linux-kernel - Re: [PATCH v25 10/21] x86/sgx: Linux Enclave Driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <op.0fiundhawjvjmi@hhuan26-mobl1.amr.corp.intel.com>
Date:   Wed, 05 Feb 2020 09:58:15 -0600
From:   "Haitao Huang" <haitao.huang@...ux.intel.com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-sgx@...r.kernel.org,
        "Jarkko Sakkinen" <jarkko.sakkinen@...ux.intel.com>
Cc:     akpm@...ux-foundation.org, dave.hansen@...el.com,
        sean.j.christopherson@...el.com, nhorman@...hat.com,
        npmccallum@...hat.com, haitao.huang@...el.com,
        andriy.shevchenko@...ux.intel.com, tglx@...utronix.de,
        kai.svahn@...el.com, bp@...en8.de, josh@...htriplett.org,
        luto@...nel.org, kai.huang@...el.com, rientjes@...gle.com,
        cedric.xing@...el.com, puiterwijk@...hat.com,
        "Jarkko Sakkinen" <jarkko.sakkinen@...el.com>,
        linux-security-module@...r.kernel.org,
        "Suresh Siddha" <suresh.b.siddha@...el.com>
Subject: Re: [PATCH v25 10/21] x86/sgx: Linux Enclave Driver

On Tue, 04 Feb 2020 00:05:34 -0600, Jarkko Sakkinen  
<jarkko.sakkinen@...ux.intel.com> wrote:
...
> +const struct file_operations sgx_provision_fops = {
> +	.owner			= THIS_MODULE,
> +};
> +
> +static struct miscdevice sgx_dev_enclave = {
> +	.minor = MISC_DYNAMIC_MINOR,
> +	.name = "enclave",
> +	.nodename = "sgx/enclave",
> +	.fops = &sgx_encl_fops,
> +};
> +

How does kernel manage name conflict if multiple misc device requesting  
"enclave" ?

And the attributes for a udev rule to match this device according to  
udevadm output are:
SUBSYSTEM=="misc",KERNEL=="enclave"

Is that specific enough to uniquely match this device?

Similar questions for the "provision" device introduced later in this  
series.

Thanks
Haitao