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KVM: PPC: Book3S PR: Free shared page if mmu initialization fails

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commit cb10bf9194f4d2c5d830eddca861f7ca0fecdbb4 upstream.

Explicitly free the shared page if kvmppc_mmu_init() fails during
kvmppc_core_vcpu_create(), as the page is freed only in
kvmppc_core_vcpu_free(), which is not reached via kvm_vcpu_uninit().

Fixes: 96bc451a15 ("KVM: PPC: Introduce shared page")
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>
This commit is contained in:
Sean Christopherson 2019-12-18 13:54:47 -08:00 • committed by Greg Kroah-Hartman
commit 9213699efd
1 changed files with 3 additions and 1 deletions
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4
arch/powerpc/kvm/book3s_pr.c
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@ -1769,10 +1769,12 @@ static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm,
err = kvmppc_mmu_init(vcpu);
if (err < 0)
goto uninit_vcpu;
goto free_shared_page;
return vcpu;
free_shared_page:
free_page((unsigned long)vcpu->arch.shared);
uninit_vcpu:
kvm_vcpu_uninit(vcpu);
free_shadow_vcpu: