D36864.diff
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D36864.diff
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	diff --git a/sys/netinet/tcp_timewait.c b/sys/netinet/tcp_timewait.c
	--- a/sys/netinet/tcp_timewait.c
	+++ b/sys/netinet/tcp_timewait.c
	@@ -464,13 +464,13 @@
	* are above the previous ones.
	* Allow UDP port number changes in this case.
	*/
	- if ((thflags & TH_SYN) && SEQ_GT(th->th_seq, tw->rcv_nxt)) {
	+ if (((thflags & (TH_SYN \| TH_ACK)) == TH_SYN) &&
	+ SEQ_GT(th->th_seq, tw->rcv_nxt)) {
	/*
	* In case we can't upgrade our lock just pretend we have
	* lost this packet.
	*/
	- if (((thflags & (TH_SYN \| TH_ACK)) == TH_SYN) &&
	- INP_TRY_UPGRADE(inp) == 0)
	+ if (INP_TRY_UPGRADE(inp) == 0)
	goto drop;
	tcp_twclose(tw, 0);
	TCPSTAT_INC(tcps_tw_recycles);