2c27ce9150
In the quest to remove all stack VLA usage from the kernel[1], this moves the stack buffer used during decompression to be allocated externally. The existing "dest_max_index" used in the VLA is bounded by cb_max_page. cb_max_page is bounded by max_page, and max_page is bounded by nr_pages. Since nr_pages is used for the "pages" allocation, it can similarly be used for the "completed_pages" allocation and passed into the decompression function. The error paths are updated to free the new allocation. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Link: http://lkml.kernel.org/r/20180626172909.41453-3-keescook@chromium.org Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Anton Altaparmakov <anton@tuxera.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.