Use crhold() instead of crdup().  The md(4) driver doesn't modify the ucred that it uses, so it merely needs to bump its refcount to make it immutable rather than obtain its own copy.
Use crhold() instead of crdup().  The md(4) driver doesn't modify the ucred
that it uses, so it merely needs to bump its refcount to make it immutable
rather than obtain its own copy.

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