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* [PATCH v2 0/2] mm: Don't access uninitialized memmaps in PFN walkers
@ 2019-10-09 14:24 David Hildenbrand
  2019-10-09 14:24 ` [PATCH v2 1/2] mm: Don't access uninitialized memmaps in fs/proc/page.c David Hildenbrand
  2019-10-09 14:24 ` [PATCH v2 2/2] mm/memory-failure.c: Don't access uninitialized memmaps in memory_failure() David Hildenbrand
  0 siblings, 2 replies; 20+ messages in thread
From: David Hildenbrand @ 2019-10-09 14:24 UTC (permalink / raw)
  To: linux-kernel
  Cc: linux-mm, David Hildenbrand, Alexey Dobriyan, Andrew Morton,
	Aneesh Kumar K.V, Anthony Yznaga, Dan Williams, Michal Hocko,
	Mike Rapoport, Naoya Horiguchi, Pankaj gupta, Qian Cai,
	Stephen Rothwell, Toshiki Fukasawa

This is the follow-up of:
  [PATCH v1] mm: Fix access of uninitialized memmaps in fs/proc/page.c

We have multiple places where we might access uninitialized memmaps and
trigger kernel BUGs. Make sure to only access initialized memmaps.

Some of these places got easier to trigger with:
  [PATCH v6 00/10] mm/memory_hotplug: Shrink zones before removing memory
As memmaps are now also poisoned when memory is offlined, before it is
actually removed.

v1 -> v2:
- Drop ZONE_DEVICE support from the /proc/k... files as requested by Michal
- Further simplify the code
- Split up into two patches

David Hildenbrand (2):
  mm: Don't access uninitialized memmaps in fs/proc/page.c
  mm/memory-failure.c: Don't access uninitialized memmaps in
    memory_failure()

 fs/proc/page.c      | 28 ++++++++++++++++------------
 mm/memory-failure.c | 14 ++++++++------
 2 files changed, 24 insertions(+), 18 deletions(-)

-- 
2.21.0



^ permalink raw reply	[flat|nested] 20+ messages in thread

end of thread, other threads:[~2019-10-21  9:44 UTC | newest]

Thread overview: 20+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-10-09 14:24 [PATCH v2 0/2] mm: Don't access uninitialized memmaps in PFN walkers David Hildenbrand
2019-10-09 14:24 ` [PATCH v2 1/2] mm: Don't access uninitialized memmaps in fs/proc/page.c David Hildenbrand
2019-10-09 14:41   ` Michal Hocko
2019-10-14  8:44   ` David Hildenbrand
2019-10-09 14:24 ` [PATCH v2 2/2] mm/memory-failure.c: Don't access uninitialized memmaps in memory_failure() David Hildenbrand
2019-10-09 14:43   ` Michal Hocko
2019-10-10  7:27     ` David Hildenbrand
2019-10-10  7:35       ` Michal Hocko
2019-10-10  7:52         ` David Hildenbrand
2019-10-10  7:58           ` David Hildenbrand
2019-10-11  6:02             ` Naoya Horiguchi
2019-10-11 10:13               ` David Hildenbrand
2019-10-14 13:36                 ` Michal Hocko
2019-10-15 14:23                   ` Oscar Salvador
2019-10-10  0:26   ` Naoya Horiguchi
2019-10-10  7:17     ` David Hildenbrand
2019-10-11  6:50       ` Naoya Horiguchi
2019-10-19  2:05       ` Andrew Morton
2019-10-21  9:44         ` David Hildenbrand
2019-10-14  8:41   ` David Hildenbrand

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