ipv6: automatically enable stable privacy mode if stable_secret set

[ Upstream commit 9b29c6962b70f232cde4076b1020191e1be0889d ]

Bjørn reported that while we switch all interfaces to privacy stable mode
when setting the secret, we don't set this mode for new interfaces. This
does not make sense, so change this behaviour.

Fixes: 622c81d57b392cc ("ipv6: generation of stable privacy addresses for link-local and autoconf")
Reported-by: Bjørn Mork <bjorn@mork.no>
Cc: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index ff873c84e450e589ca21ec574309fea955a26da5..ddd351145deac6bc1d05d544ad50cce3cf10b990 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -349,6 +349,12 @@ static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
        setup_timer(&ndev->rs_timer, addrconf_rs_timer,
                    (unsigned long)ndev);
        memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
+
+       if (ndev->cnf.stable_secret.initialized)
+               ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
+       else
+               ndev->addr_gen_mode = IN6_ADDR_GEN_MODE_EUI64;
+
        ndev->cnf.mtu6 = dev->mtu;
        ndev->cnf.sysctl = NULL;
        ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);