From: Jon Maloy <redacted>
Date: Tue, 30 Jul 2019 20:19:10 +0200

Our test suite somtimes provokes the following crash:

Description of problem:

 ...

The reason is that the skb list tipc_socket::mc_method.deferredq only
is initialized for connectionless sockets, while nothing stops arriving
multicast messages from being filtered by connection oriented sockets,
with subsequent access to the said list.

We fix this by initializing the list unconditionally at socket creation.
This eliminates the crash, while the message still is dropped further
down in tipc_sk_filter_rcv() as it should be.

Reported-by: Li Shuang <redacted>
Signed-off-by: Jon Maloy <redacted>

Applied and queued up for -stable, thank you.