[GIT PULL] hotfixes for 6.3-rc6

[Andrew Morton <akpm@linux-foundation.org>]

Linus, please merge another batch of hotfixes, thanks.


The following changes since commit 197b6b60ae7bc51dd0814953c562833143b292aa:

  Linux 6.3-rc4 (2023-03-26 14:40:20 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm tags/mm-hotfixes-stable-2023-04-07-16-23

for you to fetch changes up to c45ea315a602d45569b08b93e9ab30f6a63a38aa:

  maple_tree: fix a potential concurrency bug in RCU mode (2023-04-05 18:06:25 -0700)

----------------------------------------------------------------
28 hotfixes.

23 are cc:stable and the other 5 address issues which were introduced
during this merge cycle.

20 are for MM and the remainder are for other subsystems.

----------------------------------------------------------------
Alistair Popple (1):
      mm: take a page reference when removing device exclusive entries

Florian Fainelli (1):
      mailmap: add an entry for Leonard Crestez

Leonard Göhrs (1):
      .mailmap: add entry for Leonard Göhrs

Liam Howlett (4):
      maple_tree: be more cautious about dead nodes
      maple_tree: detect dead nodes in mas_start()
      maple_tree: fix freeing of nodes in rcu mode
      maple_tree: remove extra smp_wmb() from mas_dead_leaves()

Liam R. Howlett (4):
      maple_tree: fix write memory barrier of nodes once dead for RCU mode
      maple_tree: add smp_rmb() to dead node detection
      maple_tree: add RCU lock checking to rcu callback functions
      mm: enable maple tree RCU mode by default

Muchun Song (2):
      mm: kfence: fix PG_slab and memcg_data clearing
      mm: kfence: fix handling discontiguous page

Peng Zhang (2):
      maple_tree: fix get wrong data_end in mtree_lookup_walk()
      maple_tree: fix a potential concurrency bug in RCU mode

Peter Xu (1):
      mm/hugetlb: fix uffd wr-protection for CoW optimization path

Rongwei Wang (1):
      mm/swap: fix swap_info_struct race between swapoff and get_swap_pages()

Ryusuke Konishi (2):
      nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread()
      nilfs2: fix sysfs interface lifetime

Sergey Senozhatsky (2):
      zsmalloc: document new fullness grouping
      zsmalloc: document freeable stats

Shiyang Ruan (3):
      fsdax: unshare: zero destination if srcmap is HOLE or UNWRITTEN
      fsdax: dedupe should compare the min of two iters' length
      fsdax: force clear dirty mark if CoW

Tetsuo Handa (1):
      nilfs2: initialize "struct nilfs_binfo_dat"->bi_pad field

Tiezhu Yang (1):
      lib/Kconfig.debug: correct help info of LOCKDEP_STACK_TRACE_HASH_BITS

Yafang Shao (1):
      mm: vmalloc: avoid warn_alloc noise caused by fatal signal

ye xingchen (1):
      Kconfig.debug: fix SCHED_DEBUG dependency

 .mailmap                         |   2 +
 Documentation/mm/zsmalloc.rst    | 135 ++++++++++--------
 fs/dax.c                         |  52 ++++++-
 fs/nilfs2/btree.c                |   1 +
 fs/nilfs2/direct.c               |   1 +
 fs/nilfs2/segment.c              |   3 +-
 fs/nilfs2/super.c                |   2 +
 fs/nilfs2/the_nilfs.c            |  12 +-
 include/linux/mm_types.h         |   3 +-
 kernel/fork.c                    |   3 +
 lib/Kconfig.debug                |   4 +-
 lib/maple_tree.c                 | 287 ++++++++++++++++++++++++++-------------
 mm/hugetlb.c                     |  14 +-
 mm/kfence/core.c                 |  32 ++---
 mm/memory.c                      |  16 ++-
 mm/mmap.c                        |   3 +-
 mm/swapfile.c                    |   3 +-
 mm/vmalloc.c                     |   8 +-
 tools/testing/radix-tree/maple.c |  16 +++
 19 files changed, 402 insertions(+), 195 deletions(-)