* Re: [PATCH 1/3] KVM: x86: hyper-v: don't crash on KVM_GET_SUPPORTED_HV_CPUID when kvm_intel.nested is disabled
[not found] ` <20190827160404.14098-2-vkuznets@redhat.com>
@ 2019-08-27 18:52 ` Radim Krčmář
0 siblings, 0 replies; only message in thread
From: Radim Krčmář @ 2019-08-27 18:52 UTC (permalink / raw)
To: Vitaly Kuznetsov
Cc: kvm, linux-kernel, Paolo Bonzini, Joerg Roedel, Jim Mattson,
Sean Christopherson, Roman Kagan, stable
2019-08-27 18:04+0200, Vitaly Kuznetsov:
> If kvm_intel is loaded with nested=0 parameter an attempt to perform
> KVM_GET_SUPPORTED_HV_CPUID results in OOPS as nested_get_evmcs_version hook
> in kvm_x86_ops is NULL (we assign it in nested_vmx_hardware_setup() and
> this only happens in case nested is enabled).
>
> Check that kvm_x86_ops->nested_get_evmcs_version is not NULL before
> calling it. With this, we can remove the stub from svm as it is no
> longer needed.
>
Added
Cc: <stable@vger.kernel.org>
> Fixes: e2e871ab2f02 ("x86/kvm/hyper-v: Introduce nested_get_evmcs_version() helper")
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
and applied, thanks.
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