Error ioctl: interface.c:302 net_if_mac: Operation not supported when using wifi interface with Unicast MAC

Description

This issue only occurs when using a Unicast MAC address on wireless interface. If you remove the --mac completely, it will execute the xterm just fine.

Steps to Reproduce

firejail --net="wlp3s0" --dns="1.1.1.1" --mac="EA:29:F8:92:B6:7C" xterm

Expected behavior

I expect to be able to use wireless interface wlp3s0 with a random MAC address just as im able to do it on a normal eth0 interface.

Actual behavior

Reading profile /usr/local/etc/firejail/default.profile
Reading profile /usr/local/etc/firejail/disable-common.inc
Reading profile /usr/local/etc/firejail/disable-passwdmgr.inc
Reading profile /usr/local/etc/firejail/disable-programs.inc

** Note: you can use --noprofile to disable default.profile **

Parent pid 3477, child pid 3478
Error ioctl: interface.c:302 net_if_mac: Operation not supported
Error: failed to run /run/firejail/lib/fnet, exiting...
Error: proc 3477 cannot sync with peer: unexpected EOF
Peer 3478 unexpectedly exited with status 1

Behavior without a profile

nothing changed.

Environment

Ubuntu 18.04
Firejail version 0.9.66

Checklist

[x] The issues is caused by firejail (i.e. running the program by path (e.g. /usr/bin/vlc) "fixes" it).
[ ] I can reproduce the issue without custom modifications (e.g. globals.local).
[ ] The program has a profile. (If not, request one in https://github.com/netblue30/firejail/issues/1139)
[ ] The profile (and redirect profile if exists) hasn't already been fixed upstream.
[x] I have performed a short search for similar issues (to avoid opening a duplicate).
- [ ] I'm aware of browser-allow-drm yes/browser-disable-u2f no in firejail.config to allow DRM/U2F in browsers.
[ ] I used --profile=PROFILENAME to set the right profile. (Only relevant for AppImages)

netblue30 / firejail

Error ioctl: interface.c:302 net_if_mac: Operation not supported when using wifi interface with Unicast MAC #4687