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Jens Axboe 44d282796f io_uring: only allow submit from owning task
If the credentials or the mm doesn't match, don't allow the task to
submit anything on behalf of this ring. The task that owns the ring can
pass the file descriptor to another task, but we don't want to allow
that task to submit an SQE that then assumes the ring mm and creds if
it needs to go async.

Cc: stable@vger.kernel.org
Suggested-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-01-16 21:43:24 -07:00
Documentation Devicetree fixes for v5.5: 2019-12-13 15:03:25 -08:00
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arch nios2 update for v5.2-rc2 2019-12-13 15:05:00 -08:00
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drivers Devicetree fixes for v5.5: 2019-12-13 15:03:25 -08:00
fs io_uring: only allow submit from owning task 2020-01-16 21:43:24 -07:00
include Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-12-13 14:45:40 -08:00
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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.