diff options
| author | Avi Kivity <avi@redhat.com> | 2012-06-07 17:08:48 +0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-07-09 14:19:01 +0300 |
| commit | b8405c184b4ef3abcebc5cf2211215944d6e2acc (patch) | |
| tree | 13c52fe08f9f14e425bd8202a2f2e1d135196731 | |
| parent | f0495f9b9992f80f82b14306946444b287193390 (diff) | |
KVM: VMX: Limit iterations with emulator_invalid_guest_state
Otherwise, if the guest ends up looping, we never exit the srcu critical
section, which causes synchronize_srcu() to hang.
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 82ab1fb2683e..debac4984347 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4977,11 +4977,12 @@ static int handle_invalid_guest_state(struct kvm_vcpu *vcpu) int ret = 1; u32 cpu_exec_ctrl; bool intr_window_requested; + unsigned count = 130; cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL); intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING; - while (!guest_state_valid(vcpu)) { + while (!guest_state_valid(vcpu) && count-- != 0) { if (intr_window_requested && (kvm_get_rflags(&vmx->vcpu) & X86_EFLAGS_IF)) return handle_interrupt_window(&vmx->vcpu); |