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[ Upstream commit5d6751eaff] The "ev->traffic_class" and "reply->ac" variables come from the network and they're used as an offset into the wmi->stream_exist_for_ac[] array. Those variables are u8 so they can be 0-255 but the stream_exist_for_ac[] array only has WMM_NUM_AC (4) elements. We need to add a couple bounds checks to prevent array overflows. I also modified one existing check from "if (traffic_class > 3) {" to "if (traffic_class >= WMM_NUM_AC) {" just to make them all consistent. Fixes:bdcd817079(" Add ath6kl cleaned up driver") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Signed-off-by: Sasha Levin <sashal@kernel.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.