ovs_stats: fix potential NULL dereference

ovs_stats_new_port() accepts a character pointer, uuid, as a parameter,
and copies it into port->uuid. Later, this value is dereferenced in
ovs_stats_update_bridge(). If uuid was NULL, then a SEGV will occur.

Resolve this issue by checking if uuid is NULL in ovs_stats_new_port().

Fixes: 481984e ("ovs_stats: Implement OVS statistics plugin.")
Signed-off-by: Mark Kavanagh <mark.b.kavanagh@intel.com>

diff --git a/src/ovs_stats.c b/src/ovs_stats.c
index e027845..358d10e 100644 (file)
--- a/src/ovs_stats.c
+++ b/src/ovs_stats.c
@@ -244,6 +244,9 @@ static port_list_t *ovs_stats_get_port_by_name(const char *name) {
 /* Create or get port by port uuid */
 static port_list_t *ovs_stats_new_port(bridge_list_t *bridge,
                                        const char *uuid) {
+  if (uuid == NULL)
+    return NULL;
+
   port_list_t *port = ovs_stats_get_port(uuid);
 
   if (port == NULL) {