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kern/44657: rmdir of cwd in tmpfs causes kassert in lookup

>Number:         44657
>Category:       kern
>Synopsis:       rmdir of cwd in tmpfs causes kassert in lookup
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Mar 01 15:20:00 +0000 2011
>Originator:     Taylor R Campbell <>
>Release:        NetBSD 5.99.47
System: NetBSD oberon.local 5.99.47 NetBSD 5.99.47 (RIAMONODEBUG) #31: Mon Feb 
28 05:14:15 UTC 2011 
Architecture: i386
Machine: i386

        If my cwd is in a tmpfs, and I rmdir the cwd, then `cd ..'
        triggers the KASSERT(0) in tmpfs_alloc_vp.


        % rump_tmpfs -s10m ~/tmp
        % cd ~/tmp
        % mkdir -p lose/foo
        % cd lose/foo
        % rm -r ~/tmp/lose
        % cd ..
        panic: kernel diagnostic assertion "0" failed: file 
 line 404
        rump kernel halting...
        cd: device not configured: ..


        Not sure yet.

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