diff options
Diffstat (limited to 'src/vnet/dhcp/dhcp4_proxy_node.c')
| -rw-r--r-- | src/vnet/dhcp/dhcp4_proxy_node.c | 13 |
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 d5ddfdc86f2..f72927441ed 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; |