Mark Johnston 86af1d0241 Ensure that IP fragments do not extend beyond IP_MAXPACKET.
Such fragments are obviously invalid, and when processed may end up
violating the sort order (by offset) of fragments of a given packet.
This doesn't appear to be exploitable, however.

Reviewed by:	emaste
Discussed with:	jtl
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D17914
2018-11-10 03:00:36 +00:00
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