Never mind - I figured it out. Adding "selinux=0" to the kernel options let it boot. I reinstalled the package for selinux-policy-targeted and now it boots normally - if the audio configuration is set right.
Now to figure out why it won't boot when the audio configuration in VirtualBox is set for PulseAudio. If I set it for ALSA, then it works. But it worked with PulseAudio for years, and other Linux VMs on the same host work with PulseAudio.
That is not a question for this group. I will pose it on the VirtualBox forums. In fact, I DID post it, two years ago, but never received any kind of answer. The VM in that case was on the same host but has now gone away for unrelated reasons.
--
Bill Gee
On Thursday, December 5, 2019 1:40:28 PM CST Bill Gee wrote:
> This is annoying! I have a CentOS7 virtual machine running on VirtualBox. Short version: At boot the system locks with a message:
>
> "Failed to load SELinux policy, freezing."
>
> VirtualBox thinks it is still running, and I can see it consuming a small amount of CPU time. But it never goes past this message.
>
> The problem actually started with a problem in the sound system on this virtual machine. It would boot a ways through, then abort with no warning and no message. It just went away. Looking at the VirtualBox log file, I saw that the last line in the file was something about failing to initialize a stream associated with PulseAudio. In VirtualBox settings for the machine I disabled all audio. It then booted.
>
> I was in the process of gathering information for a problem report at VB when it started giving the message about SELinux policy. There were several aborts including one where it almost got to loading the X server and going graphical.
>
> SELinux is disabled on the computer, so I don't understand why it is even trying to load a policy.
>
> Is there a kernel parameter I can give it to stop SELinux? Is there any other way to get past this message?
>
>
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