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KVM: use after free in kvm_ioctl_create_device()

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We should move the ops->destroy(dev) after the list_del(&dev->vm_node)
so that we don't use "dev" after freeing it.

Fixes: a28ebea2ad ("KVM: Protect device ops->create and list_add with kvm->lock")
Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Signed-off-by: Radim Krčmář <[email protected]>
This commit is contained in:
Dan Carpenter 2016-11-30 22:21:05 +03:00 • committed by Radim Krčmář
commit a0f1d21c1c
1 changed files with 1 additions and 1 deletions
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2
virt/kvm/kvm_main.c
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@ -2889,10 +2889,10 @@ static int kvm_ioctl_create_device(struct kvm *kvm,
ret = anon_inode_getfd(ops->name, &kvm_device_fops, dev, O_RDWR | O_CLOEXEC);
if (ret < 0) {
ops->destroy(dev);
mutex_lock(&kvm->lock);
list_del(&dev->vm_node);
mutex_unlock(&kvm->lock);
ops->destroy(dev);
return ret;
}