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70e5b8f445
Before commit1e58252e33("mwifiex: Fix heap overflow in mmwifiex_process_tdls_action_frame()"), mwifiex_process_tdls_action_frame() already had too many magic numbers. But this commit just added a ton more, in the name of checking for buffer overflows. That seems like a really bad idea. Let's make these magic numbers a little less magic, by (a) factoring out 'pos[1]' as 'ie_len' (b) using 'sizeof' on the appropriate source or destination fields where possible, instead of bare numbers (c) dropping redundant checks, per below. Regarding redundant checks: the beginning of the loop has this: if (pos + 2 + pos[1] > end) break; but then individual 'case's include stuff like this: if (pos > end - 3) return; if (pos[1] != 1) return; Note that the second 'return' (validating the length, pos[1]) combined with the above condition (ensuring 'pos + 2 + length' doesn't exceed 'end'), makes the first 'return' (whose 'if' can be reworded as 'pos > end - pos[1] - 2') redundant. Rather than unwind the magic numbers there, just drop those conditions. Fixes:1e58252e33("mwifiex: Fix heap overflow in mmwifiex_process_tdls_action_frame()") Signed-off-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Kalle Valo <kvalo@codeaurora.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.