kern/56353: Kernel panic by vrele: negative ref cnt

[Toshiboumi Ohta]

>Number:         56353
>Category:       kern
>Synopsis:       Kernel panic by vrele: negative ref cnt
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Sep 02 18:50:13 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Toshiboumi Ohta
>Release:        FreeBSD 5.1-RELEASE-p2 i386
>Organization:
>Environment:
System: FreeBSD bmdi7250.bmobile.ne.jp 5.1-RELEASE-p2 FreeBSD 5.1-RELEASE-p2 #5: Wed Aug 27 12:34:26 JST 2003 root at bmdi4099.bmobile.ne.jp:/usr/obj/usr/src/sys/ENIGMA i386

 with

device    pcm
options   SC_NO_SUSPEND_VTYSWITCH
#
# OLD CARD
nodevice  cbb
nodevice  pccard
nodevice  cardbus
device    card
device    pcic

 configurations

/boot/device.hint:

hint.apm.0.disabled="0"
hint.acpi.0.disabled="1"

 settings...

>Description:

	   recentry i met few kernel panics, and finally capture actual
	syslog message (i hope) as below.

Sep  2 20:52:37 <daemon.warn> bmdi2227 ppp[3558]: tun0: Warning: ff02:2::/32: Ch
ange route failed: errno: Network is unreachable
Sep  3 03:03:06 <kern.info> enigma syslogd: kernel boot file is /boot/kernel/ker
nel
Sep  3 03:03:06 <kern.crit> enigma kernel: panic: vrele: negative ref cnt
Sep  3 03:03:06 <kern.crit> enigma kernel:
Sep  3 03:03:06 <kern.crit> enigma kernel: syncing disks, buffers remaining... 6
50 650 648 648 648 648 648 648 648 648 648 648 648 648 648 648 648 648 648 648 6
48 648
Sep  3 03:03:06 <kern.crit> enigma kernel: giving up on 505 buffers
Sep  3 03:03:06 <kern.crit> enigma kernel: Uptime: 1d1h52m16s
Sep  3 03:03:06 <kern.crit> enigma kernel: Automatic reboot in 15 seconds - pres
s a key on the console to abort

>How-To-Repeat:

	Unknown

>Fix:

	Unknown


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