The mac_addr variable was not zero-initialized, causing weird side effects
when the memory contents were a valid MAC address.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Link: https://github.com/openwrt/openwrt/pull/21504
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
(cherry picked from commit 19b8d391a9)