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KVM: PPC: e500: Fix some NULL dereferences on error 

There are some error paths in kvmppc_core_vcpu_create_e500() where we
forget to set the error code.  It means that we return ERR_PTR(0) which
is NULL and it results in a NULL pointer dereference in the caller.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Dan Carpenter 2017-07-13 10:38:29 +03:00 committed by Paul Mackerras
parent 712b12d724
commit 73e77c0982
1 changed files with 6 additions and 2 deletions
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8
arch/powerpc/kvm/e500.c
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@ -455,16 +455,20 @@ static struct kvm_vcpu *kvmppc_core_vcpu_create_e500(struct kvm *kvm,
if (err)
goto free_vcpu;
if (kvmppc_e500_id_table_alloc(vcpu_e500) == NULL)
if (kvmppc_e500_id_table_alloc(vcpu_e500) == NULL) {
err = -ENOMEM;
goto uninit_vcpu;
}
err = kvmppc_e500_tlb_init(vcpu_e500);
if (err)
goto uninit_id;
vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
if (!vcpu->arch.shared)
if (!vcpu->arch.shared) {
err = -ENOMEM;
goto uninit_tlb;
}
return vcpu;