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[ Upstream commitda64ae2d35] Use three-way comparison for address components to avoid integer wraparound in the result of xfrm_policy_addr_delta(). This ensures that the search trees are built and traversed correctly. Treat IPv4 and IPv6 similarly by returning 0 when prefixlen == 0. Prefix /0 has only one equivalence class. Fixes:9cf545ebd5("xfrm: policy: store inexact policies in a tree ordered by destination address") Signed-off-by: Visa Hankala <visa@hankala.org> Acked-by: Florian Westphal <fw@strlen.de> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> 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.