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SubjectRe: [PATCH v17 18/23] platform/x86: Intel SGX driver
On Mon, Dec 17, 2018 at 11:09:33AM -0800, Dave Hansen wrote:
> On 12/17/18 10:48 AM, Sean Christopherson wrote:
> > We can't set mm to NULL as we need it to unregister the notifier, and
> > I'm fairly certain attempting to unregister in the release callback
> > will deadlock.
>
> Suggestion:
>
> It looks like you only expect one VMA per enclave. Things go bonkers if
> this is not true. So, instead of storing encl->mm, don't. You can get
> the mm from vma->vm_mm and you could just store encl->vma instead.

The code actually supports having multiple VMAs per enclave.

/Jarkko

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