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f185de2b4e
Commit 5ad6300524 ("genetlink: disallow subscribing to unknown
mcast groups") disallows userspace to subscribe to groups that don't
exist in kernel. As a result, communication between processes is
not possible unless they explicitly register a dummy group with the
kernel even if the communication is between userspace processes
only. NETLINK_USERSOCK cannot be used here since userspace processes
would require CAP_NET_ADMIN to receive multicast messages which
is available for priveleged processes only.
Fix this problem by reverting the change till a solution is
determined internally and upstream discussion.
Bug: 158311262
CRs-Fixed: 2086060
Change-Id: Id559d9ef9d1e0a25e3bbdc81503978f01c6ed85f
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
(cherry-picked from commit 047570fa7c5dde6fe17923f5e5fa48b5e6e80203)
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: Id559d9ef9d1e0a25e3bbdc81503978f01c6ed85f
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.