From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Mon, 10 Jul 2023 02:55:25 +0000 (+0900)
Subject: network/neighbor: skip to request neighbors with unmatching link layer address length
X-Git-Tag: v255-rc1~882^2~3
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=bbeceaf2956f6cc12d75d2dc571cfc9fb1d9d839;p=thirdparty%2Fsystemd.git

network/neighbor: skip to request neighbors with unmatching link layer address length
---

diff --git a/src/network/networkd-neighbor.c b/src/network/networkd-neighbor.c
index c1629ae3e9a..aa752caff3b 100644
--- a/src/network/networkd-neighbor.c
+++ b/src/network/networkd-neighbor.c
@@ -256,6 +256,16 @@ static int link_request_neighbor(Link *link, const Neighbor *neighbor) {
         assert(neighbor);
         assert(neighbor->source != NETWORK_CONFIG_SOURCE_FOREIGN);
 
+        if (neighbor->ll_addr.length != link->hw_addr.length) {
+                log_link_debug(link,
+                               "The link layer address lenght (%zu) for neighbor %s does not match with "
+                               "the hardware address length (%zu), ignoring the setting.",
+                               neighbor->ll_addr.length,
+                               IN_ADDR_TO_STRING(neighbor->family, &neighbor->in_addr),
+                               link->hw_addr.length);
+                return 0;
+        }
+
         if (neighbor_get(link, neighbor, &existing) < 0) {
                 _cleanup_(neighbor_freep) Neighbor *tmp = NULL;