Re: [PATCH v2 12/32] mm/vmalloc: vmalloc_to_page() use pte_offset_kernel()

[Mark Brown]

On Tue, Jul 11, 2023 at 09:13:18AM -0700, Hugh Dickins wrote:
> On Tue, 11 Jul 2023, Mark Brown wrote:
> > On Mon, Jul 10, 2023 at 09:34:42PM -0700, Hugh Dickins wrote:
> > 
> > > I suppose I should ask you to try reverting this 0d1c81edc61e alone
> > > from 6.5-rc1: the consistency of your bisection implies that it will
> > > "fix" the issues, and it is a commit which we could drop.  It makes
> > > me a little nervous, applying userspace-pagetable validation to kernel
> > > pagetables, so I don't want to drop it; and it would really be cargo-
> > > culting to drop it without understanding.  But we could drop it.
> > 
> > I did look at that, it doesn't revert cleanly by itself. ...
> 
> Right, that ptep_get() wrapper on the next line came in on top.
> The patch to revert just 0d1c81edc61e is this:

Still investigating but I'm pretty convinced this is nothing to do with
your commit/series and is just common or garden memory corruption that
just happens to get tickled by your changes.  Sorry for the noise.

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