stp: port_no counter is off by one

This counter was off by one, because port_num
should be less than STP_MAX_PORTS.

This caused an assert hit later in stp_get_port().

Issue: 13059
Signed-off-by: Ansis Atteka <aatteka@nicira.com>
Reported-by: Ram Jothikumar <rjothikumar@nicira.com>
Acked-by: Ethan Jackson <ethan@nicira.com>

diff --git a/vswitchd/bridge.c b/vswitchd/bridge.c
index bd8e772..1fbbe32 100644 (file)
--- a/vswitchd/bridge.c
+++ b/vswitchd/bridge.c
@@ -937,7 +937,7 @@ port_configure_stp(const struct ofproto *ofproto, struct port *port,
         bitmap_set1(port_num_bitmap, port_idx);
         port_s->port_num = port_idx;
     } else {
-        if (*port_num_counter > STP_MAX_PORTS) {
+        if (*port_num_counter >= STP_MAX_PORTS) {
             VLOG_ERR("port %s: too many STP ports, disabling", port->name);
             port_s->enable = false;
             return;