/initstate.
From which I surmise that nf_conntrack_ftp has somehow done something
bad to the module-related metadata which kernel/module.c presents to userspace via /sys/module/nf_conntrack_ftp/initstate. Or something like that. Tell me: had you done any `rmmod's on that machine? Perhaps of netfilter modules? If so, perhaps netfilter didn't properly clean up after itself or something. Oh. "The crash happens randomly at boot". That makes it hard.