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Date: Fri, 28 Mar 2014 10:32:10 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Jan Kiszka <jan.kiszka@...mens.com>, Marcelo Tosatti <mtosatti@...hat.com>, Josh Boyer <jwboyer@...oraproject.org> Subject: [PATCH 3.10 18/22] KVM: VMX: fix use after free of vmx->loaded_vmcs 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Marcelo Tosatti <mtosatti@...hat.com> commit 26a865f4aa8e66a6d94958de7656f7f1b03c6c56 upstream. After free_loaded_vmcs executes, the "loaded_vmcs" structure is kfreed, and now vmx->loaded_vmcs points to a kfreed area. Subsequent free_loaded_vmcs then attempts to manipulate vmx->loaded_vmcs. Switch the order to avoid the problem. https://bugzilla.redhat.com/show_bug.cgi?id=1047892 Reviewed-by: Jan Kiszka <jan.kiszka@...mens.com> Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com> Cc: Josh Boyer <jwboyer@...oraproject.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- arch/x86/kvm/vmx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7133,8 +7133,8 @@ static void vmx_free_vcpu(struct kvm_vcp struct vcpu_vmx *vmx = to_vmx(vcpu); free_vpid(vmx); - free_nested(vmx); free_loaded_vmcs(vmx->loaded_vmcs); + free_nested(vmx); kfree(vmx->guest_msrs); kvm_vcpu_uninit(vcpu); kmem_cache_free(kvm_vcpu_cache, vmx); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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