KVM: PPC: Book3S HV: Uninit vCPU if vcore creation fails

commit 1a978d9d3e72ddfa40ac60d26301b154247ee0bc upstream.

Call kvm_vcpu_uninit() if vcore creation fails to avoid leaking any
resources allocated by kvm_vcpu_init(), i.e. the vcpu->run page.

Fixes: 371fefd6f2dc4 ("KVM: PPC: Allow book3s_hv guests to use SMT processor modes")
Cc: stable@vger.kernel.org
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index e840f94..5cf1392 100644 (file)
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1766,7 +1766,7 @@ static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm,
        mutex_unlock(&kvm->lock);
 
        if (!vcore)
-               goto free_vcpu;
+               goto uninit_vcpu;
 
        spin_lock(&vcore->lock);
        ++vcore->num_threads;
@@ -1782,6 +1782,8 @@ static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm,
 
        return vcpu;
 
+uninit_vcpu:
+       kvm_vcpu_uninit(vcpu);
 free_vcpu:
        kmem_cache_free(kvm_vcpu_cache, vcpu);
 out: