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SubjectRe: [PATCH v38 15/24] x86/sgx: Enable provisioning for remote attestation
On Mon, Sep 21, 2020 at 08:07:28PM +0200, Borislav Petkov wrote:
> On Tue, Sep 15, 2020 at 02:28:33PM +0300, Jarkko Sakkinen wrote:
> > @@ -181,5 +192,12 @@ int __init sgx_drv_init(void)
> > return ret;
> > }
> >
> > + ret = misc_register(&sgx_dev_provision);
> > + if (ret) {
> > + pr_err("Creating /dev/sgx/provision failed with %d.\n", ret);
> > + misc_deregister(&sgx_dev_enclave);
>
> The comment over misc_deregister() says:
>
> * Unregister a miscellaneous device that was previously
> * successfully registered with misc_register().
>
> but this is not a successful registration here, in the if (ret) case...

'sgx_dev_enclave' is successfully register whenever that happens. Am I
missing something here?

> > + * sgx_ioc_enclave_set_attribute - handler for %SGX_IOC_ENCLAVE_PROVISION
> > + * @filep: open file to /dev/sgx
> ^^^^^^
>
> Can you guess what my comment to that would be...?

There is also another incosistency that I fixed: the first line should
have 'sgx_ioc_enclave_provision'.

> > +static long sgx_ioc_enclave_provision(struct sgx_encl *encl,
> > + void __user *arg)
>
> No need for the line break: both function args can fit on the same line.

Fixed this one too, thanks.

>
> ...
>
> --
> Regards/Gruss,
> Boris.
>
> https://people.kernel.org/tglx/notes-about-netiquette

/Jarkko

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