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Commit 2aad9b3e authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

Merge branch 'kvm-insert-lfence' into kvm-master 

Topic branch for CVE-2017-5753, avoiding conflicts in the next merge window.
parents bd89525a 75f139aa

arch/x86/kvm/vmx.c

+10 −2
Original line number Original line Diff line number Diff line
@@ -899,8 +899,16 @@ static inline short vmcs_field_to_offset(unsigned long field) 
{

{

	BUILD_BUG_ON(ARRAY_SIZE(vmcs_field_to_offset_table) > SHRT_MAX);

	BUILD_BUG_ON(ARRAY_SIZE(vmcs_field_to_offset_table) > SHRT_MAX);





	if (field >= ARRAY_SIZE(vmcs_field_to_offset_table) ||

	if (field >= ARRAY_SIZE(vmcs_field_to_offset_table))

	    vmcs_field_to_offset_table[field] == 0)

		return -ENOENT;



	/*

	 * FIXME: Mitigation for CVE-2017-5753.  To be replaced with a

	 * generic mechanism.

	 */

	asm("lfence");



	if (vmcs_field_to_offset_table[field] == 0)

		return -ENOENT;

		return -ENOENT;





	return vmcs_field_to_offset_table[field];

	return vmcs_field_to_offset_table[field];