Date: Sun, 14 Jul 2002 19:49:57 +0200 From: Szilveszter Adam <sziszi@bsd.hu> To: freebsd-current@freebsd.org Subject: Interesting panic very early in the boot Message-ID: <20020714174957.GA1244@fonix.adamsfamily.xx>
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Hello everybody,
I have recently finished to upgrade my system to today morning's
-CURRENT, with sources just *before* the commit of rev 1.154 to
src/sys/kern/kern_fork.c by Julian.
I have an UP IA32 machine, I am not using any additional kernel modules,
and now, upon rebooting with the new kernel, as soon as I allow to
continue from the loader prompt, the kernel greets me with this:
(No serial console, transcribed by hand, please excuse any typos)
Fatal trap 12: page fault within kernel mode
fault virtual address = 0xbff004c0
fault code = supervisor read, protection violation
instruction pointer = 0x8:0xc035c348
stack pointer = 0x10:0xc0532c08
frame pointer = 0x10:0xc0532c10
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 ()
kernel: type 12 trap, code=0
Stopped at 0xc035c348: cmpl $0,0xbfc00000(%eax)
Unfortunately, there is preciously little I could extract from ddb after
this.
ddb> ps
pid proc addr uid ppid pgrp flag stat wmesg wchan cmd
0 c03f00c0 c0530000 0 0 0 000000 New
ddb> tr
(null)(c0418920,c0800000,537000,c0532d48,c03595bd) at 0xc035c348
(null)(537000,0,c0532c9c,c0532ce8,10) at 0xc035c290
(null)(537000,c0352524,f,0,8) at 0xc03595bd
(null)(537000) at 0xc0359fb9
(null)() at 0xc0130c7d
An attempt to "show locks" resulted in:
witness_list: witness_cold
Fatal trap 3 breakpoint instruction fault while in kernel mode
An attempt to "show witness" resulted in:
witness_display: witness_cold
Uptime 1s
and a complete lockup, only a power-cycle helped.
No dump was taken.
Does this ring a bell with anyone? I know that the trace may not help
much...
I will be just too glad to offer any information or testing that may be
needed.
--
Regards:
Szilveszter ADAM
Szombathely Hungary
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