Device denoted by IFLA_LINK is in link_net (IFLA_LINK_NETNSID) or source netns by design, but 6lowpan uses dev_net. Note dev->netns_local is set to true and currently link_net is implemented via a netns change. These together effectively reject IFLA_LINK_NETNSID. This patch adds a validation to ensure link_net is either NULL or identical to dev_net. Thus it would be fine to continue using dev_net when rtnetlink core begins to create devices directly in target netns. Signed-off-by: Xiao Liang <shaw.leon@xxxxxxxxx> --- net/ieee802154/6lowpan/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c index 704bf9e3f097..ee318d46817d 100644 --- a/net/ieee802154/6lowpan/core.c +++ b/net/ieee802154/6lowpan/core.c @@ -143,6 +143,8 @@ static int lowpan_newlink(struct net_device *ldev, if (!tb[IFLA_LINK]) return -EINVAL; + if (params->link_net && !net_eq(params->link_net, dev_net(ldev))) + return -EINVAL; /* find and hold wpan device */ wdev = dev_get_by_index(dev_net(ldev), nla_get_u32(tb[IFLA_LINK])); if (!wdev) -- 2.47.1
