network: ndisc: ignore route prefix to ::/0

Fixes #21912.
2021-12-28 21:00:49 +00:00
parent 69b5c7cf2a
commit 80bfc3b901
1 changed files with 5 additions and 0 deletions
@@ -612,6 +612,11 @@ static int ndisc_router_process_route(Link *link, sd_ndisc_router *rt) {
        if (r < 0)
                return log_link_error_errno(link, r, "Failed to get route prefix length: %m");

+        if (in6_addr_is_null(&dst) && prefixlen == 0) {
+                log_link_debug(link, "Route prefix is ::/0, ignoring");
+                return 0;
+        }
+
        if (in6_prefix_is_filtered(&dst, prefixlen, link->network->ndisc_allow_listed_route_prefix, link->network->ndisc_deny_listed_route_prefix)) {
                if (DEBUG_LOGGING) {
                        _cleanup_free_ char *buf = NULL;