I've just had the following emailed to me by logcheck, I've never
seen anything like this before, the machine is a new setup been
running for a week in production environment without problem.
The server is configured for Dovecot pop3 / Imap and Sendmail SMTP
running on Debian Stable with 2.6 kernel. Can anyone help me make
sense of this output?
Mar 15 13:02:09 pop kernel: Unable to handle kernel NULL pointer
dereference at virtual address 00000004
Mar 15 13:02:09 pop kernel: printing eip:
Mar 15 13:02:09 pop kernel: e08993f0
Mar 15 13:02:09 pop kernel: *pde = 00000000
Mar 15 13:02:09 pop kernel: Oops: 0000 [#1]
Mar 15 13:02:09 pop kernel: PREEMPT
Mar 15 13:02:09 pop kernel: Modules linked in: af_packet ipv6
parport_pc parport floppy evdev pcspkr shpchp pciehp pci_hotplug
intel_agp uhci_hcd usbcore e100 mii 3c59x agpgart capability
commoncap psmouse ide_cd cdrom genrtc ext3 jbd ide_generic piix
ide_disk ide_core raid1 md unix font vesafb cfbcopyarea cfbimgblt
cfbfillrect
Mar 15 13:02:09 pop kernel: CPU: 0
Mar 15 13:02:09 pop kernel: EIP: 0060:
[__crc_cpufreq_register_governor+1979622/5743486] Not tainted
Mar 15 13:02:09 pop kernel: EFLAGS: 00010202 (2.6.8-2-386)
Mar 15 13:02:09 pop kernel: EIP is at __journal_remove_journal_head
+0x9/0x126 [jbd]
Mar 15 13:02:09 pop kernel: eax: c8172968 ebx: 00000000 ecx:
c802677c edx: c817296c
Mar 15 13:02:09 pop kernel: esi: c8172968 edi: 00000001 ebp:
c817296c esp: c968fdd8
Mar 15 13:02:09 pop kernel: ds: 007b es: 007b ss: 0068
Mar 15 13:02:09 pop kernel: Process mv (pid: 3238,
threadinfo=c968e000 task=deb381b0)
Mar 15 13:02:09 pop kernel: Stack: c968e000 c802677c e0899522
c8172968 c8172968 e0894996 c8172968 c968e000
Mar 15 13:02:09 pop kernel: c802677c cf106700 e0894b70
c802677c cf106700 00000001 c817296c c112ac00
Mar 15 13:02:09 pop kernel: c817296c c817296c e0894c7a
dfbb3980 c817296c 00001000 00000001 c112ac00
Mar 15 13:02:09 pop kernel: Call Trace:
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1979928/5743486] journal_remove_journal_head+0x15/0x28 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1960588/5743486] __dispose_buffer+0x38/0x46 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1961062/5743486] journal_unmap_buffer+0x1cc/0x264 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1961328/5743486] journal_invalidatepage+0x72/0xe3 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+2293996/5743486] ext3_invalidatepage+0x2f/0x33 [ext3]
Mar 15 13:02:09 pop kernel: [do_invalidatepage+29/32]
do_invalidatepage+0x1d/0x20
Mar 15 13:02:09 pop kernel: [truncate_complete_page+29/96]
truncate_complete_page+0x1d/0x60
Mar 15 13:02:09 pop kernel: [truncate_inode_pages+135/549]
truncate_inode_pages+0x87/0x225
Mar 15 13:02:09 pop kernel: [vfs_rename_other+208/216]
vfs_rename_other+0xd0/0xd8
Mar 15 13:02:09 pop kernel: [generic_delete_inode+95/285]
generic_delete_inode+0x5f/0x11d
Mar 15 13:02:09 pop kernel: [iput+100/103] iput+0x64/0x67
Mar 15 13:02:09 pop kernel: [dput+395/460] dput+0x18b/0x1cc
Mar 15 13:02:09 pop kernel: [sys_rename+363/454] sys_rename+0x16b/0x1c6
Mar 15 13:02:09 pop kernel: [sys_lstat64+32/39] sys_lstat64+0x20/0x27
Mar 15 13:02:09 pop kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Mar 15 13:02:09 pop kernel: Code: 83 7b 04 00 79 29 68 02 b4 89 e0 68
e2 06 00 00 68 2e b3 89
Mar 15 13:02:09 pop kernel: <6>note: mv[3238] exited with
preempt_count 4
Mar 15 13:02:09 pop kernel: bad: scheduling while atomic!
Mar 15 13:02:09 pop kernel: [schedule+60/998] schedule+0x3c/0x3e6
Mar 15 13:02:09 pop kernel: [unmap_vmas+224/463] unmap_vmas+0xe0/0x1cf
Mar 15 13:02:09 pop kernel: [unmap_vmas+354/463] unmap_vmas+0x162/0x1cf
Mar 15 13:02:09 pop kernel: [exit_mmap+106/298] exit_mmap+0x6a/0x12a
Mar 15 13:02:09 pop kernel: [mmput+94/115] mmput+0x5e/0x73
Mar 15 13:02:09 pop kernel: [do_exit+354/847] do_exit+0x162/0x34f
Mar 15 13:02:09 pop kernel: [do_page_fault+0/1183] do_page_fault
+0x0/0x49f
Mar 15 13:02:09 pop kernel: [do_divide_error+0/167] do_divide_error
+0x0/0xa7
Mar 15 13:02:09 pop kernel: [do_page_fault+868/1183] do_page_fault
+0x364/0x49f
Mar 15 13:02:09 pop kernel: [scheduler_tick+107/924] scheduler_tick
+0x6b/0x39c
Mar 15 13:02:09 pop kernel: [update_process_times+41/47]
update_process_times+0x29/0x2f
Mar 15 13:02:09 pop kernel: [do_page_fault+0/1183] do_page_fault
+0x0/0x49f
Mar 15 13:02:09 pop kernel: [error_code+45/56] error_code+0x2d/0x38
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1979622/5743486] __journal_remove_journal_head+0x9/0x126 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1979928/5743486] journal_remove_journal_head+0x15/0x28 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1960588/5743486] __dispose_buffer+0x38/0x46 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1961062/5743486] journal_unmap_buffer+0x1cc/0x264 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+1961328/5743486] journal_invalidatepage+0x72/0xe3 [jbd]
Mar 15 13:02:09 pop kernel: [__crc_cpufreq_register_governor
+2293996/5743486] ext3_invalidatepage+0x2f/0x33 [ext3]
Mar 15 13:02:09 pop kernel: [do_invalidatepage+29/32]
do_invalidatepage+0x1d/0x20
Mar 15 13:02:09 pop kernel: [truncate_complete_page+29/96]
truncate_complete_page+0x1d/0x60
Mar 15 13:02:09 pop kernel: [truncate_inode_pages+135/549]
truncate_inode_pages+0x87/0x225
Mar 15 13:02:09 pop kernel: [vfs_rename_other+208/216]
vfs_rename_other+0xd0/0xd8
Mar 15 13:02:09 pop kernel: [generic_delete_inode+95/285]
generic_delete_inode+0x5f/0x11d
Mar 15 13:02:09 pop kernel: [iput+100/103] iput+0x64/0x67
Mar 15 13:02:09 pop kernel: [dput+395/460] dput+0x18b/0x1cc
Mar 15 13:02:09 pop kernel: [sys_rename+363/454] sys_rename+0x16b/0x1c6
Mar 15 13:02:09 pop kernel: [sys_lstat64+32/39] sys_lstat64+0x20/0x27
Mar 15 13:02:09 pop kernel: [syscall_call+7/11] syscall_call+0x7/0xb
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