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Reading other running task's stack can be a dangerous endeavor. Kasan stack memory access instrumentation includes special prologue and epilogue to mark/remove red zones in shadow memory between stack variables. For that reason there is always a race between a task reading value in other task's stack and that other task returning from a function and entering another one generating different red zones pattern. To avoid kasan reports simply perform uninstrumented memory reads. Acked-by: Ilya Leoshkevich <iii@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.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 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.