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commitf927767978upstream. The HVS global state functions return an error pointer, but in most cases we check if it's NULL, possibly resulting in an invalid pointer dereference. Fixes:9ec03d7f1e("drm/vc4: kms: Wait on previous FIFO users before a commit") Signed-off-by: Maxime Ripard <maxime@cerno.tech> Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Tested-by: Jian-Hong Pan <jhp@endlessos.org> Link: https://lore.kernel.org/r/20211117094527.146275-3-maxime@cerno.tech Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
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.