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KVM: nVMX: check for required but missing VMCS12 in KVM_SET_NESTED_STATE
authorPaolo Bonzini <pbonzini@redhat.com>
Mon, 27 Jul 2020 13:00:37 +0000 (09:00 -0400)
committerPaolo Bonzini <pbonzini@redhat.com>
Mon, 27 Jul 2020 13:04:49 +0000 (09:04 -0400)
commit0f02bd0ade9a552492463c0159abbe26c4d92b40
treed9caefa4c391d455f3282981673443684a32c1b2tree
parent9319676595a2da8022327119e89c8b13f934835ecommit | diff
KVM: nVMX: check for required but missing VMCS12 in KVM_SET_NESTED_STATE

A missing VMCS12 was not causing -EINVAL (it was just read with
copy_from_user, so it is not a security issue, but it is still
wrong).  Test for VMCS12 validity and reject the nested state
if a VMCS12 is required but not present.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/vmx/nested.c diff | blob | history
arch/x86/kvm/vmx/nested.h diff | blob | history
tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c diff | blob | history
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