lib, zebra: Ensure that the ifp->node exists

On removal, ensure that the ifp->node is set to a null
pointer so that FRR does not use data after freed.
In addition ensure that the ifp->node exists before
attempting to free it.

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

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/if.c b/lib/if.c
index 08d891874..6f567861d 100644
--- a/lib/if.c
+++ b/lib/if.c
@@ -1028,6 +1028,7 @@ void if_terminate(struct vrf *vrf)
 		if (ifp->node) {
 			ifp->node->info = NULL;
 			route_unlock_node(ifp->node);
+			ifp->node = NULL;
 		}
 		if_delete(&ifp);
 	}