3.5.7.18 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Gao feng <gaofeng@xxxxxxxxxxxxxx> commit a881ae1f625c599b460cc8f8a7fcb1c438f699ad upstream. 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: Luis Henriques <luis.henriques@xxxxxxxxxxxxx> --- net/ipv6/addrconf.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 449df3f..c126b0a 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2432,6 +2432,9 @@ static void init_loopback(struct net_device *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 */ -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html