From: Will Deacon <will@kernel.org>
To: robin.murphy@arm.com, vdumpa@nvidia.com,
Ashish Mhetre <amhetre@nvidia.com>
Cc: catalin.marinas@arm.com, kernel-team@android.com,
Will Deacon <will@kernel.org>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Patch V3 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation
Date: Tue, 10 Aug 2021 21:25:54 +0100 [thread overview]
Message-ID: <162861955924.3590382.10228157894867875931.b4-ty@kernel.org> (raw)
In-Reply-To: <1628570641-9127-1-git-send-email-amhetre@nvidia.com>
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
https://git.kernel.org/will/c/211ff31b3d33
[2/2] iommu/arm-smmu: Fix race condition during iommu_group creation
https://git.kernel.org/will/c/b1a1347912a7
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
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prev parent reply other threads:[~2021-08-10 20:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-10 4:43 [Patch V3 0/2] iommu/arm-smmu: Fix races in iommu domain/group creation Ashish Mhetre
2021-08-10 4:44 ` [Patch V3 1/2] iommu: Fix race condition during default domain allocation Ashish Mhetre
2021-08-10 4:44 ` [Patch V3 2/2] iommu/arm-smmu: Fix race condition during iommu_group creation Ashish Mhetre
2021-08-10 20:25 ` Will Deacon [this message]
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