Fatal Trap 12 in various processes always at address 0x3030313a

[Marat N.Afanasyev]

Richard Mahlerwein wrote:
> (Sorry, update to subject to be <something>)
> 
> 3 weeks ago:
> I upgraded from 7.1-PRELEASE to -stable and all seemed fine
> until I rebooted out of single user mode after doing make
> installworld and mergemaster.  At that point, near the
> end of the boot sequence I got a core dump, apparently
> triggered by devd.
> 
> ****
> Fatal trap 12: page fault while in kernel mode.
> cpu id = 0; apic id = 00
> fault virtual address = 0x3030313a
> fault code = supervisor write, page not present
> [snip]
> current process = 355 (devd)
> ****
> 
> I redid the *whole* process in single user mode, yet no
> difference.  I was out of town for 2.5 weeks after
> that, then busy for a few days, which brings me to now:
> 
> TODAY:
> I booted to my memtest86+ CD, let it run through which it
> did with no issues noted.
> I blew away my /usr/src and resynced as of about noon
> today.  After following through all steps to rebuild, I
> now get a fatal trap 12...
> 
> ****
> Fatal trap 12: page fault while in kernel mode.
> cpu id = 0; apic id = 00
> fault virtual address = 0x3030313a
> fault code = supervisor write, page not present
> [snip]
> current process = 352 (sysctl)
> ****
> 
> Same virtual address, different process.  Umm. 
> Interesting.
> 
> I'm at a loss.  Google's been of little help, and
> searching these lists hasn't turned up much either. 
> 
> Does anyone have a further recommendation on what to do,
> try, test or change?
> 
> BTW, I'm GENERIC.  
> 
> Rich Mahlerwein
> 
> 
> 
>       
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> 
such trap could be triggered by 'floating' memory/cache error. and i 
think that you should try to suspect memory first. memtest helps to 
diagnose most of memory problems, but not all.

-- 
SY, Marat
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