dhcp6: make sure we have enough space for the DHCP6 option header

poettering · Oct 19, 2018 · 4965374 · 4965374
1 parent 3941f83
commit 4965374
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/libsystemd-network/dhcp6-option.c b/src/libsystemd-network/dhcp6-option.c
@@ -106,7 +106,7 @@ int dhcp6_option_append_ia(uint8_t **buf, size_t *buflen, const DHCP6IA *ia) {
                 return -EINVAL;
         }
 
-        if (*buflen < len)
+        if (*buflen < offsetof(DHCP6Option, data) + len)
                 return -ENOBUFS;
 
         ia_hdr = *buf;