net: fix netlink address dumping in IPv4/IPv6

When a dump is interrupted at the last device in a hash chain and
then continued, "idx" won't get incremented past s_idx, so s_ip_idx
is not reset when moving on to the next device. This means of all
following devices only the last n - s_ip_idx addresses are dumped.

Tested-by: Pawel Staszewski <pstaszewski@itcare.pl>
Signed-off-by: Patrick McHardy <kaber@trash.net>

2 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index 51ca946e3392..3feb2b390308 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -1194,7 +1194,7 @@ static int inet_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
                 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
                         if (idx < s_idx)
                                 goto cont;
-                        if (idx > s_idx)
+                        if (h > s_h || idx > s_idx)
                                 s_ip_idx = 0;
                         in_dev = __in_dev_get_rcu(dev);
                         if (!in_dev)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 3381b4317c27..7e567ae5eaab 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3610,7 +3610,7 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
                 hlist_for_each_entry_rcu(dev, node, head, index_hlist) {
                         if (idx < s_idx)
                                 goto cont;
-                        if (idx > s_idx)
+                        if (h > s_h || idx > s_idx)
                                 s_ip_idx = 0;
                         ip_idx = 0;
                         if ((idev = __in6_dev_get(dev)) == NULL)