| From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 081/102] ip6_gre: release cached dst on tunnel removal | Date | Tue, 22 Sep 2015 10:52:17 -0700 |
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3.19.8-ckt7 -stable review patch. If anyone has any objections, please let me know.
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From: huaibin Wang <huaibin.wang@6wind.com>
commit d4257295ba1b389c693b79de857a96e4b7cd8ac0 upstream.
When a tunnel is deleted, the cached dst entry should be released.
This problem may prevent the removal of a netns (seen with a x-netns IPv6 gre tunnel): unregister_netdevice: waiting for lo to become free. Usage count = 3
CC: Dmitry Kozlov <xeb@mail.ru> Fixes: c12b395a4664 ("gre: Support GRE over IPv6") Signed-off-by: huaibin Wang <huaibin.wang@6wind.com> Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- net/ipv6/ip6_gre.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 01ccc28..d1b83a3 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -361,6 +361,7 @@ static void ip6gre_tunnel_uninit(struct net_device *dev) struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id); ip6gre_tunnel_unlink(ign, t); + ip6_tnl_dst_reset(t); dev_put(dev); } -- 1.9.1
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