panic: page fault

Kris Kennaway kris at obsecurity.org
Mon Nov 15 03:22:33 GMT 2004


On Sun, Nov 14, 2004 at 10:12:49PM -0500, kalin mintchev wrote:
> > On Sun, Nov 14, 2004 at 09:04:32PM -0500, kalin mintchev wrote:
> >> ok...  about every 6 - 7 days the machine reboots because of this:
> >>
> >>  /kernel: Fatal trap 12: page fault while in kernel mode
> >>  /kernel: fault virtual address    = 0xbeff2
> >>  /kernel: fault code               = supervisor read, page not present
> >>  /kernel: instruction pointer      = 0x8:0xc0305ed3
> >>  /kernel: stack pointer            = 0x10:0xd7ec9e18
> >>  /kernel: frame pointer            = 0x10:0xd7ec9e20
> >>  /kernel: code segment             = base 0x0, limit 0xfffff, type 0x1b
> >>  /kernel: = DPL 0, pres 1, def32 1, gran 1
> >>  /kernel: processor eflags = interrupt enabled, resume, IOPL = 0
> >>  /kernel: current process          = 29374 (perl)
> >>  /kernel: interrupt mask           = net tty bio cam
> >>  /kernel: trap number              = 12
> >>  /kernel: panic: page fault
> >>
> >> where do i look?
> >>
> >> thanks..........
> >
> > You forgot to mention what version of FreeBSD you're running..if it's
> > old, upgrade to the latest version, because bugs are located and fixed
> > all the time.
> 
> thank you Kris. you are right. sorry. FreeBSD4.6-RELEASE
> 
> well..  i'm pretty sure the problem is caused by the courier imap server.
> it wasn't doing it before i installed qmail and courier.
> the courier starts executing a command called 'ulimit'
> the original script uses the -v flag to the command to assign virtual
> memory. the thing is this bsd version ulimit doesn't support _any_ flags.
> when i was starting it with the flag i was getting error message that the
> flag is not supported and the machine was crashing after a while with a
> message about virtual memory problems. so i took the flag out...  now it
> crashes with this panic...

Follow my advice then..

Kris
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