diff options
| -rw-r--r-- | net/ipv6/addrconf.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 0677b9732d56..6fd4bbdc444f 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -1856,22 +1856,37 @@ int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, } EXPORT_SYMBOL(ipv6_chk_addr); +/* device argument is used to find the L3 domain of interest. If + * skip_dev_check is set, then the ifp device is not checked against + * the passed in dev argument. So the 2 cases for addresses checks are: + * 1. does the address exist in the L3 domain that dev is part of + * (skip_dev_check = true), or + * + * 2. does the address exist on the specific device + * (skip_dev_check = false) + */ int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr, const struct net_device *dev, bool skip_dev_check, int strict, u32 banned_flags) { unsigned int hash = inet6_addr_hash(net, addr); + const struct net_device *l3mdev; struct inet6_ifaddr *ifp; u32 ifp_flags; rcu_read_lock(); + l3mdev = l3mdev_master_dev_rcu(dev); if (skip_dev_check) dev = NULL; hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) { if (!net_eq(dev_net(ifp->idev->dev), net)) continue; + + if (l3mdev_master_dev_rcu(ifp->idev->dev) != l3mdev) + continue; + /* Decouple optimistic from tentative for evaluation here. * Ban optimistic addresses explicitly, when required. */ |