linux-kernel - [GIT PULL] Rare page cache data corruption fix

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Date:   Fri, 22 Apr 2022 20:45:35 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org
Subject: [GIT PULL] Rare page cache data corruption fix

Syzbot found a nasty race between large page splitting and page lookup.
Details in the commit log, but fortunately it has a reliable reproducer.
I thought it better to send this one to you straight away.

The other commit fixes the test suite build, again.

The following changes since commit 281b9d9a4b02229b602a14f7540206b0fbe4134f:

  Merge branch 'akpm' (patches from Andrew) (2022-04-22 10:10:43 -0700)

are available in the Git repository at:

  git://git.infradead.org/users/willy/xarray.git tags/xarray-5.18a

for you to fetch changes up to 63b1898fffcd8bd81905b95104ecc52b45a97e21:

  XArray: Disallow sibling entries of nodes (2022-04-22 15:35:40 -0400)

----------------------------------------------------------------
XArray: Two fixes for 5.18

 - Fix the test suite build for kmem_cache_alloc_lru()

 - Fix a rare race between split and load

----------------------------------------------------------------
Matthew Wilcox (Oracle) (2):
      tools: Add kmem_cache_alloc_lru()
      XArray: Disallow sibling entries of nodes

 lib/xarray.c                     | 2 ++
 tools/include/linux/slab.h       | 8 +++++++-
 tools/testing/radix-tree/linux.c | 3 ++-
 3 files changed, 11 insertions(+), 2 deletions(-)