Fixes a possible 'use after free' of kvm variable in kvm_vm_ioctl_create_spapr_tce, where it does a mutex_unlock(&kvm->lock) after a kvm_put_kvm(kvm). Signed-off-by: Leonardo Bras <leonardo@xxxxxxxxxxxxx> --- arch/powerpc/kvm/book3s_64_vio.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c index 5834db0a54c6..a402ead833b6 100644 --- a/arch/powerpc/kvm/book3s_64_vio.c +++ b/arch/powerpc/kvm/book3s_64_vio.c @@ -316,14 +316,13 @@ long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm, if (ret >= 0) list_add_rcu(&stt->list, &kvm->arch.spapr_tce_tables); - else - kvm_put_kvm(kvm); mutex_unlock(&kvm->lock); if (ret >= 0) return ret; + kvm_put_kvm(kvm); kfree(stt); fail_acct: account_locked_vm(current->mm, kvmppc_stt_pages(npages), false); -- 2.23.0
