From: Christoph Lameter <cl@linux.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm: Add additional consistency check
Date: Tue, 18 Apr 2017 08:37:13 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.20.1704180834570.13829@east.gentwo.org> (raw)
In-Reply-To: <20170418064124.GA22360@dhcp22.suse.cz>
On Tue, 18 Apr 2017, Michal Hocko wrote:
> Are you even reading those emails? First of all we are talking about
> slab here. Secondly I've already pointed out that the BUG_ON(!PageSlab)
> in kmem_freepages is already too late because we do operate on a
> potential garbage from invalid page...
Before I forget:
1. The patch affects both slab and slub since it patches mm/slab.h and is
called by both allocators.
2. The check in the patch we are discussing here when calling
kmem_cache_free() will be executing before kmem_freepages() is called
in slab.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Lameter <cl@linux.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: Kees Cook <keescook@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
Pekka Enberg <penberg@kernel.org>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Linux-MM <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mm: Add additional consistency check
Date: Tue, 18 Apr 2017 08:37:13 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.20.1704180834570.13829@east.gentwo.org> (raw)
In-Reply-To: <20170418064124.GA22360@dhcp22.suse.cz>
On Tue, 18 Apr 2017, Michal Hocko wrote:
> Are you even reading those emails? First of all we are talking about
> slab here. Secondly I've already pointed out that the BUG_ON(!PageSlab)
> in kmem_freepages is already too late because we do operate on a
> potential garbage from invalid page...
Before I forget:
1. The patch affects both slab and slub since it patches mm/slab.h and is
called by both allocators.
2. The check in the patch we are discussing here when calling
kmem_cache_free() will be executing before kmem_freepages() is called
in slab.
--
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next prev parent reply other threads:[~2017-04-18 13:37 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-31 16:40 [PATCH] mm: Add additional consistency check Kees Cook
2017-03-31 16:40 ` Kees Cook
2017-03-31 21:33 ` Andrew Morton
2017-03-31 21:33 ` Andrew Morton
2017-04-01 0:04 ` Kees Cook
2017-04-01 0:04 ` Kees Cook
2017-04-03 3:40 ` Michael Ellerman
2017-04-03 3:40 ` Michael Ellerman
2017-04-03 14:03 ` Christoph Lameter
2017-04-03 14:03 ` Christoph Lameter
2017-04-03 14:53 ` Matthew Wilcox
2017-04-03 14:53 ` Matthew Wilcox
2017-04-04 11:30 ` Michal Hocko
2017-04-04 11:30 ` Michal Hocko
2017-04-04 15:07 ` Christoph Lameter
2017-04-04 15:07 ` Christoph Lameter
2017-04-04 15:16 ` Michal Hocko
2017-04-04 15:16 ` Michal Hocko
2017-04-04 15:46 ` Kees Cook
2017-04-04 15:46 ` Kees Cook
2017-04-04 15:58 ` Michal Hocko
2017-04-04 15:58 ` Michal Hocko
2017-04-04 16:02 ` Kees Cook
2017-04-04 16:02 ` Kees Cook
2017-04-04 19:13 ` Christoph Lameter
2017-04-04 19:13 ` Christoph Lameter
2017-04-04 19:42 ` Michal Hocko
2017-04-04 19:42 ` Michal Hocko
2017-04-04 19:58 ` Christoph Lameter
2017-04-04 19:58 ` Christoph Lameter
2017-04-04 20:13 ` Michal Hocko
2017-04-04 20:13 ` Michal Hocko
2017-04-11 4:58 ` Kees Cook
2017-04-11 4:58 ` Kees Cook
2017-04-11 13:46 ` Michal Hocko
2017-04-11 13:46 ` Michal Hocko
2017-04-11 14:14 ` Kees Cook
2017-04-11 14:14 ` Kees Cook
2017-04-11 14:19 ` Michal Hocko
2017-04-11 14:19 ` Michal Hocko
2017-04-11 16:05 ` Kees Cook
2017-04-11 16:05 ` Kees Cook
2017-04-11 16:16 ` Christoph Lameter
2017-04-11 16:16 ` Christoph Lameter
2017-04-11 16:19 ` Kees Cook
2017-04-11 16:19 ` Kees Cook
2017-04-11 16:23 ` Christoph Lameter
2017-04-11 16:23 ` Christoph Lameter
2017-04-11 16:30 ` Kees Cook
2017-04-11 16:30 ` Kees Cook
2017-04-11 16:26 ` Christoph Lameter
2017-04-11 16:26 ` Christoph Lameter
2017-04-11 16:41 ` Michal Hocko
2017-04-11 16:41 ` Michal Hocko
2017-04-11 18:03 ` Christoph Lameter
2017-04-11 18:03 ` Christoph Lameter
2017-04-11 18:30 ` Michal Hocko
2017-04-11 18:30 ` Michal Hocko
2017-04-11 18:44 ` Christoph Lameter
2017-04-11 18:44 ` Christoph Lameter
2017-04-11 18:55 ` Michal Hocko
2017-04-11 18:55 ` Michal Hocko
2017-04-11 18:59 ` Christoph Lameter
2017-04-11 18:59 ` Christoph Lameter
2017-04-11 19:39 ` Michal Hocko
2017-04-11 19:39 ` Michal Hocko
2017-04-17 15:22 ` Christoph Lameter
2017-04-17 15:22 ` Christoph Lameter
2017-04-18 6:41 ` Michal Hocko
2017-04-18 6:41 ` Michal Hocko
2017-04-18 13:31 ` Christoph Lameter
2017-04-18 13:31 ` Christoph Lameter
2017-04-18 13:37 ` Christoph Lameter [this message]
2017-04-18 13:37 ` Christoph Lameter
2017-04-28 1:11 ` Kees Cook
2017-04-28 1:11 ` Kees Cook
2017-04-28 6:16 ` Michal Hocko
2017-04-28 6:16 ` Michal Hocko
2017-04-27 12:06 ` Michal Hocko
2017-04-27 12:06 ` Michal Hocko
2017-04-11 18:30 ` Christoph Lameter
2017-04-11 18:30 ` Christoph Lameter
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