[PATCH net-next v10 04/13] ieee802154: 6lowpan: Validate link netns in newlink() of rtnl_link_ops
Xiao Liang <[email protected]>
| Newsgroups | org.kernel.vger.linux-ppp,com.zx2c4.lists.wireguard,dev.linux.lists.bridge,org.kernel.vger.bpf,org.kernel.vger.linux-can,org.kernel.vger.linux-kernel,org.kernel.vger.linux-kselftest,org.kernel.vger.linux-rdma,org.kernel.vger.linux-wireless,org.kernel.vger.linux-wpan,org.kernel.vger.netdev,org.open-mesh.lists.batman |
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| Message-ID | <[email protected]> |
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 <[email protected]> Reviewed-by: Kuniyuki Iwashima <[email protected]> --- 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) -- 2.48.1