D37117.diff
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	diff --git a/usr.sbin/bhyve/rfb.c b/usr.sbin/bhyve/rfb.c
	--- a/usr.sbin/bhyve/rfb.c
	+++ b/usr.sbin/bhyve/rfb.c
	@@ -885,9 +885,12 @@

	/* 1b. Read client version */
	len = stream_read(cfd, buf, VERSION_LENGTH);
	- if (len == VERSION_LENGTH && !strncmp(vbuf, buf, VERSION_LENGTH - 2)) {
	- client_ver = buf[VERSION_LENGTH - 2];
	+ if (len != VERSION_LENGTH \|\|
	+ strncmp(vbuf, buf, VERSION_LENGTH - 2) != 0) {
	+ goto done;
	}
	+
	+ client_ver = buf[VERSION_LENGTH - 2];
	if (client_ver != CVERS_3_8 && client_ver != CVERS_3_7) {
	/* only recognize 3.3, 3.7 & 3.8. Others dflt to 3.3 */
	client_ver = CVERS_3_3;