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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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Gui-Dong Han
f3cb23e1fc
[ Upstream commit007be4327e] Simply copying shared data to a local variable cannot prevent data races. The compiler is allowed to optimize away the local copy and re-read the shared memory, causing a Time-of-Check Time-of-Use (TOCTOU) issue if the data changes between the check and the usage. To enforce the use of the local variable, use READ_ONCE() when reading the shared data and WRITE_ONCE() when updating it. Apply these macros to the three identified locations (curr_sense, adc, and fault) where local variables are used for error validation, ensuring the value remains consistent. Reported-by: Ben Hutchings <ben@decadent.org.uk> Closes: https://lore.kernel.org/all/6fe17868327207e8b850cf9f88b7dc58b2021f73.camel@decadent.org.uk/ Fixes:f5bae2642e("hwmon: Driver for MAX16065 System Manager and compatibles") Fixes:b8d5acdcf5("hwmon: (max16065) Use local variable to avoid TOCTOU") Cc: stable@vger.kernel.org Signed-off-by: Gui-Dong Han <hanguidong02@gmail.com> Link: https://lore.kernel.org/r/20260203121443.5482-1-hanguidong02@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> 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.
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.