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-rw-r--r--src/vat/ip_types.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/vat/ip_types.c b/src/vat/ip_types.c
index 5041c129245..8edcb133f33 100644
--- a/src/vat/ip_types.c
+++ b/src/vat/ip_types.c
@@ -64,9 +64,12 @@ uword
unformat_ip_prefix (unformat_input_t * input, va_list * args)
{
ip_prefix_t *a = va_arg (*args, ip_prefix_t *);
+ /* %d writes more than a u8 */
+ int plen;
if (unformat (input, "%U/%d", unformat_ip_address, &ip_prefix_addr (a),
- &ip_prefix_len (a)))
+ &plen))
{
+ ip_prefix_len (a) = plen;
if ((ip_prefix_version (a) == AF_IP4 && 32 < ip_prefix_len (a)) ||
(ip_prefix_version (a) == AF_IP6 && 128 < ip_prefix_len (a)))
{