This is a note to let you know that I've just added the patch titled
ipv6: don't call addrconf_dst_alloc again when enable lo
to the 3.4-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:
ipv6-don-t-call-addrconf_dst_alloc-again-when-enable-lo.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cb6bdbd023b7275fd30f88bfd6c3531f677850b1 Mon Sep 17 00:00:00 2001
From: Gao feng <gaofeng@xxxxxxxxxxxxxx>
Date: Sun, 16 Jun 2013 11:14:30 +0800
Subject: ipv6: don't call addrconf_dst_alloc again when enable lo
From: Gao feng <gaofeng@xxxxxxxxxxxxxx>
[ Upstream commit a881ae1f625c599b460cc8f8a7fcb1c438f699ad ]
If we disable all of the net interfaces, and enable
un-lo interface before lo interface, we already allocated
the addrconf dst in ipv6_add_addr. So we shouldn't allocate
it again when we enable lo interface.
Otherwise the message below will be triggered.
unregister_netdevice: waiting for sit1 to become free. Usage count = 1
This problem is introduced by commit 25fb6ca4ed9cad72f14f61629b68dc03c0d9713f
"net IPv6 : Fix broken IPv6 routing table after loopback down-up"
Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv6/addrconf.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2429,6 +2429,9 @@ static void init_loopback(struct net_dev
if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
continue;
+ if (sp_ifa->rt)
+ continue;
+
sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);
/* Failure cases are ignored */
Patches currently in stable-queue which might be from gaofeng@xxxxxxxxxxxxxx are
queue-3.4/ipv6-don-t-call-addrconf_dst_alloc-again-when-enable-lo.patch
queue-3.4/ipv6-ip6_append_data_mtu-did-not-care-about-pmtudisc-and-frag_size.patch
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