[PATCH] arm64: set UXN on swapper page tables

[Catalin Marinas]

On Wed, Jul 20, 2022 at 08:04:48PM +0100, Catalin Marinas wrote:
> 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

I'm dropping this patch from for-next/fixes as it breaks linux-next
(interacts badly with stuff already queued). We'll send it to -stable
separately as that's no longer needed in mainline after 5.19.

-- 
Catalin