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-rw-r--r--src/vnet/ip/lookup.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/vnet/ip/lookup.c b/src/vnet/ip/lookup.c
index 60cedac57d8..43d61d39ee0 100644
--- a/src/vnet/ip/lookup.c
+++ b/src/vnet/ip/lookup.c
@@ -261,7 +261,12 @@ format_ip_adjacency_packet_data (u8 * s, va_list * args)
u32 adj_index = va_arg (*args, u32);
u8 *packet_data = va_arg (*args, u8 *);
u32 n_packet_data_bytes = va_arg (*args, u32);
- ip_adjacency_t *adj = adj_get (adj_index);
+ ip_adjacency_t *adj;
+
+ if (!adj_is_valid (adj_index))
+ return format (s, "<invalid adjacency>");
+
+ adj = adj_get (adj_index);
switch (adj->lookup_next_index)
{