From: Jon Maloy
Date: Wed, 23 Nov 2016 21:05:26 -0500
> commit 817298102b0b ("tipc: fix link priority propagation") introduced a
> compatibility problem between TIPC versions newer than Linux 4.6 and
> those older than Linux 4.4. In versions later than 4.4, link STATE
>
commit 817298102b0b ("tipc: fix link priority propagation") introduced a
compatibility problem between TIPC versions newer than Linux 4.6 and
those older than Linux 4.4. In versions later than 4.4, link STATE
messages only contain a non-zero link priority value when the sender
wants the receiver
In commit d999297c3dbbe7fdd832f7fa4ec84301e170b3e6
(tipc: reduce locking scope during packet reception) we introduced
a new function tipc_link_proto_rcv(). This function contains a bug,
so that it sometimes by error sends out a non-zero link priority value
in created protocol messages.
The bug