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-rw-r--r--src/vnet/ipsec/esp_encrypt.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c
index 186e122793d..6170603ded1 100644
--- a/src/vnet/ipsec/esp_encrypt.c
+++ b/src/vnet/ipsec/esp_encrypt.c
@@ -114,7 +114,11 @@ esp_add_footer_and_icv (vlib_buffer_t * b, u8 block_size, u8 icv_sz,
}
if (pad_bytes)
- clib_memcpy_fast ((u8 *) f - pad_bytes, pad_data, pad_bytes);
+ {
+ ASSERT (pad_bytes <= ESP_MAX_BLOCK_SIZE);
+ pad_bytes = clib_min (ESP_MAX_BLOCK_SIZE, pad_bytes);
+ clib_memcpy_fast ((u8 *) f - pad_bytes, pad_data, pad_bytes);
+ }
f->pad_length = pad_bytes;
b->current_length = new_length + icv_sz;