pimd: Be more careful looking up mroute statistics

When we get a request to look up the mroute statistics
from the kernel, ensure that the interface returned
is a valid usable interface.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

diff --git a/pimd/pim_zlookup.c b/pimd/pim_zlookup.c
index cdaf04566da15602d1967825ff261c6287adb40b..53fd0ce071ce776c349d89401e2736eb6c378960 100644 (file)
--- a/pimd/pim_zlookup.c
+++ b/pimd/pim_zlookup.c
@@ -456,6 +456,9 @@ pim_zlookup_sg_statistics (struct channel_oil *c_oil)
       zlog_debug ("Sending Request for New Channel Oil Information(%s)", pim_str_sg_dump (&more));
     }
 
+  if (!ifp)
+    return -1;
+
   stream_reset (s);
   zclient_create_header (s, ZEBRA_IPMR_ROUTE_STATS, VRF_DEFAULT);
   stream_put_in_addr (s, &c_oil->oil.mfcc_origin);