D30497.id.diff
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D30497.id.diff
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	Index: sys/netinet/tcp_input.c
	===================================================================
	--- sys/netinet/tcp_input.c
	+++ sys/netinet/tcp_input.c
	@@ -3191,7 +3191,12 @@
	* when trimming from the head.
	*/
	tcp_seq temp = save_start;
	- if (tlen) {
	+ if (tlen \|\| (th->th_seq != tp->rcv_nxt)) {
	+ /*
	+ * We add the th_seq != rcv_nxt to
	+ * catch the case of a stand alone out
	+ * of order FIN.
	+ */
	thflags = tcp_reass(tp, th, &temp, &tlen, m);
	tp->t_flags \|= TF_ACKNOW;
	}
	Index: sys/netinet/tcp_stacks/bbr.c
	===================================================================
	--- sys/netinet/tcp_stacks/bbr.c
	+++ sys/netinet/tcp_stacks/bbr.c
	@@ -8320,7 +8320,12 @@
	* trimming from the head.
	*/
	tcp_seq temp = save_start;
	- if (tlen) {
	+ if (tlen \|\| (th->th_seq != tp->rcv_nxt)) {
	+ /*
	+ * We add the th_seq != rcv_nxt to
	+ * catch the case of a stand alone out
	+ * of order FIN.
	+ */
	thflags = tcp_reass(tp, th, &temp, &tlen, m);
	tp->t_flags \|= TF_ACKNOW;
	}
	Index: sys/netinet/tcp_stacks/rack.c
	===================================================================
	--- sys/netinet/tcp_stacks/rack.c
	+++ sys/netinet/tcp_stacks/rack.c
	@@ -10235,7 +10235,12 @@
	* trimming from the head.
	*/
	tcp_seq temp = save_start;
	- if (tlen) {
	+ if (tlen \|\| (th->th_seq != tp->rcv_nxt)) {
	+ /*
	+ * We add the th_seq != rcv_nxt to
	+ * catch the case of a stand alone out
	+ * of order FIN.
	+ */
	thflags = tcp_reass(tp, th, &temp, &tlen, m);
	tp->t_flags \|= TF_ACKNOW;
	}