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[ Upstream commit f1553c9894b4dbeb10a2ab15ab1aa113b3b4047c ] Several places call ip6mr_get_table() with no RCU nor RTNL lock. Add RCU protection inside such helper and provide a lockless variant for the few callers that already acquired the relevant lock. Note that some users additionally reference the table outside the RCU lock. That is actually safe as the table deletion can happen only after all table accesses are completed. Fixes:e2d57766e6("net: Provide compat support for SIOCGETMIFCNT_IN6 and SIOCGETSGCNT_IN6.") Fixes:d7c31cbde4("net: ip6mr: add RTM_GETROUTE netlink op") Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: Paolo Abeni <pabeni@redhat.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.