Re: [PATCH v2 0/7] iommu/arm-smmu-v3: Quarantine device upon ATC invalidation timeout

Nicolin Chen
2026-03-18T20:05:17Z

On Wed, Mar 18, 2026 at 07:47:18AM +0000, Tian, Kevin wrote:
> > From: Nicolin Chen <nicolinc@nvidia.com>
> > Sent: Wednesday, March 18, 2026 3:16 AM
> >
> > Hi all,
> >
> > This series addresses a critical vulnerability and stability issue where an
> > unresponsive PCIe device failing to process ATC (Address Translation Cache)
> > invalidation requests leads to silent data corruption and continuous SMMU
> > CMDQ error spam.
> >
>
> None of the patches in this series contains a Fixed tag and cc stable.

Hmm, I guess AI overly polished the cover letter so it sounds too
strong?

This is essentially a vulnerability (potential memory corruption).
And none of these patches actually fixes any regression. The PATCH
7 even requires the arm_smmu_invs series which has not been merged
yet :-/

Nicolin