Date: Wed, 27 Mar 2002 12:42:51 +0200 From: "Apache Man" <apache@ukr.net> To: "Kip Macy" <kmacy@netapp.com> Cc: hackers@freebsd.org, "Michael Lucas" <mwlucas@blackhelicopters.org> Subject: back trace of vm_object_reference bug Message-ID: <E16qAtH-000Lqc-00@fatlady.ukr.net>
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# gdb -k
GNU gdb 4.18
Copyright 1998 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-unknown-freebsd".
(kgdb) symbol-file /kernel.debug
Reading symbols from /kernel.debug...done.
(kgdb) exec-file kernel.0
(kgdb) core-file vmcore.0
IdlePTD at phsyical address 0x004b1000
initial pcb at physical address 0x003f5ec0
panicstr: privileged instruction fault
panic messages:
---
Fatal trap 1: privileged instruction fault while in kernel mode
instruction pointer = 0x8:0xc6425c44
stack pointer = 0x10:0xc6425c30
frame pointer = 0x10:0xc6425c2c
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 = 113 (cp)
interrupt mask = none
trap number = 1
panic: privileged instruction fault
syncing disks... 112 105 102 101 101 101 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100
giving up on 99 buffers
Uptime: 48s
dumping to dev #ad/0x20019, offset 100272
dump ata1: resetting devices .. done
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
---
#0 dumpsys () at ../../kern/kern_shutdown.c:474
474 if (dumping++) {
(kgdb) bt
#0 dumpsys () at ../../kern/kern_shutdown.c:474
#1 0xc01c1def in boot (howto=256) at ../../kern/kern_shutdown.c:313
#2 0xc01c21d0 in poweroff_wait (junk=0xc03a662c, howto=-1069915709)
at ../../kern/kern_shutdown.c:582
#3 0xc0339d02 in trap_fatal (frame=0xc6425bf0, eva=0)
at ../../i386/i386/trap.c:956
#4 0xc03396df in trap (frame={tf_fs = 671416336, tf_es = 393232,
tf_ds = -968753136, tf_edi = -968692448, tf_esi = -979969472,
tf_ebp = -968729556, tf_isp = -968729572, tf_ebx = 0,
tf_edx = -968740864, tf_ecx = 0, tf_eax = 14, tf_trapno = 1, tf_err = 0,
tf_eip = -968729532, tf_cs = 8, tf_eflags = 66194, tf_esp = -1070728004,
tf_ss = 0}) at ../../i386/i386/trap.c:618
#5 0xc6425c44 in ?? ()
#6 0xc02dfcbc in vm_object_reference (object=
Cannot access memory at address 0x1029a.
) at ../../vm/vm_object.c:256
Cannot access memory at address 0x10292.
(kgdb)
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