linux-kernel - Re: Failure during Stack Depot allocating hash table of 1048576 entries with kvcalloc

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Date:   Sun, 29 Jan 2023 12:50:14 -0800
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Linux regressions mailing list <regressions@...ts.linux.dev>,
        Mirsad Goran Todorovac <mirsad.todorovac@....unizg.hr>,
        Vlastimil Babka <vbabka@...e.cz>,
        Alexander Potapenko <glider@...gle.com>,
        Marco Elver <elver@...gle.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        linux-mm <linux-mm@...ck.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Zhaoyang Huang <zhaoyang.huang@...soc.com>
Subject: Re: Failure during Stack Depot allocating hash table of 1048576
 entries with kvcalloc

On Sat, 28 Jan 2023 15:26:00 +0100 Borislav Petkov <bp@...en8.de> wrote:

> On Sat, Jan 28, 2023 at 02:55:58PM +0100, Linux kernel regression tracking (Thorsten Leemhuis) wrote:
> > On 28.01.23 12:03, Borislav Petkov wrote:
> > > On Sat, Jan 28, 2023 at 03:41:50AM +0100, Mirsad Goran Todorovac wrote:
> > >> This appears to be a duplicate of the report:
> > >> https://lore.kernel.org/linux-mm/2c677d85-820c-d41a-fc98-7d3974b49e42@alu.unizg.hr/raw
> > > 
> > > Yah, looks like
> > > 
> > > 56a61617dd22 ("mm: use stack_depot for recording kmemleak's backtrace")
> > > 
> > > needs to be reverted.
> > 
> > Unless I'm missing something (which might easily be the case) there is a
> > patch for that issue in -mm already:
> > 
> > https://lore.kernel.org/all/20230119224022.80752C433F0@smtp.kernel.org/
> > 
> > Or where two different issues discussed in the thread Mirsad mentioned
> > above?
> 
> Probably the same issue. This one fixes the issue on my machine - thanks!
> 
> Tested-by: Borislav Petkov (AMD) <bp@...en8.de>
> 

OK, thanks, I didn't realize this issue was so serious.

I reordered Zhaoyang Huang's series so that "mm: use
stack_depot_early_init for kmemleak" comes ahead of "mm: move
KMEMLEAK's Kconfig items from lib to mm" and I've staged "mm: use
stack_depot_early_init for kmemleak" in the mm-hotfixes branch for
upstream merging in this -rc cycle.