linux-kernel - [PATCH v3 0/2] Add bounds check for Hotplugged memory

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Message-Id: <20190917010752.28395-1-alastair@au1.ibm.com>
Date:   Tue, 17 Sep 2019 11:07:46 +1000
From:   "Alastair D'Silva" <alastair@....ibm.com>
To:     alastair@...ilva.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.com>,
        Michal Hocko <mhocko@...e.com>,
        Pavel Tatashin <pasha.tatashin@...een.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Wei Yang <richard.weiyang@...il.com>, Qian Cai <cai@....pw>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Logan Gunthorpe <logang@...tatee.com>,
        Ira Weiny <ira.weiny@...el.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/2] Add bounds check for Hotplugged memory

From: Alastair D'Silva <alastair@...ilva.org>

This series adds bounds checks for hotplugged memory, ensuring that
it is within the physically addressable range (for platforms that
define MAX_(POSSIBLE_)PHYSMEM_BITS.

This allows for early failure, rather than attempting to access
bogus section numbers.

Changelog:
 V3:
   - Perform the addressable check before we take the hotplug lock
 V2:
   - Don't use MAX_POSSIBLE_PHYSMEM_BITS as it's wider that what
     may be available

Alastair D'Silva (2):
  memory_hotplug: Add a bounds check to check_hotplug_memory_range()
  mm: Add a bounds check in devm_memremap_pages()

 include/linux/memory_hotplug.h |  1 +
 mm/memory_hotplug.c            | 13 ++++++++++++-
 mm/memremap.c                  |  5 +++++
 3 files changed, 18 insertions(+), 1 deletion(-)

-- 
2.21.0