Fatal trap 12: page fault while in kernel mode
Joseph Koshy
joseph.koshy at gmail.com
Fri Dec 5 17:04:04 UTC 2008
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
> fault virtual address = 0x0
> fault code = supervisor read, page not present
> instruction pointer = 0x20:0xc0a57285
> Why this occurs and what do I have to check?
The trap is being caused by a null pointer access.
You may want to take a full dump and use kgdb(1) to investigate the matter:
ddb> call doadump
ddb> reset
and after the reboot finishes,
# kgdb /boot/kernel/kernel /var/crash/vmcore.N
where "vmcore.N" is the name of the dump file saved by savecore(8).
Koshy
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