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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2019-07-21 16:01:36 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-07-22 13:55:49 +0200 |
| commit | c6bf2ae931adbd3e10967e12142856439a211813 (patch) | |
| tree | dccbce7d93a788e7b2090dc02fca4f7bd620acc5 /arch/x86/kvm | |
| parent | d9a710e5fc4941944d565b013414e9fdc66242b5 (diff) | |
| download | linux-c6bf2ae931adbd3e10967e12142856439a211813.tar.bz2 | |
KVM: nVMX: Set cached_vmcs12 and cached_shadow_vmcs12 NULL after free
Shall help finding use-after-free bugs earlier.
Suggested-by: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index 4cdab4b4eff1..ced9fba32598 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -234,7 +234,9 @@ static void free_nested(struct kvm_vcpu *vcpu) vmx->vmcs01.shadow_vmcs = NULL; } kfree(vmx->nested.cached_vmcs12); + vmx->nested.cached_vmcs12 = NULL; kfree(vmx->nested.cached_shadow_vmcs12); + vmx->nested.cached_shadow_vmcs12 = NULL; /* Unpin physical memory we referred to in the vmcs02 */ if (vmx->nested.apic_access_page) { kvm_release_page_dirty(vmx->nested.apic_access_page); |