Fix possible null pointer dereference

Replace clib_warning with vlib_log_warn

Change-Id: I6d0b8d97048b75f4418609264af0c14e19fad79b
Signed-off-by: Juraj Sloboda <jsloboda@cisco.com>

1 files changed, 14 insertions, 3 deletions

diff --git a/src/vnet/ip/rd_cp.c b/src/vnet/ip/rd_cp.c
index 21e45519da1..164b3045775 100644
--- a/src/vnet/ip/rd_cp.c
+++ b/src/vnet/ip/rd_cp.c
@@ -71,6 +71,9 @@ typedef struct
   svm_queue_t *vl_input_queue;
   u32 my_client_index;
 
+  /* logging */
+  vlib_log_class_t log_class;
+
   /* convenience */
   vlib_main_t *vlib_main;
   vnet_main_t *vnet_main;
@@ -210,7 +213,7 @@ get_interface_mac_address (u32 sw_if_index, u8 mac[])
 
   if (!vnet_sw_interface_is_api_valid (rm->vnet_main, sw_if_index))
     {
-      clib_warning ("Invalid sw_if_index");
+      vlib_log_warn (rm->log_class, "Invalid sw_if_index");
       return 1;
     }
 
@@ -218,6 +221,12 @@ get_interface_mac_address (u32 sw_if_index, u8 mac[])
   if (si->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
     eth_if = ethernet_get_interface (&ethernet_main, si->hw_if_index);
 
+  if (!eth_if)
+    {
+      vlib_log_warn (rm->log_class, "Failed to get hardware interface");
+      return 1;
+    }
+
   clib_memcpy (mac, eth_if->address, 6);
 
   return 0;
@@ -316,7 +325,7 @@ ip6_ra_report_handler (void *data)
 
   if (get_interface_mac_address (sw_if_index, mac) != 0)
     {
-      clib_warning ("Error getting MAC address");
+      vlib_log_warn (rm->log_class, "Error getting MAC address");
       return clib_error_return (0, "Error getting MAC address");
     }
 
@@ -501,7 +510,7 @@ set_address_autoconfig (u32 sw_if_index, u8 enable, u8 install_default_routes)
 
   if (!vnet_sw_interface_is_api_valid (vnm, sw_if_index))
     {
-      clib_warning ("Invalid sw_if_index");
+      vlib_log_warn (rm->log_class, "Invalid sw_if_index");
       return 1;
     }
 
@@ -652,6 +661,8 @@ rd_cp_init (vlib_main_t * vm)
   rm->api_main = am;
   rm->node_index = rd_cp_process_node.index;
 
+  rm->log_class = vlib_log_register_class ("rd_cp", 0);
+
 #define _(N,n)                                                  \
     vl_msg_api_set_handlers(VL_API_##N, #n,                     \
                            vl_api_##n##_t_handler,              \