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[vpp.git] / src / vnet / ip / ip4_options.c

diff --git a/src/vnet/ip/ip4_options.c b/src/vnet/ip/ip4_options.c
index 9b01151..6ef6b60 100644 (file)
--- a/src/vnet/ip/ip4_options.c
+++ b/src/vnet/ip/ip4_options.c
@@ -77,6 +77,11 @@ VLIB_NODE_FN (ip4_options_node) (vlib_main_t * vm,
          switch (options[0] & 0x7f)
            {
            case IP4_ROUTER_ALERT_OPTION:
+             /*
+              * check the option length
+              */
+             if (options[1] != 4)
+               break;
              /*
               * if it's an IGMP packet, pass up the local stack
               */