lkml.org 
[lkml]   [2020]   [Mar]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 02/37] KVM: nVMX: Validate the EPTP when emulating INVEPT(EXTENT_CONTEXT)
Date
Signal VM-Fail for the single-context variant of INVEPT if the specified
EPTP is invalid. Per the INEVPT pseudocode in Intel's SDM, it's subject
to the standard EPT checks:

If VM entry with the "enable EPT" VM execution control set to 1 would
fail due to the EPTP value then VMfail(Invalid operand to INVEPT/INVVPID);

Fixes: bfd0a56b90005 ("nEPT: Nested INVEPT")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/kvm/vmx/nested.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 8578513907d7..f3774cef4fd4 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -5156,8 +5156,12 @@ static int handle_invept(struct kvm_vcpu *vcpu)
}

switch (type) {
- case VMX_EPT_EXTENT_GLOBAL:
case VMX_EPT_EXTENT_CONTEXT:
+ if (!nested_vmx_check_eptp(vcpu, operand.eptp))
+ return nested_vmx_failValid(vcpu,
+ VMXERR_INVALID_OPERAND_TO_INVEPT_INVVPID);
+ fallthrough;
+ case VMX_EPT_EXTENT_GLOBAL:
/*
* TODO: Sync the necessary shadow EPT roots here, rather than
* at the next emulated VM-entry.
--
2.24.1
\
 
 \ /
  Last update: 2020-03-20 22:34    [W:0.285 / U:21.412 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site