On 2021/12/11 01:57, David Matlack wrote:
While testing some patches I ran into a VM_BUG_ON that I have been able to
reproduce at kvm/queue commit 45af1bb99b72 ("KVM: VMX: Clean up PI
pre/post-block WARNs").
To repro run the kvm-unit-tests on a kernel built from kvm/queue with
CONFIG_DEBUG_VM=y. I was testing on an Intel Cascade Lake host and have not
tested in any other environments yet. The repro is not 100% reliable, although
it's fairly easy to trigger and always during a vmx* kvm-unit-tests
Given the details of the crash, commit 15ad9762d69f ("KVM: VMX: Save HOST_CR3
in vmx_prepare_switch_to_guest()") and surrounding commits look most suspect.
Hello, is it producible if this commit is reverted?
Which test in kvm-unit-tests can trigger it?
