]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commitdiff
KVM: nVMX: Clear pending KVM_REQ_GET_VMCS12_PAGES when leaving nested
authorJan Kiszka <jan.kiszka@siemens.com>
Sun, 21 Jul 2019 11:52:18 +0000 (13:52 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Mon, 22 Jul 2019 11:55:46 +0000 (13:55 +0200)
Letting this pend may cause nested_get_vmcs12_pages to run against an
invalid state, corrupting the effective vmcs of L1.

This was triggerable in QEMU after a guest corruption in L2, followed by
a L1 reset.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Cc: stable@vger.kernel.org
Fixes: 7f7f1ba33cf2 ("KVM: x86: do not load vmcs12 pages while still in SMM")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/vmx/nested.c

index 0f1378789bd0381e95c703ad658376efa3484d8d..4cdab4b4eff1e8e42d457d8c40831c4dbd75bedf 100644 (file)
@@ -220,6 +220,8 @@ static void free_nested(struct kvm_vcpu *vcpu)
        if (!vmx->nested.vmxon && !vmx->nested.smm.vmxon)
                return;
 
+       kvm_clear_request(KVM_REQ_GET_VMCS12_PAGES, vcpu);
+
        vmx->nested.vmxon = false;
        vmx->nested.smm.vmxon = false;
        free_vpid(vmx->nested.vpid02);