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-rw-r--r--vnet/vnet/interface.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/vnet/vnet/interface.c b/vnet/vnet/interface.c
index 941ab170b49..37951c71ed4 100644
--- a/vnet/vnet/interface.c
+++ b/vnet/vnet/interface.c
@@ -1272,8 +1272,11 @@ vnet_hw_interface_change_mac_address_helper (vnet_main_t * vnm,
ethernet_interface_t *ei =
pool_elt_at_index (em->interfaces, hi->hw_instance);
- clib_memcpy (hi->hw_address, (u8 *) & mac_address,
- sizeof (hi->hw_address));
+ vec_validate (hi->hw_address,
+ STRUCT_SIZE_OF (ethernet_header_t, src_address) - 1);
+ clib_memcpy (hi->hw_address, &mac_address,
+ vec_len (hi->hw_address));
+
clib_memcpy (ei->address, (u8 *) & mac_address,
sizeof (ei->address));
ethernet_arp_change_mac (vnm, hw_if_index);