Index: sys/netinet/cc/cc_cubic.c
===================================================================
--- sys/netinet/cc/cc_cubic.c
+++ sys/netinet/cc/cc_cubic.c
@@ -264,8 +264,10 @@
 cubic_cong_signal(struct cc_var *ccv, uint32_t type)
 {
 	struct cubic *cubic_data;
+	u_int mss;
 
 	cubic_data = ccv->cc_data;
+	mss = tcp_maxseg(ccv->ccvc.tcp);
 
 	switch (type) {
 	case CC_NDUPACK:
@@ -292,6 +294,10 @@
 		break;
 
 	case CC_RTO:
+		CCV(ccv, snd_ssthresh) = max(min(CCV(ccv, snd_wnd),
+						 CCV(ccv, snd_cwnd)) / 2 / mss,
+					     2) * mss;
+		CCV(ccv, snd_cwnd) = mss;
 		/*
 		 * Grab the current time and record it so we know when the
 		 * most recent congestion event was. Only record it when the
Index: sys/netinet/cc/cc_dctcp.c
===================================================================
--- sys/netinet/cc/cc_dctcp.c
+++ sys/netinet/cc/cc_dctcp.c
@@ -235,7 +235,7 @@
 	if (CCV(ccv, t_flags2) & TF2_ECN_PERMIT) {
 		dctcp_data = ccv->cc_data;
 		cwin = CCV(ccv, snd_cwnd);
-		mss = CCV(ccv, t_maxseg);
+		mss = tcp_maxseg(ccv->ccvc.tcp);
 
 		switch (type) {
 		case CC_NDUPACK:
@@ -282,6 +282,10 @@
 			dctcp_data->ece_curr = 1;
 			break;
 		case CC_RTO:
+			CCV(ccv, snd_ssthresh) = max(min(CCV(ccv, snd_wnd),
+							 CCV(ccv, snd_cwnd)) / 2 / mss,
+						     2) * mss;
+			CCV(ccv, snd_cwnd) = mss;
 			dctcp_update_alpha(ccv);
 			dctcp_data->save_sndnxt += CCV(ccv, t_maxseg);
 			dctcp_data->num_cong_events++;
Index: sys/netinet/cc/cc_htcp.c
===================================================================
--- sys/netinet/cc/cc_htcp.c
+++ sys/netinet/cc/cc_htcp.c
@@ -271,8 +271,10 @@
 htcp_cong_signal(struct cc_var *ccv, uint32_t type)
 {
 	struct htcp *htcp_data;
+	u_int mss;
 
 	htcp_data = ccv->cc_data;
+	mss = tcp_maxseg(ccv->ccvc.tcp);
 
 	switch (type) {
 	case CC_NDUPACK:
@@ -311,6 +313,10 @@
 		break;
 
 	case CC_RTO:
+		CCV(ccv, snd_ssthresh) = max(min(CCV(ccv, snd_wnd),
+						 CCV(ccv, snd_cwnd)) / 2 / mss,
+					     2) * mss;
+		CCV(ccv, snd_cwnd) = mss;
 		/*
 		 * Grab the current time and record it so we know when the
 		 * most recent congestion event was. Only record it when the
Index: sys/netinet/cc/cc_newreno.c
===================================================================
--- sys/netinet/cc/cc_newreno.c
+++ sys/netinet/cc/cc_newreno.c
@@ -237,7 +237,7 @@
 	u_int mss;
 
 	cwin = CCV(ccv, snd_cwnd);
-	mss = CCV(ccv, t_maxseg);
+	mss = tcp_maxseg(ccv->ccvc.tcp);
 	nreno = ccv->cc_data;
 	beta = (nreno == NULL) ? V_newreno_beta : nreno->beta;
 	beta_ecn = (nreno == NULL) ? V_newreno_beta_ecn : nreno->beta_ecn;
@@ -275,6 +275,12 @@
 			ENTER_CONGRECOVERY(CCV(ccv, t_flags));
 		}
 		break;
+	case CC_RTO:
+		CCV(ccv, snd_ssthresh) = max(min(CCV(ccv, snd_wnd),
+						 CCV(ccv, snd_cwnd)) / 2 / mss,
+					     2) * mss;
+		CCV(ccv, snd_cwnd) = mss;
+		break;
 	}
 }
 
Index: sys/netinet/tcp_input.c
===================================================================
--- sys/netinet/tcp_input.c
+++ sys/netinet/tcp_input.c
@@ -429,8 +429,6 @@
 void inline
 cc_cong_signal(struct tcpcb *tp, struct tcphdr *th, uint32_t type)
 {
-	u_int maxseg;
-
 	INP_WLOCK_ASSERT(tp->t_inpcb);
 
 #ifdef STATS
@@ -460,13 +458,9 @@
 		}
 		break;
 	case CC_RTO:
-		maxseg = tcp_maxseg(tp);
 		tp->t_dupacks = 0;
 		tp->t_bytes_acked = 0;
 		EXIT_RECOVERY(tp->t_flags);
-		tp->snd_ssthresh = max(2, min(tp->snd_wnd, tp->snd_cwnd) / 2 /
-		    maxseg) * maxseg;
-		tp->snd_cwnd = maxseg;
 		if (tp->t_flags2 & TF2_ECN_PERMIT)
 			tp->t_flags2 |= TF2_ECN_SND_CWR;
 		break;