netdev - Re: [PATCH v12 vfio 5/7] vfio/pds: Add support for dirty page tracking

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]

Date: Tue, 25 Jul 2023 11:00:20 -0700
From: Brett Creeley <bcreeley@....com>
To: Simon Horman <simon.horman@...igine.com>,
 Brett Creeley <brett.creeley@....com>
Cc: kvm@...r.kernel.org, netdev@...r.kernel.org, alex.williamson@...hat.com,
 jgg@...dia.com, yishaih@...dia.com, shameerali.kolothum.thodi@...wei.com,
 kevin.tian@...el.com, shannon.nelson@....com
Subject: Re: [PATCH v12 vfio 5/7] vfio/pds: Add support for dirty page
 tracking

On 7/25/2023 10:29 AM, Simon Horman wrote:
> Caution: This message originated from an External Source. Use proper caution when opening attachments, clicking links, or responding.
> 
> 
> On Wed, Jul 19, 2023 at 03:35:25PM -0700, Brett Creeley wrote:
> 
> ...
> 
>> +static void pds_vfio_dirty_free_bitmaps(struct pds_vfio_dirty *dirty)
>> +{
>> +     if (dirty->host_seq.bmp)
>> +             vfree(dirty->host_seq.bmp);
>> +     if (dirty->host_ack.bmp)
>> +             vfree(dirty->host_ack.bmp);
> 
> Hi Brett,
> 
> I don't think there is a need to guard these vfree calls,
> as I think they will be no-ops with NULL arguments.

Another good catch. I will also fix this for v13. Thanks for the review.

Brett

> 
>> +
>> +     dirty->host_seq.bmp = NULL;
>> +     dirty->host_ack.bmp = NULL;
>> +}
> 
> ...
>