From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Thu, 10 Jun 2021 09:16:28 +0000 (+0900)
Subject: netlink: check input name is valid before calling netlink method
X-Git-Tag: v249-rc1~28^2~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57bd6aa7019734f599e23bdd75d6a75629df3aa6;p=thirdparty%2Fsystemd.git

netlink: check input name is valid before calling netlink method
---

diff --git a/src/libsystemd/sd-netlink/netlink-util.c b/src/libsystemd/sd-netlink/netlink-util.c
index 0650f0b4752..4012725f4cd 100644
--- a/src/libsystemd/sd-netlink/netlink-util.c
+++ b/src/libsystemd/sd-netlink/netlink-util.c
@@ -274,6 +274,9 @@ int rtnl_resolve_link_alternative_name(sd_netlink **rtnl, const char *name) {
 
         assert(name);
 
+        if (!ifname_valid_full(name, IFNAME_VALID_ALTERNATIVE))
+                return -EINVAL;
+
         if (!rtnl)
                 rtnl = &our_rtnl;
         if (!*rtnl) {