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Groups > linux.kernel > #1625326

Re: [PATCH] mm: Add additional consistency check

From Christoph Lameter <cl@linux.com>
Newsgroups linux.kernel
Subject Re: [PATCH] mm: Add additional consistency check
Date 2017-04-18 15:40 +0200
Message-ID <txBwm-6Is-11@gated-at.bofh.it> (permalink)
References (6 earlier) <tv9bc-2lS-5@gated-at.bofh.it> <tv9bc-2lS-11@gated-at.bofh.it> <tv9NU-2Ow-13@gated-at.bofh.it> <txgLf-2iD-7@gated-at.bofh.it> <txv7z-2Ti-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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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Thread

Re: [PATCH] mm: Add additional consistency check Kees Cook <keescook@chromium.org> - 2017-04-11 07:00 +0200
  Re: [PATCH] mm: Add additional consistency check Michal Hocko <mhocko@kernel.org> - 2017-04-11 15:50 +0200
    Re: [PATCH] mm: Add additional consistency check Kees Cook <keescook@chromium.org> - 2017-04-11 16:20 +0200
      Re: [PATCH] mm: Add additional consistency check Michal Hocko <mhocko@kernel.org> - 2017-04-11 16:30 +0200
        Re: [PATCH] mm: Add additional consistency check Kees Cook <keescook@chromium.org> - 2017-04-11 18:10 +0200
        Re: [PATCH] mm: Add additional consistency check Kees Cook <keescook@chromium.org> - 2017-04-11 18:20 +0200
          Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-11 18:30 +0200
          Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-11 18:30 +0200
            Re: [PATCH] mm: Add additional consistency check Kees Cook <keescook@chromium.org> - 2017-04-11 18:40 +0200
        Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-11 18:20 +0200
          Re: [PATCH] mm: Add additional consistency check Michal Hocko <mhocko@kernel.org> - 2017-04-11 18:50 +0200
            Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-11 20:10 +0200
              Re: [PATCH] mm: Add additional consistency check Michal Hocko <mhocko@kernel.org> - 2017-04-11 20:40 +0200
                Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-11 20:50 +0200
                Re: [PATCH] mm: Add additional consistency check Michal Hocko <mhocko@kernel.org> - 2017-04-11 21:00 +0200
                Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-11 21:00 +0200
                Re: [PATCH] mm: Add additional consistency check Michal Hocko <mhocko@kernel.org> - 2017-04-11 21:40 +0200
                Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-17 17:30 +0200
                Re: [PATCH] mm: Add additional consistency check Michal Hocko <mhocko@kernel.org> - 2017-04-18 08:50 +0200
                Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-18 15:40 +0200
                Re: [PATCH] mm: Add additional consistency check Christoph Lameter <cl@linux.com> - 2017-04-18 15:40 +0200

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