Merge pull request FRRouting#16279 from FRRouting/mergify/bp/stable/1…

…0.0/pr-16211

bgpd: Check if we have really enough data before doing memcpy for software version (backport FRRouting#16211)

bgpd/bgp_packet.c

@@ -3557,7 +3557,7 @@ static void bgp_dynamic_capability_software_version(uint8_t *pnt, int action,
 	char soft_version[BGP_MAX_SOFT_VERSION + 1] = {};
 
 	if (action == CAPABILITY_ACTION_SET) {
-		if (data + len > end) {
+		if (data + len + 1 > end) {
 			zlog_err("%pBP: Received invalid Software Version capability length %d",
 				 peer, len);
 			return;