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c5925f4384
The "val->intval" variable is an integer which comes from the user. This
code has an upper bounds check but the lower bounds check was
accidentally omitted. The write_to_ec() take a u8 value as a parameter
so negative values would be truncated to positive values in the 0-255
range.
Return -EINVAL if the user passes a negative value.
Fixes: 202593d1e86b ("platform/x86: oxpec: Add charge threshold and behaviour to OneXPlayer")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Antheas Kapenekakis <lkml@antheas.dev>
Link: https://lore.kernel.org/r/aBSE71VKfBlQg_fZ@stanley.mountain
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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 reStructuredText 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.