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Message-Id: <199810230508.WAA21246@hub.freebsd.org>
Date: Thu, 22 Oct 1998 22:08:36 -0700 (PDT)
From: N/A@FreeBSD.ORG
To: freebsd-gnats-submit@FreeBSD.ORG
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Subject: kern/8420: __getcwd() from an (forcibly) unmounted fs panics.
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>Number:         8420
>Category:       kern
>Synopsis:       __getcwd() from an (forcibly) unmounted fs panics.
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Oct 22 22:10:00 PDT 1998
>Last-Modified:
>Originator:     Juha Nurmela
>Organization:
N/A
>Release:        3.0-19980831-SNAP
>Environment:
FreeBSD pena 3.0-19980831-SNAP
FreeBSD 3.0-19980831-SNAP #25:
Thu Oct 22 14:43:39 EEST 1998
junki@pena:/usr/src/sys/compile/PENA  i386
>Description:
Optimization to "pwd" causes a reference to bad current directory,
in kern/vfs_syscalls.c:__getcwd(), when filesystem has been
taken away by force (when changing CD's with simple scripts, for example).

>How-To-Repeat:
mount /cdrom
cd /cdrom/foo

umount -f /cdrom    # typically from another terminal, wm menu etc.

pwd                 # any command that does getcwd(3)
>Fix:
Workaround: sysctl -w debug.disablecwd=1
Probable fix: another loop termination clause to __getcwd() ?

>Audit-Trail:
>Unformatted:

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