kvm: validate context for kvm cpu get/put operations

Validate that KVM vcpu state is only read/written from cpu thread itself
or that cpu is stopped.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index f73b47b..c9ec72e 100644 (file)
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -949,6 +949,8 @@ int kvm_arch_put_registers(CPUState *env, int level)
 {
     int ret;
 
+    assert(cpu_is_stopped(env) || qemu_cpu_self(env));
+
     ret = kvm_getput_regs(env, 1);
     if (ret < 0)
         return ret;
@@ -991,6 +993,8 @@ int kvm_arch_get_registers(CPUState *env)
 {
     int ret;
 
+    assert(cpu_is_stopped(env) || qemu_cpu_self(env));
+
     ret = kvm_getput_regs(env, 0);
     if (ret < 0)
         return ret;