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Date: Tue, 23 Jul 1996 09:27:16 GMT
From: James Raynard <james@jraynard.demon.co.uk>
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Subject: kern/1420: panic vrele: negative reference count
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>Number:         1420
>Category:       kern
>Synopsis:       panic vrele: negative reference count
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jul 23 08:50:01 PDT 1996
>Last-Modified:
>Originator:     James Raynard
>Organization:
James Raynard, Edinburgh, Scotland
>Release:        FreeBSD 2.2-CURRENT i386
>Environment:

FreeBSD-current with all the latest VM code.

>Description:

System quiescent, CDROM mounted but not accessed for several hours.  
On attempting to unmount it, got

cd0(ahc0:2:0): MEDIUM ERROR info:8c asc:2,0 No seek complete

followed very shortly by

panic vrele: negative reference count
_vrele(f0b55100, f02bfa00, f0b6b200, f0b04900) at _vrele + 0x23
_end(f0b2fa00, f0b6b200, f0b2fa00, f0bc0700) at 0xf4f04f4e
_dounmount(f0b2fa00, f0b6b200, f01a4ec0, f0b6b200) at _dounmount + 0x90
_unmount(f0b6b200, efbfff94, efbfff84, 0, 282a6) at _unmount + 0x94

>How-To-Repeat:
>Fix:

Dunno, sorry.

>Audit-Trail:
>Unformatted: