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[ Upstream commitea1300b9df] mptcp_token_get_sock() may return a mptcp socket that is in a different net namespace than the socket that received the token value. The mptcp syncookie code path had an explicit check for this, this moves the test into mptcp_token_get_sock() function. Eventually token.c should be converted to pernet storage, but such change is not suitable for net tree. Fixes:2c5ebd001d("mptcp: refactor token container") Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.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.