I've got a weird situation here. I have a route that the kernel knows
about, but won't display via the general RTM_GETROUTE call, but will
display if I query for that particular route:
# ip -4 route show | grep 108.61.171.x
# ip route get 108.61.171.x
108.61.171.x dev MYIF
cache
# cat /proc/net/route | grep 108.61.171.x
#
# cat /proc/net/route | grep -i 6c3dac
#
# ip route add 108.61.171.x dev MYIF
RTNETLINK answers: File exists
# ip route del 108.61.171.x <---- it deletes successfully once
# ip route del 108.61.171.x
RTNETLINK answers: No such process
This is on a machine running 4.1.3, but I have seen it on earlier
versions in the past.
I don't have great reproduction steps here, I've seen this 4-5 times in
the past few months (on different hardware). So far, I haven't really
found any way of fixing it (deleting and readding the route has no
effect). I thought at first this might be related to
e55ffaf457bcc8ec4e9d9f56f955971f834d65b3, but as far as I can tell that
only relates to /proc/net/route.
Any suggestions on further troubleshooting here? I'm all out of ideas
(and since I can't easily reproduce it yet, I can't reboot to a newer
kernel to see if it goes away)
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