How bad is KVM_EXIT_INTERNAL_ERROR?

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Hello,

I am getting some KVM_EXIT_INTERNAL_ERROR/KVM_INTERNAL_ERROR_EMULATION
while fuzzing KVM. Does it indicate a bug in kvm code?
To make it clear, the context is that guest does all kind of weird
stuff and if it kills itself it is fine. I am just trying to catch bad
effects on the host.
As far as I can tell, if qemu gets KVM_EXIT_INTERNAL_ERROR it will
fail. So for user it will look like qemu misbehaves. E.g. it will not
auto restart the VM.
If KVM_EXIT_INTERNAL_ERROR/KVM_INTERNAL_ERROR_EMULATION is OK, are
other KVM_EXIT_INTERNAL_ERROR error codes worse? Are there any other
indications that host is affected in a bad way? I mean besides BUGs,
WARNINGs and crashes of the host kernel.

Thanks
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