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([2001:b07:add:ec09:c399:bc87:7b6c:fb2a]) by smtp.googlemail.com with ESMTPSA id be8-20020a0564021a2800b0045c3f6ad4c7sm5974668edb.62.2022.11.02.11.01.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 02 Nov 2022 11:01:03 -0700 (PDT) Message-ID: Date: Wed, 2 Nov 2022 19:01:02 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.4.0 Subject: Re: [PATCH AUTOSEL 5.19 03/10] kvm: x86: Do proper cleanup if kvm_x86_ops->vm_init() fails Content-Language: en-US To: Sasha Levin , linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Junaid Shahid , Sean Christopherson , tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, kvm@vger.kernel.org References: <20221014135222.2109334-1-sashal@kernel.org> <20221014135222.2109334-3-sashal@kernel.org> From: Paolo Bonzini In-Reply-To: <20221014135222.2109334-3-sashal@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/14/22 15:52, Sasha Levin wrote: > From: Junaid Shahid > > [ Upstream commit b24ede22538b4d984cbe20532bbcb303692e7f52 ] > > If vm_init() fails [which can happen, for instance, if a memory > allocation fails during avic_vm_init()], we need to cleanup some > state in order to avoid resource leaks. > > Signed-off-by: Junaid Shahid > Link: https://lore.kernel.org/r/20220729224329.323378-1-junaids@google.com > Signed-off-by: Sean Christopherson > Signed-off-by: Sasha Levin > --- > arch/x86/kvm/x86.c | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c > index 8c2815151864..8d2211b22ff3 100644 > --- a/arch/x86/kvm/x86.c > +++ b/arch/x86/kvm/x86.c > @@ -11842,6 +11842,10 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) > if (ret) > goto out_page_track; > > + ret = static_call(kvm_x86_vm_init)(kvm); > + if (ret) > + goto out_uninit_mmu; > + > INIT_HLIST_HEAD(&kvm->arch.mask_notifier_list); > INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); > atomic_set(&kvm->arch.noncoherent_dma_count, 0); > @@ -11877,8 +11881,10 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) > kvm_hv_init_vm(kvm); > kvm_xen_init_vm(kvm); > > - return static_call(kvm_x86_vm_init)(kvm); > + return 0; > > +out_uninit_mmu: > + kvm_mmu_uninit_vm(kvm); > out_page_track: > kvm_page_track_cleanup(kvm); > out: Acked-by: Paolo Bonzini