freebsd stable - Jan 2007 - 6.2-prerelease from 8 jan crash

uname -a :
FreeBSD xxx 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #21: Mon Jan 8 14:37:57 CET
2007

kgdb backtrace :

Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 06
fault virtual address   = 0x104
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc06efa29
stack pointer           = 0x28:0xe538cc60
frame pointer           = 0x28:0xe538cc74
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 5 (thread taskq)
trap number             = 12
panic: page fault
cpuid = 1
Uptime: 8d10h42m51s
Dumping 2047 MB (2 chunks)
  chunk 0: 1MB (159 pages) ... ok
  chunk 1: 2047MB (523968 pages) 2031 2015 1999 1983 1967 1951 1935 1919
1903 1887 1871 1855 1839 1823 1807 1791 1775 1759 1743 1727 1711 1695
1679 1663 1647 1631 1615 1599 1583 1567 1551 1535 1519 1503 1487 1471
1455 1439 1423 1407 1391 1375 1359 1343 1327 1311 1295 1279 1263 1247
1231 1215 1199 1183 1167 1151 1135 1119 1103 1087 1071 1055 1039 1023
1007 991 975 959 943 927 911 895 879 863 847 831 815 799 783 767 751 735
719 703 687 671 655 639 623 607 591 575 559 543 527 511 495 479 463 447
431 415 399 383 367 351 335 319 303 287 271 255 239 223 207 191 175 159
143 127 111 95 79 63 47 31 15

#0  doadump () at pcpu.h:165
165     pcpu.h: No such file or directory.
        in pcpu.h
(kgdb) bt
#0  doadump () at pcpu.h:165
#1  0xc06fa662 in boot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:409
#2  0xc06faa13 in panic (fmt=0xc0996d81 "%s") at
/usr/src/sys/kern/kern_shutdown.c:565
#3  0xc0936c1d in trap_fatal (frame=0xe538cc20, eva=0) at
/usr/src/sys/i386/i386/trap.c:837
#4  0xc09362bd in trap (frame      {tf_fs = 8, tf_es = -964755416, tf_ds =
-449314776, tf_edi -964734208, tf_esi = 4, tf_ebp = -449262476, tf_isp =
-449262516, tf_ebx
= -848968900, tf_edx = 6, tf_ecx = -964734208, tf_eax = 1, tf_trapno 12, tf_err
= 0, tf_eip = -1066468823, tf_cs = 32, tf_eflags = 65538,
tf_esp = -848968900, tf_ss = -933423232}) at
/usr/src/sys/i386/i386/trap.c:270
#5  0xc092004a in calltrap () at /usr/src/sys/i386/i386/exception.s:139
#6  0xc06efa29 in _mtx_lock_sleep (m=0xcd65c33c, tid=3330233088, opts=0,
file=0x0, line=0) at /usr/src/sys/kern/kern_mutex.c:546
#7  0xc074cfd4 in unp_gc (arg=0x0, pending=2) at
/usr/src/sys/kern/uipc_usrreq.c:1714
#8  0xc07209d1 in taskqueue_run (queue=0xc6848200) at
/usr/src/sys/kern/subr_taskqueue.c:257
#9  0xc0721000 in taskqueue_thread_loop (arg=0x1) at
/usr/src/sys/kern/subr_taskqueue.c:376
#10 0xc06df223 in fork_exit (callout=0xc0720f40 <taskqueue_thread_loop>,
arg=0x1, frame=0x1) at /usr/src/sys/kern/kern_fork.c:821
#11 0xc09200ac in fork_trampoline () at
/usr/src/sys/i386/i386/exception.s:208

Any idea what happened ?

C?dric

> Date: Sun, 21 Jan 2007 11:02:20 +0100
> From: Cedric Tabary <tabary@efrei.fr>
> Sender: owner-freebsd-stable@freebsd.org
> 
> 
> uname -a :
> FreeBSD xxx 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #21: Mon Jan 8 14:37:57
CET 2007
> 
> kgdb backtrace :
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; apic id = 06
> fault virtual address   = 0x104
> fault code              = supervisor read, page not present
> instruction pointer     = 0x20:0xc06efa29
> stack pointer           = 0x28:0xe538cc60
> frame pointer           = 0x28:0xe538cc74
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> processor eflags        = resume, IOPL = 0
> current process         = 5 (thread taskq)
> trap number             = 12
> panic: page fault
> cpuid = 1
John Baldwin committed a fix to -stable a week or two ago that fixed
this for me. It was MFCed on Jan. 12, so you don't have it.

Patches to:
/sys/kern/kern_descrip.c
/sys/kern/uipc_syscalls.c
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman@es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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