On Tue, Jul 11, 2023 at 06:57:33PM +0100, Mark Brown wrote: > 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. Did you get to the bottom of this? If not, do you have a reliable way to reproduce the problem? I don't like the sound of memory corruption :( Will
