From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Tue, 16 May 2023 02:46:11 +0000 (+0900)
Subject: udev/net: verify ID_NET_XYZ before trying to assign it as an alternative name
X-Git-Tag: v254-rc1~463^2~4
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e65c6c1baa8ea905f7e5bad3b8486d509775ec6a;p=thirdparty%2Fsystemd.git

udev/net: verify ID_NET_XYZ before trying to assign it as an alternative name
---

diff --git a/src/udev/net/link-config.c b/src/udev/net/link-config.c
index 4c83eede7aa..e5f1220928c 100644
--- a/src/udev/net/link-config.c
+++ b/src/udev/net/link-config.c
@@ -836,7 +836,7 @@ static int link_apply_alternative_names(Link *link, sd_netlink **rtnl) {
                         default:
                                 assert_not_reached();
                         }
-                        if (!isempty(n)) {
+                        if (ifname_valid_full(n, IFNAME_VALID_ALTERNATIVE)) {
                                 r = strv_extend(&altnames, n);
                                 if (r < 0)
                                         return log_oom();