On Mon, 21 Oct 2019 18:58:42 -0700
Sean Christopherson <sean.j.christopherson@xxxxxxxxx> wrote:
> 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: 96bc451a15329 ("KVM: PPC: Introduce shared page")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
> ---
Reviewed-by: Greg Kurz <groug@xxxxxxxx>
> arch/powerpc/kvm/book3s_pr.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
> index cc65af8fe6f7..3f6ad3f58628 100644
> --- a/arch/powerpc/kvm/book3s_pr.c
> +++ b/arch/powerpc/kvm/book3s_pr.c
> @@ -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:
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