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Date: Thu, 3 Dec 2020 12:49:14 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: alex.popov@...ux.com
Cc: Alexander Potapenko <glider@...gle.com>, Kees Cook
<keescook@...omium.org>, Jann Horn <jannh@...gle.com>, Will Deacon
<will@...nel.org>, Andrey Ryabinin <aryabinin@...tuozzo.com>, Dmitry Vyukov
<dvyukov@...gle.com>, Christoph Lameter <cl@...ux.com>, Pekka Enberg
<penberg@...nel.org>, David Rientjes <rientjes@...gle.com>, Joonsoo Kim
<iamjoonsoo.kim@....com>, Masahiro Yamada <masahiroy@...nel.org>, Masami
Hiramatsu <mhiramat@...nel.org>, Steven Rostedt <rostedt@...dmis.org>,
Peter Zijlstra <peterz@...radead.org>, Krzysztof Kozlowski
<krzk@...nel.org>, Patrick Bellasi <patrick.bellasi@....com>, David Howells
<dhowells@...hat.com>, Eric Biederman <ebiederm@...ssion.com>, Johannes
Weiner <hannes@...xchg.org>, Laura Abbott <labbott@...hat.com>, Arnd
Bergmann <arnd@...db.de>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Daniel Micay <danielmicay@...il.com>, Andrey Konovalov
<andreyknvl@...gle.com>, Matthew Wilcox <willy@...radead.org>, Pavel Machek
<pavel@...x.de>, Valentin Schneider <valentin.schneider@....com>, kasan-dev
<kasan-dev@...glegroups.com>, Linux Memory Management List
<linux-mm@...ck.org>, Kernel Hardening
<kernel-hardening@...ts.openwall.com>, LKML <linux-kernel@...r.kernel.org>,
notify@...nel.org
Subject: Re: [PATCH RFC v2 2/6] mm/slab: Perform init_on_free earlier
On Thu, 3 Dec 2020 22:50:27 +0300 Alexander Popov <alex.popov@...ux.com> wrote:
> On 30.09.2020 15:50, Alexander Potapenko wrote:
> > On Tue, Sep 29, 2020 at 8:35 PM Alexander Popov <alex.popov@...ux.com> wrote:
> >>
> >> Currently in CONFIG_SLAB init_on_free happens too late, and heap
> >> objects go to the heap quarantine being dirty. Lets move memory
> >> clearing before calling kasan_slab_free() to fix that.
> >>
> >> Signed-off-by: Alexander Popov <alex.popov@...ux.com>
> > Reviewed-by: Alexander Potapenko <glider@...gle.com>
>
> Hello!
>
> Can this particular patch be considered for the mainline kernel?
All patches are considered ;) And merged if they're reviewed, tested,
judged useful, etc.
If you think this particular patch should be fast-tracked then please
send it as a non-RFC, standalone patch. Please also enhance the
changelog so that it actually explains what goes wrong. Presumably
"objects go to the heap quarantine being dirty" causes some
user-visible problem? What is that problem?
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