[nfsv4] Stephen Farrell's No Objection on draft-ietf-nfsv4-lfs-registry-04: (with COMMENT)

["Stephen Farrell" <[e-mail]>]

Stephen Farrell has entered the following ballot position for
draft-ietf-nfsv4-lfs-registry-04: No Objection

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COMMENT:
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I think there is a possibly missing security consideration in
section 4 - if two label formats "overlap" so that a value for
one could represent a (different) value for the other and if
the label format specifier is not somehow bound to the
packet/object, then some confusion attacks may be possible.
The mitigation I think is to either (maybe implicitly) bind
the format specifier into the object/label or to ensure that
label values cannot be valid for other label format
specifiers. (Note that attacks here are probably only
interesting in highly specific cases, so it's not a huge deal,
but maybe worth a mention.)