5.1, Data Corruption, Intel, Oh my! [patch] - Fatal trap 12

[Bosko Milekic]

On Mon, Aug 11, 2003 at 11:12:36AM -0500, Mark Johnston wrote:
...
> Using $PIR table, 14 entries at 0xc00fdeb0
> apm0: <APM BIOS> on motherboard
> kernel trap 12 with interrupts disabled
> 
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0x0
> fault code              = supervisor read, page not present
> instruction pointer     = 0x8:0xc059a773
> stack pointer           = 0x10:0xc0c219e2
> frame pointer           = 0x10:0xc0c21a02
> 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)
> kernel: type 12 trap, code=0
> Stopped at      _mtx_lock_flags+0x43:   cmpl    $0xc07edf8c,0(%ebx)
> db> trace
> _mtx_lock_flags(0,0,c07aa287,11e,c0c21aaa) at _mtx_lock_flags+0x43
> vm_fault(c102f000,c0000000,2,0,c08205c0) at vm_fault+0x2b4
> trap_pfault(c0c21b9e,0,c00004d8,100000,c00004d8) at trap_pfault+0x152
> trap(6c200018,10,1bc40060,1c,0) at trap+0x30d
> calltrap() at calltrap+0x5
> --- trap 0xc, eip = 0x5949, esp = 0xc0c21bde, dbp = 0xc0c21be4 ---
> (null)(1bf80058,0,530e0102,80202,505a61) at 0x5949
> db>
> 
> The old kernel (Friday's CURRENT plus ATAng) still boots and works fine.
> Please ask for any more information you need or any other steps I can
> take.
>
> Mark

  Please try without any other patches but just stock -current.  The
  above fault looks like a NULL pointer dereference somewhere.

  Once you sup to recent _stock_ -current (and no other patches), apply
  the patch and then do a 'find /usr/src/sys/ -name "*.rej" -print' and
  see if any patch hunks were rejected before you build and boot the
  kernel.

  If after all this you still crash like in the above, then please send
  me [off-list] your kernel configuration file as well as a trace (as
  above).

-- 
Bosko Milekic  *  bmilekic at technokratis.com  *  bmilekic at FreeBSD.org
TECHNOkRATIS Consulting Services  *  http://www.technokratis.com/