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kvm: call kvm_arch_destroy_vm if vm creation fails

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In kvm_create_vm(), if we've successfully called kvm_arch_init_vm(), but
then fail later in the function, we need to call kvm_arch_destroy_vm()
so that it can do any necessary cleanup (like freeing memory).

Fixes: 44a95dae1d ("KVM: x86: Detect and Initialize AVIC support")

Signed-off-by: John Sperbeck <jsperbeck@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Junaid Shahid <junaids@google.com>
[Remove dependency on "kvm: Don't clear reference count on
 kvm_create_vm() error path" which was not committed. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jim Mattson 2019-10-25 13:34:58 +02:00 committed by Paolo Bonzini
parent 9121923c45
commit a97b0e773e
1 changed files with 7 additions and 5 deletions
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12
virt/kvm/kvm_main.c
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@ -641,7 +641,6 @@ static struct kvm *kvm_create_vm(unsigned long type)
mutex_init(&kvm->lock);
mutex_init(&kvm->irq_lock);
mutex_init(&kvm->slots_lock);
refcount_set(&kvm->users_count, 1);
INIT_LIST_HEAD(&kvm->devices);
BUILD_BUG_ON(KVM_MEM_SLOTS_NUM > SHRT_MAX);
@ -650,7 +649,7 @@ static struct kvm *kvm_create_vm(unsigned long type)
struct kvm_memslots *slots = kvm_alloc_memslots();
if (!slots)
goto out_err_no_disable;
goto out_err_no_arch_destroy_vm;
/* Generations must be different for each address space. */
slots->generation = i;
rcu_assign_pointer(kvm->memslots[i], slots);
@ -660,12 +659,13 @@ static struct kvm *kvm_create_vm(unsigned long type)
rcu_assign_pointer(kvm->buses[i],
kzalloc(sizeof(struct kvm_io_bus), GFP_KERNEL_ACCOUNT));
if (!kvm->buses[i])
goto out_err_no_disable;
goto out_err_no_arch_destroy_vm;
}
refcount_set(&kvm->users_count, 1);
r = kvm_arch_init_vm(kvm, type);
if (r)
goto out_err_no_disable;
goto out_err_no_arch_destroy_vm;
r = hardware_enable_all();
if (r)
@ -699,7 +699,9 @@ out_err_no_irq_srcu:
out_err_no_srcu:
hardware_disable_all();
out_err_no_disable:
refcount_set(&kvm->users_count, 0);
kvm_arch_destroy_vm(kvm);
WARN_ON_ONCE(!refcount_dec_and_test(&kvm->users_count));
out_err_no_arch_destroy_vm:
for (i = 0; i < KVM_NR_BUSES; i++)
kfree(kvm_get_bus(kvm, i));
for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++)