kvm: vmx: handle invvpid vm exit gracefully

On systems with invvpid instruction support (corresponding bit in
IA32_VMX_EPT_VPID_CAP MSR is set) guest invocation of invvpid
causes vm exit, which is currently not handled and results in
propagation of unknown exit to userspace.

Fix this by installing an invvpid vm exit handler.

This is CVE-2014-3646.

Cc: stable@vger.kernel.org
Signed-off-by: Petr Matousek <pmatouse@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/include/uapi/asm/vmx.h b/arch/x86/include/uapi/asm/vmx.h
index 0e79420..990a2fe 100644 (file)
--- a/arch/x86/include/uapi/asm/vmx.h
+++ b/arch/x86/include/uapi/asm/vmx.h
@@ -67,6 +67,7 @@
 #define EXIT_REASON_EPT_MISCONFIG       49
 #define EXIT_REASON_INVEPT              50
 #define EXIT_REASON_PREEMPTION_TIMER    52
+#define EXIT_REASON_INVVPID             53
 #define EXIT_REASON_WBINVD              54
 #define EXIT_REASON_XSETBV              55
 #define EXIT_REASON_APIC_WRITE          56
@@ -114,6 +115,7 @@
        { EXIT_REASON_EOI_INDUCED,           "EOI_INDUCED" }, \
        { EXIT_REASON_INVALID_STATE,         "INVALID_STATE" }, \
        { EXIT_REASON_INVD,                  "INVD" }, \
+       { EXIT_REASON_INVVPID,               "INVVPID" }, \
        { EXIT_REASON_INVPCID,               "INVPCID" }
 
 #endif /* _UAPIVMX_H */

diff --cc arch/x86/kvm/vmx.c
Simple merge