Re: [PATCH] iommu/arm-smmu-qcom: Fix mask extraction for bootloader programmed SMRs

[Will Deacon]

On Mon, 25 Jan 2021 13:52:25 -0800, Isaac J. Manjarres wrote:
> When extracting the mask for a SMR that was programmed by the
> bootloader, the SMR's valid bit is also extracted and is treated
> as part of the mask, which is not correct. Consider the scenario
> where an SMMU master whose context is determined by a bootloader
> programmed SMR is removed (omitting parts of device/driver core):
> 
> ->iommu_release_device()
>  -> arm_smmu_release_device()
>   -> arm_smmu_master_free_smes()
>    -> arm_smmu_free_sme() /* Assume that the SME is now free */
>    -> arm_smmu_write_sme()
>     -> arm_smmu_write_smr() /* Construct SMR value using mask and SID */
> 
> [...]

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

[1/1] iommu/arm-smmu-qcom: Fix mask extraction for bootloader programmed SMRs
      https://git.kernel.org/will/c/dead723e6f04

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev