It fix the bug 67951 on bugzilla https://bugzilla.kernel.org/show_bug.cgi?id=67951 The patch can't be applied directly, as it' used the function introduced by "commit 94e187c0" ip6_rt_put(), that patch can't be applied directly either. ==================== From: Gao feng <gaofeng@xxxxxxxxxxxxxx> commit 33d99113b1102c2d2f8603b9ba72d89d915c13f5 upstream. This commit don't have a stable tag, but it fix the bug no reply after loopback down-up.It's very worthy to be applied to stable 3.4 kernels. The bug is 67951 on bugzilla https://bugzilla.kernel.org/show_bug.cgi?id=67951 CC: Sabrina Dubroca <sd@xxxxxxxxxxxxxxx> CC: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx> Reported-by: Weilong Chen <chenweilong@xxxxxxxxxx> Signed-off-by: Weilong Chen <chenweilong@xxxxxxxxxx> Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx> Acked-by: Hannes Frederic Sowa <hannes@xxxxxxxxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> [weilong: s/ip6_rt_put/dst_release] Signed-off-by: Chen Weilong <chenweilong@xxxxxxxxxx> --- net/ipv6/addrconf.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index abfa007..25399bf 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2435,8 +2435,18 @@ static void init_loopback(struct net_device *dev) if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) continue; - if (sp_ifa->rt) - continue; + if (sp_ifa->rt) { + /* This dst has been added to garbage list when + * lo device down, release this obsolete dst and + * reallocate a new router for ifa. + */ + if (sp_ifa->rt->dst.obsolete > 0) { + dst_release(&sp_ifa->rt->dst); + sp_ifa->rt = NULL; + } else { + continue; + } + } sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0); -- 1.7.12 -- 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