diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_xmit.c | 46 |
1 files changed, 36 insertions, 10 deletions
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c index f861d116cc33..4389bfe3050d 100644 --- a/net/netfilter/ipvs/ip_vs_xmit.c +++ b/net/netfilter/ipvs/ip_vs_xmit.c @@ -294,6 +294,12 @@ static inline bool decrement_ttl(struct netns_ipvs *ipvs, return true; } +/* rt has device that is down */ +static bool rt_dev_is_down(const struct net_device *dev) +{ + return dev && !netif_running(dev); +} + /* Get route to destination or remote server */ static int __ip_vs_get_out_rt(struct netns_ipvs *ipvs, int skb_af, struct sk_buff *skb, @@ -309,9 +315,11 @@ __ip_vs_get_out_rt(struct netns_ipvs *ipvs, int skb_af, struct sk_buff *skb, if (dest) { dest_dst = __ip_vs_dst_check(dest); - if (likely(dest_dst)) + if (likely(dest_dst)) { rt = dst_rtable(dest_dst->dst_cache); - else { + if (ret_saddr) + *ret_saddr = dest_dst->dst_saddr.ip; + } else { dest_dst = ip_vs_dest_dst_alloc(); spin_lock_bh(&dest->dst_lock); if (!dest_dst) { @@ -327,14 +335,22 @@ __ip_vs_get_out_rt(struct netns_ipvs *ipvs, int skb_af, struct sk_buff *skb, ip_vs_dest_dst_free(dest_dst); goto err_unreach; } - __ip_vs_dst_set(dest, dest_dst, &rt->dst, 0); + /* It is forbidden to attach dest->dest_dst if + * device is going down. + */ + if (!rt_dev_is_down(dst_dev_rcu(&rt->dst))) + __ip_vs_dst_set(dest, dest_dst, &rt->dst, 0); + else + noref = 0; spin_unlock_bh(&dest->dst_lock); IP_VS_DBG(10, "new dst %pI4, src %pI4, refcnt=%d\n", &dest->addr.ip, &dest_dst->dst_saddr.ip, rcuref_read(&rt->dst.__rcuref)); + if (ret_saddr) + *ret_saddr = dest_dst->dst_saddr.ip; + if (!noref) + ip_vs_dest_dst_free(dest_dst); } - if (ret_saddr) - *ret_saddr = dest_dst->dst_saddr.ip; } else { noref = 0; @@ -471,9 +487,11 @@ __ip_vs_get_out_rt_v6(struct netns_ipvs *ipvs, int skb_af, struct sk_buff *skb, if (dest) { dest_dst = __ip_vs_dst_check(dest); - if (likely(dest_dst)) + if (likely(dest_dst)) { rt = dst_rt6_info(dest_dst->dst_cache); - else { + if (ret_saddr) + *ret_saddr = dest_dst->dst_saddr.in6; + } else { u32 cookie; dest_dst = ip_vs_dest_dst_alloc(); @@ -494,14 +512,22 @@ __ip_vs_get_out_rt_v6(struct netns_ipvs *ipvs, int skb_af, struct sk_buff *skb, } rt = dst_rt6_info(dst); cookie = rt6_get_cookie(rt); - __ip_vs_dst_set(dest, dest_dst, &rt->dst, cookie); + /* It is forbidden to attach dest->dest_dst if + * device is going down. + */ + if (!rt_dev_is_down(dst_dev_rcu(&rt->dst))) + __ip_vs_dst_set(dest, dest_dst, &rt->dst, cookie); + else + noref = 0; spin_unlock_bh(&dest->dst_lock); IP_VS_DBG(10, "new dst %pI6, src %pI6, refcnt=%d\n", &dest->addr.in6, &dest_dst->dst_saddr.in6, rcuref_read(&rt->dst.__rcuref)); + if (ret_saddr) + *ret_saddr = dest_dst->dst_saddr.in6; + if (!noref) + ip_vs_dest_dst_free(dest_dst); } - if (ret_saddr) - *ret_saddr = dest_dst->dst_saddr.in6; } else { noref = 0; dst = __ip_vs_route_output_v6(net, daddr, ret_saddr, do_xfrm, |