Make sure we have the entire option before printing it.

diff --git a/print-dhcp6.c b/print-dhcp6.c
index 16f82542013f11d3858a3b006ba44cdc011c120d..78b82ee3ed783ea02de7aeae3913dcb3238ca6b4 100644 (file)
--- a/print-dhcp6.c
+++ b/print-dhcp6.c
@@ -304,6 +304,7 @@ dhcp6opt_print(netdissect_options *ndo,
                        goto trunc;
                opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
                ND_PRINT((ndo, " (%s", tok2str(dh6opt_str, "opt_%u", opttype)));
+               ND_TCHECK2(*(cp + sizeof(*dh6o)), optlen);
                switch (opttype) {
                case DH6OPT_CLIENTID:
                case DH6OPT_SERVERID: