Robert Watson 1e8f5ffa35 In tcp_ctloutput(), don't hold the inpcb lock over sooptcopyin(), rather,
drop the lock and then re-acquire it, revalidating TCP connection state
assumptions when we do so.  This avoids a potential lock order reversal
(and potential deadlock, although none have been reported) due to the
inpcb lock being held over a page fault.

MFC after:	1 week
PR:		102752
Reviewed by:	bz
Reported by:	Václav Haisman <v dot haisman at sh dot cvut dot cz>
2008-01-18 12:19:50 +00:00
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