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After a 32-bit load followed by a branch, the verifier would reduce the maximum bound of the register to 0x7fffffff, allowing a user to bypass bound checks. Ensure such a program is rejected. In the second test, the 64-bit compare should not sufficient to determine whether the signed 32-bit lower bound is 0, so the verifier should reject the second branch. Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Alexei Starovoitov <ast@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.