Console: compat_ifmu_ulist errors (error 14)
I've seen this mentioned a few times - associated with Malwarebytes, or some VPN software.
In Console you'll get constant repeated streams of errors:
error 18:19:45.620964 +0000 kernel compat_ifmu_ulist: en0 copyin() error 14
error 18:19:45.621002 +0000 kernel compat_ifmu_ulist: en1 copyin() error 14
error 18:19:45.621008 +0000 kernel compat_ifmu_ulist: p2p0 copyin() error 14
error 18:19:45.621011 +0000 kernel compat_ifmu_ulist: en0 copyin() error 14
error 18:19:45.621013 +0000 kernel compat_ifmu_ulist: awdl0 copyin() error 14
error 18:19:45.621019 +0000 kernel compat_ifmu_ulist: en1 copyin() error 14
error 18:19:45.621021 +0000 kernel compat_ifmu_ulist: en2 copyin() error 14
error 18:19:45.621025 +0000 kernel compat_ifmu_ulist: p2p0 copyin() error 14
error 18:19:45.621027 +0000 kernel compat_ifmu_ulist: en3 copyin() error 14
error 18:19:45.621029 +0000 kernel compat_ifmu_ulist: awdl0 copyin() error 14
error 18:19:45.621037 +0000 kernel compat_ifmu_ulist: en2 copyin() error 14
error 18:19:45.622028 +0000 kernel compat_ifmu_ulist: en3 copyin() error 14
error 18:19:45.622904 +0000 kernel compat_ifmu_ulist: en0 copyin() error 14
error 18:19:45.622915 +0000 kernel compat_ifmu_ulist: en1 copyin() error 14
error 18:19:45.623112 +0000 kernel compat_ifmu_ulist: p2p0 copyin() error 14
error 18:19:45.623256 +0000 kernel compat_ifmu_ulist: awdl0 copyin() error 14
error 18:19:45.623308 +0000 kernel compat_ifmu_ulist: en2 copyin() error 14
error 18:19:45.623418 +0000 kernel compat_ifmu_ulist: en3 copyin() error 14
error 18:19:45.623800 +0000 kernel compat_ifmu_ulist: en0 copyin() error 14
error 18:19:45.624012 +0000 kernel compat_ifmu_ulist: en1 copyin() error 14
error 18:19:45.624200 +0000 kernel compat_ifmu_ulist: p2p0 copyin() error 14
error 18:19:45.624423 +0000 kernel compat_ifmu_ulist: awdl0 copyin() error 14
error 18:19:45.624580 +0000 kernel compat_ifmu_ulist: en2 copyin() error 14
error 18:19:45.624590 +0000 kernel compat_ifmu_ulist: en3 copyin() error 14
Annoying, right?
Tracing this looks like the issue is Qt framework.
thread ID: 0x2f31 / 12081
thread name: "Qt bearer thread"
Now, in my case this is coming from Roland Cloud, both the manager app and the RCM Service daemon.
PIA VPN client and MalwareBytes may have been implicated, but I've gone through the dumps from the machine and traced these kernel thread IDs to processes from Roland.
If you want to check what's causing issues like this:
Console error - view details - thread ID.
Activity Monitor - System Diagnostics - open the archive and look at taskinfo.txt, search for the Thread ID and then scroll up to see which process is responsible for that tree (the one with no indentation when viewed in TextEdit). In this case, Qt bearer thread is a child process of Roland Cloud Manager.
Is it a bug, is it a problem? Who knows. Console says error, so I say find out which app is causing it and report the bug to the developer.
iMac 27", macOS 10.14