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Nikolay Aleksandrov says: ==================== net: bridge: multicast: fix automatic router port marking races While working on per-vlan multicast snooping I found two race conditions when multicast snooping is enabled. They're identical and happen when the router port list is modified without the multicast lock. One requires a PIM hello message to be received on a port and the other an MRD advertisement. To fix them we just need to take the multicast_lock when adding the ports to the router port list (marking them as router ports). Tested on an affected setup by generating the required packets while modifying the port list in parallel. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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.