linux-kernel - Re: [PATCH v1 06/12] iommufd/selftest: Implement mock_get_viommu_size and mock_viommu

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: <aEsKZNh4ow53d7hW@nvidia.com>
Date: Thu, 12 Jun 2025 10:12:04 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: "Tian, Kevin" <kevin.tian@...el.com>
CC: "jgg@...dia.com" <jgg@...dia.com>, "will@...nel.org" <will@...nel.org>,
	"robin.murphy@....com" <robin.murphy@....com>, "joro@...tes.org"
	<joro@...tes.org>, "ddutile@...hat.com" <ddutile@...hat.com>, "Liu, Yi L"
	<yi.l.liu@...el.com>, "peterz@...radead.org" <peterz@...radead.org>,
	"jsnitsel@...hat.com" <jsnitsel@...hat.com>, "praan@...gle.com"
	<praan@...gle.com>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "iommu@...ts.linux.dev"
	<iommu@...ts.linux.dev>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "patches@...ts.linux.dev"
	<patches@...ts.linux.dev>, "baolu.lu@...ux.intel.com"
	<baolu.lu@...ux.intel.com>
Subject: Re: [PATCH v1 06/12] iommufd/selftest: Implement
 mock_get_viommu_size and mock_viommu_init

On Thu, Jun 12, 2025 at 08:17:19AM +0000, Tian, Kevin wrote:
> > From: Nicolin Chen <nicolinc@...dia.com>
> > Sent: Tuesday, June 10, 2025 1:13 AM
> > 
> > Sanitize the inputs and report the size of struct mock_viommu on success,
> > in mock_get_viommu_size().
> > 
> > The core will ensure the viommu_type is set to the core vIOMMU object, so
> > simply init the driver part in mock_viommu_init().
> > 
> > The mock_viommu_alloc() will be cleaned up once the transition is done.
> > 
> > Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> 
> Reviewed-by: Kevin Tian <kevin.tian@...el.com>
> 
> btw I didn't see where mock_viommu->s2_parent is set in the original
> code. Is it a bug or oversight?

Looks like that was missing.. But it shouldn't trigger any bug
since mock_nested->parent doesn't have any meaningful value in
the code..

Perhaps we should think of adding some use case out of it. Or,
we'd need to clean it away..

Thanks
Nicolin