amd64/159930: kernel core

[Wouter Snels]

>Number:         159930
>Category:       amd64
>Synopsis:       kernel core
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Aug 19 23:00:25 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Wouter Snels
>Release:        FreeBSD 8.2
>Organization:
>Environment:
FreeBSD spark.ofloo.net 8.2-RELEASE-p2 FreeBSD 8.2-RELEASE-p2 #0: Wed Jul 13 15:20:57 CEST 2011     ofloo at spark.ofloo.net:/usr/obj/usr/src/sys/OFL  amd64

>Description:
Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 02
fault virtual address   = 0x30
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff805dd943
stack pointer           = 0x28:0xffffff8091e3d6c0
frame pointer           = 0x28:0xffffff8091e3d6f0
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 18 (softdepflush)
trap number             = 12
panic: page fault
cpuid = 2
KDB: stack backtrace:
#0 0xffffffff8063300e at kdb_backtrace+0x5e
#1 0xffffffff80602627 at panic+0x187
#2 0xffffffff808fbbe0 at trap_fatal+0x290
#3 0xffffffff808fbfbf at trap_pfault+0x28f
#4 0xffffffff808fc49f at trap+0x3df
#5 0xffffffff808e4644 at calltrap+0x8
#6 0xffffffff805f668a at priv_check_cred+0x3a
#7 0xffffffff8084ebd0 at chkdq+0x310
#8 0xffffffff8082db5d at ffs_truncate+0xfed
#9 0xffffffff8084ac5c at ufs_inactive+0x21c
#10 0xffffffff8068a761 at vinactive+0x71
#11 0xffffffff806904b8 at vputx+0x2d8
#12 0xffffffff80836386 at handle_workitem_remove+0x206
#13 0xffffffff8083675e at process_worklist_item+0x20e
#14 0xffffffff80838893 at softdep_process_worklist+0xe3
#15 0xffffffff80839d3c at softdep_flush+0x17c
#16 0xffffffff805d9f28 at fork_exit+0x118
#17 0xffffffff808e4b0e at fork_trampoline+0xe
Uptime: 2d4h7m56s
Cannot dump. Device not defined or unavailable.
Automatic reboot in 15 seconds - press a key on the console to abort
panic: bufwrite: buffer is not busy???
cpuid = 2
Rebooting...

>How-To-Repeat:

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: