net: fix "queues" uevent between network namespaces

When I create a new namespace with 'ip netns add net0', or add/remove
new links in a namespace with 'ip link add/delete type veth', rx/tx
queues events can be got in all namespaces. That is because rx/tx queue
ktypes do not have namespace support, and their kobj parents are setted to
NULL. This patch is to fix it.

Reported-by: Libo Chen <chenlibo@huawei.com>
Signed-off-by: Libo Chen <chenlibo@huawei.com>
Signed-off-by: Weilong Chen <chenweilong@huawei.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 2 deletions

diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 52e5abbc41db..5f72767ddd9b 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -88,11 +88,17 @@ out:
 #ifdef CONFIG_NET
 static int kobj_bcast_filter(struct sock *dsk, struct sk_buff *skb, void *data)
 {
-        struct kobject *kobj = data;
+        struct kobject *kobj = data, *ksobj;
         const struct kobj_ns_type_operations *ops;
 
         ops = kobj_ns_ops(kobj);
-        if (ops) {
+        if (!ops && kobj->kset) {
+                ksobj = &kobj->kset->kobj;
+                if (ksobj->parent != NULL)
+                        ops = kobj_ns_ops(ksobj->parent);
+        }
+
+        if (ops && ops->netlink_ns && kobj->ktype->namespace) {
                 const void *sock_ns, *ns;
                 ns = kobj->ktype->namespace(kobj);
                 sock_ns = ops->netlink_ns(dsk);