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Dmitry Safonov eeec26d5da time/namespace: Add max_time_namespaces ucount 
Michael noticed that userns limit for number of time namespaces is missing.

Furthermore, time namespace introduced UCOUNT_TIME_NAMESPACES, but didn't
introduce an array member in user_table[]. It would make array's
initialisation OOB write, but by luck the user_table array has an excessive
empty member (all accesses to the array are limited with UCOUNT_COUNTS - so
it silently reuses the last free member.

Fixes user-visible regression: max_inotify_instances by reason of the
missing UCOUNT_ENTRY() has limited max number of namespaces instead of the
number of inotify instances.

Fixes: 769071ac9f ("ns: Introduce Time Namespace")
Reported-by: Michael Kerrisk (man-pages) <mtk.manpages@gmail.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andrei Vagin <avagin@gmail.com>
Acked-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: stable@kernel.org
Link: https://lkml.kernel.org/r/20200406171342.128733-1-dima@arista.com
2020-04-07 12:37:21 +02:00
arch Additional ACPI updates for 5.7-rc1 2020-04-06 10:35:06 -07:00
block
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Documentation time/namespace: Add max_time_namespaces ucount 2020-04-07 12:37:21 +02:00
drivers Additional ACPI updates for 5.7-rc1 2020-04-06 10:35:06 -07:00
fs \n 2020-04-06 08:58:42 -07:00
include Additional ACPI updates for 5.7-rc1 2020-04-06 10:35:06 -07:00
init perf updates all over the place: 2020-04-05 12:26:24 -07:00
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kernel time/namespace: Add max_time_namespaces ucount 2020-04-07 12:37:21 +02:00
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MAINTAINERS powerpc updates for 5.7 2020-04-05 11:12:59 -07:00
Makefile
README

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.