amd64/120956: FreeBSD 6.3 Release: Fatal trap 12: page fault while in kernel mode

[John Baldwin]

The following reply was made to PR amd64/120956; it has been noted by GNATS.

From: John Baldwin <jhb at freebsd.org>
To: freebsd-amd64 at freebsd.org
Cc: Eric Kingston <ericnk at esreco.net>,
 freebsd-gnats-submit at freebsd.org
Subject: Re: amd64/120956: FreeBSD 6.3 Release: Fatal trap 12: page fault while in kernel mode
Date: Mon, 25 Feb 2008 10:21:15 -0500

 On Thursday 21 February 2008 07:18:01 pm Eric Kingston wrote:
 > >Number:         120956
 > >Category:       amd64
 > >Synopsis:       FreeBSD 6.3 Release: Fatal trap 12: page fault while in
 > > kernel mode Confidential:   no
 > >Severity:       critical
 > >Priority:       high
 > >Responsible:    freebsd-amd64
 > >State:          open
 > >Quarter:
 > >Keywords:
 > >Date-Required:
 > >Class:          sw-bug
 > >Submitter-Id:   current-users
 > >Arrival-Date:   Fri Feb 22 00:30:02 UTC 2008
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Eric Kingston
 > >Release:        FreeBSD 6.3 Release
 > >Organization:
 >
 > Standard Industries
 >
 > >Environment:
 >
 > FreeBSD ifabgate.esreco.net 6.3-RELEASE FreeBSD 6.3-RELEASE #0:
 > ..
 > unable to execute a uname command as the kernel trap happens before it
 > fully boots
 >
 > >Description:
 >
 > After installing FreeBSD 6.3 Release amd64 on a Shuttle XPC SD30G2B, intel
 > 945GC + ICH7 chipset, Intel E6400 core 2 duo 2.13 Ghz, 1066 Mhz FSB
 > processor, then rebooting the following error occurs....
 >
 > ..
 > SMP: AP CPU #1 Launched!
 > Trying to mount root from ufs:/dev/ad4s1a
 > kernel trap 12 with interrupts diabled
 >
 > Fatal trap 12: page fault while in kernel mode
 > cpuid = 1; apic id = 01
 > fault virtual address	= 0x58
 > fault code		= supervisor read data, page not present
 > instruction pointer	= 0x8:0xffffffff804639ba
 > stack pointer		= 0x10:0xffffffff94c9d4c0
 > frame pointer		= 0x10:0x0
 > code segment		= base 0x0, limit 0xfffff, type 0x1b
 > 			= DPL 0, pres 1, def32 1, gran 1
 > processor eflags	= interrupt enabled, resume, IOPL = 0
 > current process		= 1 (swapper)
 > trap number		= 12
 > panic: page fault
 > cpuid = 1
 >
 > The system doesn't even finish booting.
 >
 > I might also add that I installed FreeBSD 6.2 amd64 on this system and
 > everything worked flawlessly, no problems at all.
 
 Can you add DDB to your kernel and get a stack trace from DDB when it panics?
 
 -- 
 John Baldwin