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| author | Jan Kiszka <jan.kiszka@siemens.com> | 2013-03-19 12:36:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-05 10:16:37 -0700 |
| commit | d104388ff9bdb5ec76d5337cd94f9ed4bbf73fbc (patch) | |
| tree | 47ad30d1ce265c83ce110118f2cf57d013b5d5b8 | |
| parent | 8c7028941242372574880e513207abdbe486c3e5 (diff) | |
| download | lwn-d104388ff9bdb5ec76d5337cd94f9ed4bbf73fbc.tar.gz lwn-d104388ff9bdb5ec76d5337cd94f9ed4bbf73fbc.zip | |
KVM: Clean up error handling during VCPU creation
commit d780592b99d7d8a5ff905f6bacca519d4a342c76 upstream.
So far kvm_arch_vcpu_setup is responsible for freeing the vcpu struct if
it fails. Move this confusing resonsibility back into the hands of
kvm_vm_ioctl_create_vcpu. Only kvm_arch_vcpu_setup of x86 is affected,
all other archs cannot fail.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/kvm/x86.c | 5 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 11 |
2 files changed, 6 insertions, 10 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index fbb093601b5a..681eab7ce0dc 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6116,12 +6116,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) if (r == 0) r = kvm_mmu_setup(vcpu); vcpu_put(vcpu); - if (r < 0) - goto free_vcpu; - return 0; -free_vcpu: - kvm_x86_ops->vcpu_free(vcpu); return r; } diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 6b39ba9540e8..5841d06d4aae 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1616,18 +1616,18 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) r = kvm_arch_vcpu_setup(vcpu); if (r) - return r; + goto vcpu_destroy; mutex_lock(&kvm->lock); if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { r = -EINVAL; - goto vcpu_destroy; + goto unlock_vcpu_destroy; } kvm_for_each_vcpu(r, v, kvm) if (v->vcpu_id == id) { r = -EEXIST; - goto vcpu_destroy; + goto unlock_vcpu_destroy; } BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); @@ -1637,7 +1637,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) r = create_vcpu_fd(vcpu); if (r < 0) { kvm_put_kvm(kvm); - goto vcpu_destroy; + goto unlock_vcpu_destroy; } kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; @@ -1651,8 +1651,9 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) mutex_unlock(&kvm->lock); return r; -vcpu_destroy: +unlock_vcpu_destroy: mutex_unlock(&kvm->lock); +vcpu_destroy: kvm_arch_vcpu_destroy(vcpu); return r; } |