Bug 3286 - NFS exports root filesystem
NFS exports root filesystem
Product: Red Hat Linux
Classification: Retired
Component: knfsd (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: David Lawrence
: Security
Depends On:
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Reported: 1999-06-05 13:19 EDT by jmorris
Modified: 2008-05-01 11:37 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 1999-06-07 19:17:19 EDT
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Description jmorris 1999-06-05 13:19:15 EDT
When mounting a remote CD via NFS, and the CD is not
actually mounted on the server, the mount succeeds with the
server's root filesystem showing up via 'df' on the client.

The remote filesystem did not appear via 'ls', but it is
worrying that the mount succeeded at all (confirmed at in
the server logs).

The exports file contained only the cd directory.

Both systems were running RedHat6, one stock, one with a
manually compiled 2.2.9 kernel.  The problem was also
observed when the roles of the systems were swapped.

If you can't reproduce it, I can provide logs, config files,
terminal dumps etc.
Comment 1 David Lawrence 1999-06-07 19:17:59 EDT
/mnt/cdrom (unless you specified differently during the install) is
located on the root file system. It is an regular directory like any
other. If a client mounts the /mnt/cdrom directory over NFS it will
work fine regardless if anything is actually there. When the client
does a 'df' on their system, the servers root file system stats will
show up because the /mnt/cdrom directory is on the root file system.
This is not a bug therefore.

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