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diff --git a/sys/netlink/route/iface_drivers.c b/sys/netlink/route/iface_drivers.c
--- a/sys/netlink/route/iface_drivers.c
+++ b/sys/netlink/route/iface_drivers.c
@@ -93,7 +93,12 @@
if (lattrs->ifla_mtu > 0) {
if (nlp_has_priv(npt->nlp, PRIV_NET_SETIFMTU)) {
struct ifreq ifr = { .ifr_mtu = lattrs->ifla_mtu };
- error = ifhwioctl(SIOCSIFMTU, ifp, (char *)&ifr, curthread);
+ error = ifhwioctl(SIOCSIFMTU, ifp, (char *)&ifr,
+ curthread);
+ if (error != 0) {
+ nlmsg_report_err_msg(npt, "Failed to set mtu");
+ return (error);
+ }
} else {
nlmsg_report_err_msg(npt, "Not enough privileges to set mtu");
return (EPERM);

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