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e06aa2e94f
By default, kernel threads have init_fs and init_files assigned. In the past, this has triggered security problems, as commands that don't ask for (and hence don't get assigned) fs/files from the originating task can then attempt path resolution etc with access to parts of the system they should not be able to. Rather than add checks in the fs code for misuse, just set these to NULL. If we do attempt to use them, then the resulting code will oops rather than provide access to something that it should not permit. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.