Re: [PATCH] iommu/arm-smmu-v3: Fix pgsize_bit for sva domains

[Will Deacon]

On Sat, 12 Apr 2025 10:23:54 +1000, Balbir Singh wrote:
> UBSan caught a bug with IOMMU SVA domains, where the reported exponent
> value in __arm_smmu_tlb_inv_range() was >= 64.
> __arm_smmu_tlb_inv_range() uses the domain's pgsize_bitmap to compute
> the number of pages to invalidate and the invalidation range. Currently
> arm_smmu_sva_domain_alloc() does not setup the iommu domain's
> pgsize_bitmap. This leads to __ffs() on the value returning 64 and that
> leads to undefined behaviour w.r.t. shift operations
> 
> [...]

Applied to iommu (arm/smmu/fixes), thanks!

[1/1] iommu/arm-smmu-v3: Fix pgsize_bit for sva domains
      https://git.kernel.org/iommu/c/12f78021973a

Cheers,
-- 
Will

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