In tcp_input(), we acquire a global write lock at first only if a

segment is likely to trigger a TCP state change (i.e., FIN/RST/SYN).
If we later have to upgrade the lock, we acquire an inpcb reference
and drop both global/inpcb locks before reacquiring in-order.  In
that gap, the connection may transition into TIMEWAIT, so we need
to loop back and reevaluate the inpcb after relocking.

MFC after:	3 days
Reported by:	Kamigishi Rei <spambox at haruhiism.net>
Reviewed by:	bz

0 files changed, 0 insertions, 0 deletions