double fault when nullmounting

Matthew Dillon dillon at
Mon Jul 30 15:49:27 PDT 2007

:Matthew Dillon wrote:
:> :server:/pbulk on /pbulk	nfs
:> :/dev/ad6s1b on /pbulk2	ufs
:> :/pbulk2/root on /pbulk/root	null
:> :/pbulk2/clients on /pbulk/clients	null
:cd "$client"
:mount -t null -o ro /pbulk/root root
:mount -t null var root/var
:mount -t null tmp root/tmp
:mount -t null dev root/dev
:mount -t null usr.pkg root/usr/pkg
:mount -t null /pbulk/scratch root/pbulk/scratch
:mount -t null /pbulk/packages root/pbulk/packages
:mount -t null /pbulk/distfiles root/pbulk/distfiles
:mount -t null /pbulk/bulklog root/pbulk/bulklog
:mount -t null -o ro /pbulk/pkgsrc root/usr/pkgsrc
:the /pbulk, /pbulk2, /pbulk/root, /pbulk/clients mounts were done manually before.
:  simon

    Well, so far I haven't been able to crash anything.  I definitely want
    to try to reproduce this.  It isn't what I originally thought it was,
    since there are no deep directory recursions occuring here.  So whatever
    the recursion is which is creating the issue is a software bug causing
    an infinite-recursion somehow.

    How old was the kernel running on the box?


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