D8272.id21460.diff
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D8272.id21460.diff
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	Index: sys/netinet/tcp_input.c
	===================================================================
	--- sys/netinet/tcp_input.c
	+++ sys/netinet/tcp_input.c
	@@ -3758,7 +3758,15 @@
	(void)sbreserve_locked(&so->so_snd, bufsize, so, NULL);
	}
	SOCKBUF_UNLOCK(&so->so_snd);
	- tp->t_maxseg = mss;
	+ /*
	+ * Sanity check: make sure that maxseg will be large
	+ * enough to allow some data on segments even if the
	+ * all the option space is used (40bytes). Otherwise
	+ * funny things may happen in tcp_output.
	+ *
	+ * XXXGL: shouldn't we reserve space for IP/IPv6 options?
	+ */
	+ tp->t_maxseg = max(mss, 64);

	SOCKBUF_LOCK(&so->so_rcv);
	if ((so->so_rcv.sb_hiwat == V_tcp_recvspace) && metrics.rmx_recvpipe)