From: Avi Kivity <[email protected]>

Under CONFIG_MAXSMP, cpus_hardware_enabled is allocated from the heap and
not statically initialized.  This causes a crash on reboot when kvm thinks
vmx is enabled on random nonexistent cpus and accesses nonexistent percpu
lists.

Fix by explicitly clearing the variable.

Cc: [email protected]
Reported-and-tested-by: Yinghai Lu <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a9f62bb..3dca047 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2603,6 +2603,7 @@ int kvm_init(void *opaque, unsigned int vcpu_size,
                r = -ENOMEM;
                goto out_free_0;
        }
+       cpumask_clear(cpus_hardware_enabled);
 
        r = kvm_arch_hardware_setup();
        if (r < 0)
--
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