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diff --git a/sys/netinet/tcp_output.c b/sys/netinet/tcp_output.c
--- a/sys/netinet/tcp_output.c
+++ b/sys/netinet/tcp_output.c
@@ -330,6 +330,7 @@
__func__, off));
sack_rxmit = 1;
sendalot = 1;
+ len = min(len, 4 * tp->t_maxseg)
TCPSTAT_INC(tcps_sack_rexmits);
TCPSTAT_ADD(tcps_sack_rexmit_bytes,
min(len, tcp_maxseg(tp)));
@@ -554,11 +555,14 @@
ipoptlen += ipsec_optlen;
#endif
- if ((tp->t_flags & TF_TSO) && V_tcp_do_tso && len > tp->t_maxseg &&
+ if ((len > tp->t_maxseg) &&
+ (tp->t_flags & TF_TSO) &&
+ V_tcp_do_tso &&
(tp->t_port == 0) &&
- ((tp->t_flags & TF_SIGNATURE) == 0) &&
- tp->rcv_numsacks == 0 && sack_rxmit == 0 &&
- ipoptlen == 0 && !(flags & TH_SYN))
+ !(tp->t_flags & TF_SIGNATURE) &&
+ (tp->rcv_numsacks == 0) &&
+ (ipoptlen == 0) &&
+ !(flags & TH_SYN))
tso = 1;
if (sack_rxmit) {

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