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Date:   Tue, 10 Aug 2021 21:25:54 +0100
From:   Will Deacon <>
        Ashish Mhetre <>
        Will Deacon <>,,,
Subject: Re: [Patch V3 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation

On Tue, 10 Aug 2021 10:13:59 +0530, Ashish Mhetre wrote:
> When two devices with same SID are getting probed concurrently through
> iommu_probe_device(), the iommu_group and iommu_domain are allocated more
> than once because they are not protected for concurrency. This is leading
> to context faults when one device is accessing IOVA from other device.
> Fix this by protecting iommu_domain and iommu_group creation with mutexes.
> Changes in v3:
> * Updated commit messages.
> * Added Signed-off-by in patch 2.
> [...]

Applied to will (for-joerg/arm-smmu/updates), thanks!

[1/2] iommu: Fix race condition during default domain allocation
[2/2] iommu/arm-smmu: Fix race condition during iommu_group creation


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