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KVM: VMX: Check for automatic switch msr table overflow
author
Gleb Natapov
<gleb@redhat.com>
Wed, 5 Oct 2011 12:01:24 +0000
(14:01 +0200)
committer
Avi Kivity
<avi@redhat.com>
Thu, 17 Nov 2011 14:28:09 +0000
(16:28 +0200)
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
arch/x86/kvm/vmx.c
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diff --git
a/arch/x86/kvm/vmx.c
b/arch/x86/kvm/vmx.c
index
98f4b0b
..
579a0b5
100644
(file)
--- a/
arch/x86/kvm/vmx.c
+++ b/
arch/x86/kvm/vmx.c
@@
-1280,7
+1280,11
@@
static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
if (m->guest[i].index == msr)
break;
- if (i == m->nr) {
+ if (i == NR_AUTOLOAD_MSRS) {
+ printk_once(KERN_WARNING"Not enough mst switch entries. "
+ "Can't add msr %x\n", msr);
+ return;
+ } else if (i == m->nr) {
++m->nr;
vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);