Lawrence Stewart a26fef3a21 Plug a TCP reassembly UMA zone leak introduced in r226113 by only using the
backup stack queue entry when the zone is exhausted, otherwise we leak a zone
allocation each time we plug a hole in the reassembly queue.

Reported by:	many on freebsd-stable@ (thread: "TCP Reassembly Issues")
Tested by:	many on freebsd-stable@ (thread: "TCP Reassembly Issues")
Reviewed by:	bz (very brief sanity check)
MFC after:	3 days
2011-11-27 02:32:08 +00:00
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