AuxXxilium/linux_dsm_epyc7002
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Merge branch 'kvm-insert-lfence'

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Topic branch for CVE-2017-5753, avoiding conflicts in the next merge window.
This commit is contained in:
Paolo Bonzini 2018-01-16 16:38:52 +01:00 committed by Radim Krčmář
commit 05992edc27
1 changed files with 10 additions and 2 deletions
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12
arch/x86/kvm/vmx.c
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@ -893,8 +893,16 @@ static inline short vmcs_field_to_offset(unsigned long field)
{
BUILD_BUG_ON(ARRAY_SIZE(vmcs_field_to_offset_table) > SHRT_MAX);
if (field >= ARRAY_SIZE(vmcs_field_to_offset_table) ||
vmcs_field_to_offset_table[field] == 0)
if (field >= ARRAY_SIZE(vmcs_field_to_offset_table))
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 vmcs_field_to_offset_table[field];