Fatal trap 12

[Chris Readle]

Got another one this morning.  This time the only thing running was the
make index && make readmes, and XFree86.

Actually, they both may have finished by then, I started them up then had
to go to sleep, so I'm not entirely sure how far along it got in the
process.  I do know it was past the index and working on the readmes,
though.

/var/log/messages:
Oct 16 01:26:37 creadle /kernel: Fatal trap 12: page fault while in kernel
mode
Oct 16 01:26:37 creadle /kernel: fault virtual address  = 0xfffffd9b
Oct 16 01:26:37 creadle /kernel: fault code             = supervisor read,
page not present
Oct 16 01:26:37 creadle /kernel: instruction pointer    = 0x8:0xc022c1c8
Oct 16 01:26:37 creadle /kernel: stack pointer          = 0x10:0xd2e2ee4c
Oct 16 01:26:37 creadle /kernel: frame pointer          = 0x10:0xd2e2ee54
Oct 16 01:26:37 creadle /kernel: code segment           = base 0x0, limit
0xfffff, type 0x1b
Oct 16 01:26:37 creadle /kernel: = DPL 0, pres 1, def32 1, gran 1
Oct 16 01:26:37 creadle /kernel: processor eflags       = interrupt
enabled, resume, IOPL = 0
Oct 16 01:26:37 creadle /kernel: current process                = 53504
(sh)
Oct 16 01:26:37 creadle /kernel: interrupt mask         = none
Oct 16 01:26:37 creadle /kernel: trap number            = 12
Oct 16 01:26:37 creadle /kernel: panic: page fault
Oct 16 01:26:37 creadle /kernel:

nm -n:
[chris at creadle chris]$ nm -n /kernel | grep c022c1c8
[chris at creadle chris]$ nm -n /kernel | grep c022c1c
[chris at creadle chris]$ nm -n /kernel | grep c022c1
c022c19c T vm_page_lookup
c022c1f8 T vm_page_rename

chris

--- Chris Readle <patterner at rocketmail.com> wrote:
> Hi all,
> 
> New to FBSD, and in the process of moving my Linux/Windows PC to
> FBSD/Windows.
> 
> I got two spontaneous reboots last night (the first times it happened)
> and
> I got fatal trap 12s in /var/log/messages each time.  I wasn't doing
> anything too heavy, just a make index && make readmes on my ports,
> listening to some music through XMMS and browsing the web via Mozilla.
> 
> I searched the archives and the FAQ.  I haven't built a debugging kernel
> yet, but I thought I would post the info I have in the hopes that
> someone
> might be able to help.
> 
> I did do an nm - n on the kernel, however.
> 
> uname -a:
> FreeBSD creadle.oc.cox.net 4.8-RELEASE-p13 FreeBSD 4.8-RELEASE-p13 #4:
> Wed
> Oct 15 08:55:21 PDT 2003    
> chris at creadle.oc.cox.net:/usr/obj/usr/src/sys/CREADLE  i386
> 
> /var/log/messages:
> Oct 14 21:45:23 creadle /kernel: Fatal trap 12: page fault while in
> kernel
> mode
> Oct 14 21:45:23 creadle /kernel: fault virtual address  = 0xbfca02c8
> Oct 14 21:45:23 creadle /kernel: fault code             = supervisor
> read,
> page not present
> Oct 14 21:45:23 creadle /kernel: instruction pointer    = 0x8:0xc028fe83
> Oct 14 21:45:23 creadle /kernel: stack pointer          =
> 0x10:0xd2cfbcf8
> Oct 14 21:45:23 creadle /kernel: frame pointer          =
> 0x10:0xd2cfbd08
> Oct 14 21:45:23 creadle /kernel: code segment           = base 0x0,
> limit
> 0xfffff, type 0x1b
> Oct 14 21:45:23 creadle /kernel: = DPL 0, pres 1, def32 1, gran 1
> Oct 14 21:45:23 creadle /kernel: processor eflags       = interrupt
> enabled, resume, IOPL = 0
> Oct 14 21:45:23 creadle /kernel: current process                = 73961
> (sh)
> Oct 14 21:45:23 creadle /kernel: interrupt mask         = net tty bio
> cam
> Oct 14 21:45:23 creadle /kernel: trap number            = 12
> Oct 14 21:45:23 creadle /kernel: panic: page fault
> 
> nm -n:
> creadle# nm -n /kernel | grep c028fe8
> c028fe88 T pmap_ts_referenced
> creadle# nm -n /kernel | grep c028fe
> c028fe7c T pmap_phys_address
> c028fe88 T pmap_ts_referenced
> 
> I did two because I thought it was odd that the first one came up with a
> higher address than the actual pointer.
> 
> Any good suggestions?
> 
> chris
> 
> 
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