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This adds a selftest that tests the behavior when a freplace target program attempts to make a write access on a packet. The expectation is that the read or write access is granted based on the program type of the linked program and not itself (which is of type, for e.g., BPF_PROG_TYPE_EXT). This test fails without the associated patch on the verifier. Signed-off-by: Udip Pant <udippant@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200825232003.2877030-3-udippant@fb.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.