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Lucas Holt
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on 14 Nov 20
pf: limit ioctl to a reasonable and tuneable number of elements
pf ioctls frequently take a variable number of elements as argument.
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pf: limit ioctl to a reasonable and tuneable number of elements

pf ioctls frequently take a variable number of elements as argument.

This can potentially allow users to request very large allocations.

These will fail, but even a failing M_NOWAIT might tie up resources

and result in concurrent M_WAITOK allocations entering vm_wait and

inducing reclamation of caches.

Limit these ioctls to what should be a reasonable value, but allow

users to tune it should they need to.

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