[PATCH V3] arm64/mm: Validate hotplug range before creating linear mapping

[Will Deacon]

On Fri, 13 Nov 2020 13:00:14 +0530, Anshuman Khandual wrote:
> During memory hotplug process, the linear mapping should not be created for
> a given memory range if that would fall outside the maximum allowed linear
> range. Else it might cause memory corruption in the kernel virtual space.
> 
> Maximum linear mapping region is [PAGE_OFFSET..(PAGE_END -1)] accommodating
> both its ends but excluding PAGE_END. Max physical range that can be mapped
> inside this linear mapping range, must also be derived from its end points.
> 
> [...]

Applied to arm64 (for-next/fixes), thanks!

[1/1] arm64/mm: Validate hotplug range before creating linear mapping
      https://git.kernel.org/arm64/c/58284a901b42

Cheers,
-- 
Will

https://fixes.arm64.dev
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