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Filename Latest commit message Latest commit date
Ralph Campbell 86a2d59841 mm/hmm: fix race between hmm_mirror_unregister() and mmu_notifier callback
In hmm_mirror_unregister(), mm->hmm is set to NULL and then
mmu_notifier_unregister_no_release() is called.  That creates a small
window where mmu_notifier can call mmu_notifier_ops with mm->hmm equal to
NULL.  Fix this by first unregistering mmu notifier callbacks and then
setting mm->hmm to NULL.

Similarly in hmm_register(), set mm->hmm before registering mmu_notifier
callbacks so callback functions always see mm->hmm set.

Link: http://lkml.kernel.org/r/20181019160442.18723-4-jglisse@redhat.com
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-10-31 08:54:11 -07:00
arch The biggest change here is the updates to kprobes 2018-10-30 09:49:56 -07:00
block
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Documentation The biggest change here is the updates to kprobes 2018-10-30 09:49:56 -07:00
drivers xen: fixes for 4.20-rc1 2018-10-30 09:31:07 -07:00
firmware
fs for-4.20-part2-tag 2018-10-30 08:27:13 -07:00
include mm/hmm: fix utf8 ... 2018-10-31 08:54:11 -07:00
init
ipc
kernel The biggest change here is the updates to kprobes 2018-10-30 09:49:56 -07:00
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mm mm/hmm: fix race between hmm_mirror_unregister() and mmu_notifier callback 2018-10-31 08:54:11 -07:00
net
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tools The biggest change here is the updates to kprobes 2018-10-30 09:49:56 -07:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.