From: Daniel Micay <danielmicay@gmail.com>
To: Kees Cook <keescook@chromium.org>
Cc: Matthew Wilcox <willy@infradead.org>,
Jann Horn <jannh@google.com>,
Alexander Popov <alex.popov@linux.com>,
Will Deacon <will@kernel.org>,
Andrey Ryabinin <aryabinin@virtuozzo.com>,
Alexander Potapenko <glider@google.com>,
Dmitry Vyukov <dvyukov@google.com>,
Christoph Lameter <cl@linux.com>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Andrew Morton <akpm@linux-foundation.org>,
Masahiro Yamada <masahiroy@kernel.org>,
Masami Hiramatsu <mhiramat@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Peter Zijlstra <peterz@infradead.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Patrick Bellasi <patrick.bellasi@arm.com>,
David Howells <dhowells@redhat.com>,
Eric Biederman <ebiederm@xmission.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Laura Abbott <labbott@redhat.com>, Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrey Konovalov <andreyknvl@google.com>,
Pavel Machek <pavel@denx.de>,
Valentin Schneider <valentin.schneider@arm.com>,
kasan-dev <kasan-dev@googlegroups.com>,
Linux-MM <linux-mm@kvack.org>,
Kernel Hardening <kernel-hardening@lists.openwall.com>,
kernel list <linux-kernel@vger.kernel.org>,
notify@kernel.org
Subject: Re: [PATCH RFC v2 0/6] Break heap spraying needed for exploiting use-after-free
Date: Mon, 5 Oct 2020 22:19:10 -0400 [thread overview]
Message-ID: <CA+DvKQ+-k9pk1mUrEiTRKzSsz1ugCiv1A3Owd97dop0HPXa6MA@mail.gmail.com> (raw)
In-Reply-To: <202010051905.62D79560@keescook>
It will reuse the memory for other things when the whole slab is freed
though. Not really realistic to change that without it being backed by
virtual memory along with higher-level management of regions to avoid
intense fragmentation and metadata waste. It would depend a lot on
having much finer-grained slab caches, otherwise it's not going to be
much of an alternative to a quarantine feature. Even then, a
quarantine feature is still useful, but is less suitable for a
mainstream feature due to performance cost. Even a small quarantine
has a fairly high performance cost.
next prev parent reply other threads:[~2020-10-06 2:19 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-29 18:35 [PATCH RFC v2 0/6] Break heap spraying needed for exploiting use-after-free Alexander Popov
2020-09-29 18:35 ` [PATCH RFC v2 1/6] mm: Extract SLAB_QUARANTINE from KASAN Alexander Popov
2020-09-29 18:35 ` [PATCH RFC v2 2/6] mm/slab: Perform init_on_free earlier Alexander Popov
2020-09-30 12:50 ` Alexander Potapenko
2020-10-01 19:48 ` Alexander Popov
2020-12-03 19:50 ` Alexander Popov
2020-12-03 20:49 ` Andrew Morton
2020-12-04 11:54 ` Alexander Popov
2020-09-29 18:35 ` [PATCH RFC v2 3/6] mm: Integrate SLAB_QUARANTINE with init_on_free Alexander Popov
2020-09-29 18:35 ` [PATCH RFC v2 4/6] mm: Implement slab quarantine randomization Alexander Popov
2020-09-29 18:35 ` [PATCH RFC v2 5/6] lkdtm: Add heap quarantine tests Alexander Popov
2020-09-29 18:35 ` [PATCH RFC v2 6/6] mm: Add heap quarantine verbose debugging (not for merge) Alexander Popov
2020-10-01 19:42 ` [PATCH RFC v2 0/6] Break heap spraying needed for exploiting use-after-free Alexander Popov
2020-10-05 22:56 ` Jann Horn
2020-10-06 0:44 ` Matthew Wilcox
2020-10-06 0:48 ` Jann Horn
2020-10-06 2:09 ` Kees Cook
2020-10-06 2:16 ` Jann Horn
2020-10-06 2:19 ` Daniel Micay [this message]
2020-10-06 8:35 ` Christopher Lameter
2020-10-06 8:32 ` Christopher Lameter
2020-10-06 17:56 ` Alexander Popov
2020-10-06 18:37 ` Jann Horn
2020-10-06 19:25 ` Alexander Popov
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