[PATCH] arm64: set UXN on swapper page tables

Catalin Marinas catalin.marinas at arm.com
Wed Jul 20 12:04:48 PDT 2022


On Tue, 19 Jul 2022 16:49:09 -0700, Peter Collingbourne wrote:
> On a system that implements FEAT_EPAN, read/write access to the idmap
> is denied because UXN is not set on the swapper PTEs. As a result,
> idmap_kpti_install_ng_mappings panics the kernel when accessing
> __idmap_kpti_flag. Fix it by setting UXN on these PTEs.
> 
> 

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

[1/1] arm64: set UXN on swapper page tables
      https://git.kernel.org/arm64/c/f7b4c3b82e7d

-- 
Catalin




More information about the linux-arm-kernel mailing list