CVE-2026-64153 — drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN

Commit "iommu: return full error code from iommu_map_sg[_atomic]()" changed iommu_map_sgtable() to return an ssize_t and negative values in error cases, rather than a size_t and a zero.

Store the return value in the appropriate type and in case of error, return it rather than WARNing.

Patchwork: https://patchwork.freedesktop.org/patch/719685/

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CVE-2026-64153 — drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN