Re: [BISECTED] Boot hangs when SLUB_DEBUG_ON=y

[Andrey Konovalov]

On Wed, Nov 22, 2023 at 4:17 AM Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx> wrote:
>
> On Tue, Nov 21, 2023 at 1:08 PM <andrey.konovalov@xxxxxxxxx> wrote:
> >
> > From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
> >
> > Evict alloc/free stack traces from the stack depot for Generic KASAN
> > once they are evicted from the quaratine.
> >
> > For auxiliary stack traces, evict the oldest stack trace once a new one
> > is saved (KASAN only keeps references to the last two).
> >
> > Also evict all saved stack traces on krealloc.
> >
> > To avoid double-evicting and mis-evicting stack traces (in case KASAN's
> > metadata was corrupted), reset KASAN's per-object metadata that stores
> > stack depot handles when the object is initialized and when it's evicted
> > from the quarantine.
> >
> > Note that stack_depot_put is no-op if the handle is 0.
> >
> > Reviewed-by: Marco Elver <elver@xxxxxxxxxx>
> > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
>
> I observed boot hangs on a few SLUB configurations.
>
> Having other users of stackdepot might be the cause. After passing
> 'slub_debug=-' which disables SLUB debugging, it boots fine.

Hi Hyeonggon,

Just mailed a fix.

Thank you for the report!