Re: Current kernel Fatal Trap 12

If you have a version of the kernel in question on disk and with debugging
symbols, could you attach gdb -k to it and send us the results of:

  l *0xc01f6212

That will provide a bit more information about where the panic is
occuring.  This is likely a NULL pointer dereference.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert_at_fledge.watson.org      Network Associates Laboratories

On Fri, 20 Jun 2003, Manfred Antar wrote:

> For the past week i have not been able to boot with current kernel.
> The last kernel that works is from Sat June 14th.
> When I build and try and boot a current kernel I get:
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0x38
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc01f6212
> stack pointer           = 0x10:0xc04b1e24
> frame pointer           = 0x10:0xc04b1e24
> 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         = 0 (swapper)
> trap number             = 12
> panic: page fault
> Uptime: 1s
> 
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0x38
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc01f6212
> stack pointer           = 0x10:0xc04b1cec
> frame pointer           = 0x10:0xc04b1cec
> 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         = 0 (swapper)
> trap number             = 12
> panic: page fault
> Uptime: 1s
> 
> This continues to scroll by many times and I can't get to the debugger.
> The machine is i386 SMP dual pentium-pro overdrive processors.
> Same thing happens with kernel configured as UNIprocessor.
> 
> 
> 
> 
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