From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Fri, 1 Oct 2021 08:59:56 +0000 (+0900)
Subject: network: radv: ignore Assign= if prefixlen is larger than 64
X-Git-Tag: v250-rc1~552^2~14
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=fcd7ad52d7ea361ed6b40191328676ee345105f6;p=thirdparty%2Fsystemd.git

network: radv: ignore Assign= if prefixlen is larger than 64
---

diff --git a/src/network/networkd-radv.c b/src/network/networkd-radv.c
index dabd91c0f9a..b9ba0ff9baa 100644
--- a/src/network/networkd-radv.c
+++ b/src/network/networkd-radv.c
@@ -215,6 +215,17 @@ int link_request_radv_addresses(Link *link) {
                 if (r < 0)
                         return r;
 
+                /* generate_eui64_address() below requires the prefix length <= 64. */
+                if (prefixlen > 64) {
+                        _cleanup_free_ char *str = NULL;
+
+                        (void) in6_addr_prefix_to_string(&prefix, prefixlen, &str);
+                        log_link_debug(link,
+                                       "Prefix is longer than 64, refusing to assign an address in %s.",
+                                       strna(str));
+                        continue;
+                }
+
                 r = address_new(&address);
                 if (r < 0)
                         return log_oom();