-next boot failures during KVM setup

[Nathan Chancellor]

On Mon, Jun 08, 2026 at 10:56:12PM +0200, Ard Biesheuvel wrote:
> Haven't seen this myself, surprisingly, but yeah, this is obviously related.
> 
> By now, I am wondering if unmapping that region entirely is really worth the
> hassle, or whether we'd be better off just remapping it read-only.
> 
> Given we're at -rc7, I'd lean towards dropping the whole branch for now, or
> alternatively, only drop/revert "arm64: mm: Unmap kernel data/bss entirely from the 
> linear map" (and its followup fix "arm64: mm: Defer remap of linear alias of
> data/bss") so that the region always remains readable via the linear map.

FWIW, I can confirm that "arm64: mm: Unmap kernel data/bss entirely from
the linear map" is the culprit for this particular issue based on my
bisect. Reverting those two changes on top of next-20260608 avoids the
issue.

-- 
Cheers,
Nathan