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Unverified Commit e5084c47 authored by Ido Yariv's avatar Ido Yariv Committed by Harsh Shandilya
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KVM: x86: fix wbinvd_dirty_mask use-after-free 



commit bd768e146624cbec7122ed15dead8daa137d909d upstream.

vcpu->arch.wbinvd_dirty_mask may still be used after freeing it,
corrupting memory. For example, the following call trace may set a bit
in an already freed cpu mask:
    kvm_arch_vcpu_load
    vcpu_load
    vmx_free_vcpu_nested
    vmx_free_vcpu
    kvm_arch_vcpu_free

Fix this by deferring freeing of wbinvd_dirty_mask.

Signed-off-by: default avatarIdo Yariv <ido@wizery.com>
Reviewed-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarRadim Krčmář <rkrcmar@redhat.com>
Signed-off-by: default avatarWilly Tarreau <w@1wt.eu>
parent 6f9bd302
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