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Kernel Bug in /var/log/syslog



Hello list,

I've been getting some random lockups of late that I suspect are my cpu.
Today I upgraded my kernel from 2.6.7-1-k7 to 2.6.9-2-k7 just to make
sure. Back to the subject line; while working on it today, I got this
ominous message in /var/log/syslog:

Jan 27 15:42:57 jacob kernel: ------------[ cut here ]------------
Jan 27 15:42:57 jacob kernel: kernel BUG at mm/rmap.c:474!
Jan 27 15:42:57 jacob kernel: invalid operand: 0000 [#1]
Jan 27 15:42:57 jacob kernel: PREEMPT 
Jan 27 15:42:57 jacob kernel: Modules linked in: radeon nfsd exportfs
lockd sunr pc appletalk af_packet lp autofs4 thermal fan button
processor ac battery usblp ipv6 amd74xx shpchp pciehp pci_hotplug
nvidia_agp parport_pc parport floppy pcsp kr tsdev mousedev joydev evdev
usbhid ohci_hcd eth1394 ehci_hcd usbcore forcedet h ohci1394 agpgart
dm_mod capability commoncap vfat fat snd_intel8x0 snd_ac97_co dec
gameport snd_mpu401_uart snd_rawmidi snd_seq_oss snd_seq_device
snd_seq_midi_event snd_seq snd_pcm_oss snd_pcm snd_timer snd_page_alloc
snd_mixer_oss snd so undcore sbp2 ieee1394 ide_generic ide_cd ide_core
rtc ext3 jbd mbcache sr_mod cd rom sd_mod sata_sil libata scsi_mod unix
fbcon font vesafb cfbcopyarea cfbimgblt cfbfillrect
Jan 27 15:42:57 jacob kernel: CPU:    0
Jan 27 15:42:57 jacob kernel: EIP:    0060:[page_remove_rmap+41/64]   
Not taint ed VLI
Jan 27 15:42:57 jacob kernel: EFLAGS: 00010286   (2.6.9-2-k7) 
Jan 27 15:42:57 jacob kernel: EIP is at page_remove_rmap+0x29/0x40
Jan 27 15:42:57 jacob kernel: eax: ffffffff   ebx: 00099000   ecx:
c11dbb38   ed x: c11dbb60
Jan 27 15:42:57 jacob kernel: esi: cecf9a40   edi: c11dbb60   ebp:
00100000   es p: d0a2fe88
Jan 27 15:42:57 jacob kernel: ds: 007b   es: 007b   ss: 0068
Jan 27 15:42:57 jacob kernel: Process setup.bin (pid: 6411,
threadinfo=d0a2e000 task=e3995020)
Jan 27 15:42:57 jacob kernel: Stack: c014676c c11dbb60 e44fbb78 e44fbb78
00000ed c 0eddb025 b71f7000 e44fbb70 
Jan 27 15:42:57 jacob kernel:        b6ef7000 00000000 c01468c7 c0382250
e44fbb6 c b6df7000 00100000 00000000 
Jan 27 15:42:57 jacob kernel:        c0382250 b6df7000 e44fbb70 b6ef7000
0000000 0 c014693b c0382250 e44fbb6c 
Jan 27 15:42:57 jacob kernel: Call Trace:
Jan 27 15:42:57 jacob kernel:  [zap_pte_range+300/560]
zap_pte_range+0x12c/0x230 Jan 27 15:42:57 jacob kernel: 
[zap_pmd_range+87/128] zap_pmd_range+0x57/0x80 Jan 27 15:42:57 jacob
kernel:  [unmap_page_range+75/128] unmap_page_range+0x4b/0 x80
Jan 27 15:42:57 jacob kernel:  [unmap_vmas+253/448]
unmap_vmas+0xfd/0x1c0 Jan 27 15:42:57 jacob kernel: 
[unmap_region+123/240] unmap_region+0x7b/0xf0 Jan 27 15:42:57 jacob
kernel:  [do_munmap+301/384] do_munmap+0x12d/0x180 Jan 27 15:42:57 jacob
kernel:  [sys_munmap+80/128] sys_munmap+0x50/0x80 Jan 27 15:42:57 jacob
kernel:  [syscall_call+7/11] syscall_call+0x7/0xb
Jan 27 15:42:57 jacob kernel: Code: 26 00 8b 54 24 04 8b 02 f6 c4 08 75
28 83 42 08 ff 0f 98 c0 84 c0 74 11 8b 42 08 40 78 0d 9c 58 fa ff 0d 10
a4 38 c0 50 9d 9 0 c3 <0f> 0b da 01 f5 ad 2a c0 eb e9 0f 0b d7 01 f5 ad
2a c0 eb ce 8d Jan 27 15:42:57 jacob kernel:  <6>note: setup.bin[6411]
exited with preempt_coun t 1
Jan 27 15:42:57 jacob kernel: bad: scheduling while atomic!
Jan 27 15:42:57 jacob kernel:  [schedule+1231/1248] schedule+0x4cf/0x4e0
Jan 27 15:42:57 jacob kernel:  [do_IRQ+260/304] do_IRQ+0x104/0x130
Jan 27 15:42:57 jacob kernel:  [common_interrupt+24/32]
common_interrupt+0x18/0x 20
Jan 27 15:42:57 jacob kernel:  [rwsem_down_read_failed+141/384]
rwsem_down_read_ failed+0x8d/0x180
Jan 27 15:42:57 jacob kernel:  [.text.lock.futex+7/179]
.text.lock.futex+0x7/0xb 3
Jan 27 15:42:57 jacob kernel:  [do_IRQ+260/304] do_IRQ+0x104/0x130
Jan 27 15:42:57 jacob kernel:  [do_futex+100/160] do_futex+0x64/0xa0
Jan 27 15:42:57 jacob kernel:  [sys_futex+238/256] sys_futex+0xee/0x100
Jan 27 15:42:57 jacob kernel:  [mm_release+152/160] mm_release+0x98/0xa0
Jan 27 15:42:57 jacob kernel:  [do_exit+156/1056] do_exit+0x9c/0x420
Jan 27 15:42:57 jacob kernel:  [do_invalid_op+0/272]
do_invalid_op+0x0/0x110 Jan 27 15:42:57 jacob kernel:  [die+392/400]
die+0x188/0x190 Jan 27 15:42:57 jacob kernel:  [page_remove_rmap+41/64]
page_remove_rmap+0x29/0x 40
Jan 27 15:42:57 jacob kernel:  [fixup_exception+35/160]
fixup_exception+0x23/0xa 0
Jan 27 15:42:57 jacob kernel:  [do_invalid_op+268/272]
do_invalid_op+0x10c/0x110 
Jan 27 15:42:57 jacob kernel: [page_remove_rmap+41/64]
page_remove_rmap+0x29/0x 40
Jan 27 15:42:57 jacob kernel:  [pg0+810515281/1069892608]
journal_stop+0x1a1/0x2 90 [jbd]
Jan 27 15:42:57 jacob kernel:  [pg0+810759096/1069892608]
ext3_mark_iloc_dirty+0 x28/0x40 [ext3]
Jan 27 15:42:57 jacob kernel:  [find_get_page+45/96]
find_get_page+0x2d/0x60 Jan 27 15:42:57 jacob kernel: 
[error_code+45/56] error_code+0x2d/0x38 
Jan 27 15:42:57 jacob kernel: [page_remove_rmap+41/64]
page_remove_rmap+0x29/0x 40
Jan 27 15:42:57 jacob kernel:  [zap_pte_range+300/560]
zap_pte_range+0x12c/0x230 
Jan 27 15:42:57 jacob kernel: [zap_pmd_range+87/128]
zap_pmd_range+0x57/0x80 
Jan 27 15:42:57 jacob kernel: [unmap_page_range+75/128]
unmap_page_range+0x4b/0 x80 
Jan 27 15:42:57 jacob kernel: [unmap_vmas+253/448] unmap_vmas+0xfd/0x1c0
Jan 27 15:42:57 jacob kernel: [unmap_region+123/240]
unmap_region+0x7b/0xf0 
Jan 27 15:42:57 jacob kernel: [do_munmap+301/384] do_munmap+0x12d/0x180
Jan 27 15:42:57 jacob kernel: [sys_munmap+80/128] sys_munmap+0x50/0x80
Jan 27 15:42:57 jacob kernel: [syscall_call+7/11] syscall_call+0x7/0xb 

So, my question would be - is this worth reporting, or is it too likely
it's a side effect from my flaky cpu?

TIA,
Jacob
 



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