On 30.01.2018 23:03, Neil Horman wrote:

On Tue, Jan 30, 2018 at 09:24:17PM +0200, Tommi Rantala wrote:

quoted

On 30.01.2018 17:59, Neil Horman wrote:

quoted

On Mon, Jan 29, 2018 at 05:55:45PM +0200, Tommi Rantala wrote:

quoted

ip netns add TEST
ip netns exec TEST ip link set lo up
ip link add dummy0 type dummy
ip link add dummy1 type dummy
ip link add dummy2 type dummy
ip link set dev dummy0 netns TEST
ip link set dev dummy1 netns TEST
ip link set dev dummy2 netns TEST
ip netns exec TEST ip addr add 192.168.1.1/24 dev dummy0
ip netns exec TEST ip link set dummy0 up
ip netns exec TEST ip addr add 192.168.1.2/24 dev dummy1
ip netns exec TEST ip link set dummy1 up
ip netns exec TEST ip addr add 192.168.1.3/24 dev dummy2
ip netns exec TEST ip link set dummy2 up
ip netns exec TEST sctp_test -H 192.168.1.2 -P 20002 -h 192.168.1.1 -p 20000
-s -B 192.168.1.3
ip netns del TEST

Does the problem occur if you don't set lo up?

Still happens after dropping "ip netns exec TEST ip link set lo up".

Omitting "-B 192.168.1.3" from the sctp_test args helps.

Thats....wierd.  I'll look at the sctp_test code in the AM

I think there's a problem in the dst refcounting in sctp_v4_get_dst()

There's a dst_entry struct that has >0 refcnt after running the 
testcase, which makes it impossible to delete the loopback device, as 
that dst is never freed.

I'll try to make a patch.

Tommi