Do the ax25_list_lock, ax25_dev_lock, linkfail_lockreally, ax25_frag_lock and
listen_lock have to be bh-safe?

Do the netrom and rose locks have to be bh-safe?

A device might be deleted after lookup in the SIOCADDRT ioctl but before it's
being used.

Routes to a device being taken down might be deleted by ax25_rt_device_down
but added by somebody else before the device has been deleted fully.

The ax25_rt_find_route synopsys is pervert but I somehow had to deal with
the race caused by the static variable in it's previous implementation.

Implement proper socket locking in netrom and rose.

Check socket locking when ax25_rcv is sending to raw sockets.  In particular
ax25_send_to_raw() seems fishy.  Heck - ax25_rcv is fishy.

Handle XID and TEST frames properly.
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<tr><th>author</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 16:38:39 -0500</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-30 16:38:39 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/tipc?id=0d29ed28da63dd893395c343c7e78b078de93ceb'>0d29ed28da63dd893395c343c7e78b078de93ceb</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/tipc?id=0d29ed28da63dd893395c343c7e78b078de93ceb'>patch</a>)</td></tr>
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<div class='commit-subject'>Merge tag 'linux-can-fixes-for-4.10-20170130' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can</div><div class='commit-msg'>Marc Kleine-Budde says:

====================
pull-request: can 2017-01-30

this is a pull request of one patch.

The patch is by Oliver Hartkopp and fixes the hrtimer/tasklet termination in
bcm op removal.
====================

Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
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