Messages in this thread | | | Date | Tue, 21 Jul 2020 12:00:36 -0700 | From | Kees Cook <> | Subject | Re: [Regression] hangs caused by commit 3202fa62fb (slub: relocate freelist pointer to middle of object) |
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On Tue, Jul 21, 2020 at 04:55:12PM +0200, Paul Menzel wrote: > No idea, if you are aware of it yet, but three people verified that commit > 3202fa62fb (slub: relocate freelist pointer to middle of object) causes a > regression on AMD hardware [1].
Hi, thanks for emailing; I don't get bugzilla notifications, so I hadn't seen this yet.
> It’d be great, if you took a look, and advised if this commit (and > follow-ups) should be reverted, until the issue is analyzed.
There have been a number of fixes to that commit (which I see are mentioned in a quick skim of the bug), but they've mostly been around additional slab debugging features. If it's causing a problem outside of that, my instinct would be there might be a use-after-free happening, but I'll go read the bug more closely now, and comment there (or here, if needed).
Thanks!
-- Kees Cook
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