Patch "ip6_gre: release cached dst on tunnel removal" has been added to the 4.1-stable tree

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This is a note to let you know that I've just added the patch titled

    ip6_gre: release cached dst on tunnel removal

to the 4.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ip6_gre-release-cached-dst-on-tunnel-removal.patch
and it can be found in the queue-4.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From foo@baz Wed Sep 30 05:18:31 CEST 2015
From: huaibin Wang <huaibin.wang@xxxxxxxxx>
Date: Tue, 25 Aug 2015 16:20:34 +0200
Subject: ip6_gre: release cached dst on tunnel removal

From: huaibin Wang <huaibin.wang@xxxxxxxxx>

[ Upstream commit d4257295ba1b389c693b79de857a96e4b7cd8ac0 ]

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@xxxxxxx>
Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Signed-off-by: huaibin Wang <huaibin.wang@xxxxxxxxx>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/ipv6/ip6_gre.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -361,6 +361,7 @@ static void ip6gre_tunnel_uninit(struct
 	struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id);
 
 	ip6gre_tunnel_unlink(ign, t);
+	ip6_tnl_dst_reset(t);
 	dev_put(dev);
 }
 


Patches currently in stable-queue which might be from huaibin.wang@xxxxxxxxx are

queue-4.1/ip6_gre-release-cached-dst-on-tunnel-removal.patch
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