[riot-notifications] [RIOT-OS/RIOT] Add MUD URL option to DHCPv6 client (#15508)

benpicco notifications at github.com
Sun Nov 29 00:20:33 CET 2020

@benpicco commented on this pull request.

> @@ -254,7 +254,7 @@ static inline size_t _compose_mud_url_opt(dhcpv6_opt_mud_url_t *mud_url_opt,
     mud_url_opt->type = byteorder_htons(DHCPV6_OPT_MUD_URL);
     mud_url_opt->len = byteorder_htons(len);
-    strncpy(mud_url_opt->mudString, mud_url);
+    strncpy(mud_url_opt->mudString, mud_url, len);

`strncpy` must use the size of the *destination* buffer, otherwise it's a rather pointless exercise. 

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