net: use loopback dev when generating blackhole route

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Existing ipv4/6_blackhole_route() code generates a blackhole route
with dst->dev pointing to the passed in dst->dev.
It is not necessary to hold reference to the passed in dst->dev
because the packets going through this route are dropped anyway.
A loopback interface is good enough so that we don't need to worry about
releasing this dst->dev when this dev is going down.

Signed-off-by: Wei Wang <weiwan@google.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Wei Wang 2017-06-17 10:42:26 -07:00 • committed by David S. Miller

parent d24406c85d

commit 1dbe32525e

2 changed files with 6 additions and 5 deletions

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2

net/ipv4/route.c

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9

net/ipv6/route.c

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