linux-kernel - Re: [PATCH v5 05/14] virt: sev-guest: Add vmpck_id to snp_guest

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: <5b005b81-792a-4338-8085-e064c273f887@amd.com>
Date:   Thu, 2 Nov 2023 09:33:44 +0530
From:   "Nikunj A. Dadhania" <nikunj@....com>
To:     Tom Lendacky <thomas.lendacky@....com>,
        Dionna Amalie Glaze <dionnaglaze@...gle.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org, kvm@...r.kernel.org,
        bp@...en8.de, mingo@...hat.com, tglx@...utronix.de,
        dave.hansen@...ux.intel.com, pgonda@...gle.com, seanjc@...gle.com,
        pbonzini@...hat.com
Subject: Re: [PATCH v5 05/14] virt: sev-guest: Add vmpck_id to snp_guest_dev
 struct

On 10/30/2023 10:42 PM, Tom Lendacky wrote:
> On 10/30/23 11:16, Dionna Amalie Glaze wrote:
>> On Sun, Oct 29, 2023 at 11:38 PM Nikunj A Dadhania <nikunj@....com> wrote:

>>> @@ -656,32 +674,14 @@ static const struct file_operations snp_guest_fops = {
>>>          .unlocked_ioctl = snp_guest_ioctl,
>>>   };
>>>
>>> -static u8 *get_vmpck(int id, struct snp_secrets_page_layout *layout, u32 **seqno)
>>> +bool snp_assign_vmpck(struct snp_guest_dev *dev, int vmpck_id)
>>>   {
>>> -       u8 *key = NULL;
>>> +       if (WARN_ON(vmpck_id > 3))
>>> +               return false;
>>
>> The vmpck_id is an int for some reason, so < 0 is also a problem. Can
>> we not use unsigned int?

Yes, I will update that in my next revision,

Thanks
Nikunj