linux-kernel - Re: [PATCH v2 1/7] genirq/msi: Store the IOMMU IOVA directly in msi_desc instead of iommu

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Message-ID: <20250221134112.GK50639@nvidia.com>
Date: Fri, 21 Feb 2025 09:41:12 -0400
From: Jason Gunthorpe <jgg@...dia.com>
To: Joerg Roedel <joro@...tes.org>
Cc: Nicolin Chen <nicolinc@...dia.com>,
	Thomas Gleixner <tglx@...utronix.de>, kevin.tian@...el.com,
	maz@...nel.org, will@...nel.org, robin.murphy@....com,
	shuah@...nel.org, iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kselftest@...r.kernel.org, eric.auger@...hat.com,
	baolu.lu@...ux.intel.com, yi.l.liu@...el.com, yury.norov@...il.com,
	jacob.pan@...ux.microsoft.com, patches@...ts.linux.dev
Subject: Re: [PATCH v2 1/7] genirq/msi: Store the IOMMU IOVA directly in
 msi_desc instead of iommu_cookie

On Fri, Feb 21, 2025 at 12:10:46PM +0100, Joerg Roedel wrote:
> Hi Nicolin,
> 
> On Fri, Feb 21, 2025 at 10:28:20AM +0100, Thomas Gleixner wrote:
> > On Wed, Feb 19 2025 at 17:31, Nicolin Chen wrote:
> > > Fix the MSI cookie UAF by removing the cookie pointer. The translated IOVA
> > > address is already known during iommu_dma_prepare_msi() and cannot change.
> > > Thus, it can simply be stored as an integer in the MSI descriptor.
> > >
> > > A following patch will fix the other UAF in iommu_get_domain_for_dev(), by
> > > using the IOMMU group mutex.
> > 
> > "A following patch" has no meaning once the current one is
> > applied. Simply say:
> > 
> >   The other UAF in iommu_get_domain_for_dev() will be addressed
> >   seperately, by ....
> > 
> > > Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
> > > Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> > 
> > With that fixed:
> > 
> > Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
> 
> Can you please send a v3 with updated commit message and all the
> review/acked tags added? I will pick it up then.

Can I send you a PR instead? I'd like it on a branch so we can work on
the iommufd specific bits that where in v1.

Jason