[PATCH 02/45] KVM: PPC: Book3S PR: Free shared page if mmu initialization fails

Sean Christopherson
2019-10-22T01:58:42Z

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@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
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:
--
2.22.0