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KVM: VMX: Check for automatic switch msr table overflow 

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Gleb Natapov 2011-10-05 14:01:24 +02:00 committed by Avi Kivity
parent d7cd97964b
commit e7fc6f93b4
1 changed files with 5 additions and 1 deletions
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6
arch/x86/kvm/vmx.c
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@ -1280,7 +1280,11 @@ static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
if (m->guest[i].index == msr) if (m->guest[i].index == msr)
break; 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; ++m->nr;
vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr); vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr); vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);