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-rw-r--r--src/vnet/dhcp/dhcp4_proxy_node.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/src/vnet/dhcp/dhcp4_proxy_node.c b/src/vnet/dhcp/dhcp4_proxy_node.c
index a331b17e07e..d0def3f740d 100644
--- a/src/vnet/dhcp/dhcp4_proxy_node.c
+++ b/src/vnet/dhcp/dhcp4_proxy_node.c
@@ -181,7 +181,14 @@ dhcp_proxy_to_server_input (vlib_main_t * vm,
goto do_trace;
}
- space_left = vlib_buffer_chain_linearize (vm, b0);
+ if (!vlib_buffer_chain_linearize (vm, b0))
+ {
+ error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG;
+ next0 = DHCP_PROXY_TO_SERVER_INPUT_NEXT_DROP;
+ pkts_too_big++;
+ goto do_trace;
+ }
+ space_left = vlib_buffer_space_left_at_end (vm, b0);
/* cant parse chains...
* and we need some space for option 82*/
if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 ||
@@ -530,8 +537,8 @@ dhcp_proxy_to_client_input (vlib_main_t * vm,
if (1 /* dpm->insert_option_82 */ )
{
/* linearize needed to "unclone" and scan options */
- int space_left = vlib_buffer_chain_linearize (vm, b0);
- if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 || space_left < 0)
+ int rv = vlib_buffer_chain_linearize (vm, b0);
+ if ((b0->flags & VLIB_BUFFER_NEXT_PRESENT) != 0 || !rv)
{
error0 = DHCP_PROXY_ERROR_PKT_TOO_BIG;
goto drop_packet;