diff options
| author |   Xiao Liang <shaw.leon@gmail.com> | 2025-02-19 20:50:30 +0800 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2025-02-21 15:28:02 -0800 |
| commit | 3533717581dd72c9559b508e0feaede426d825aa (patch) | |
| tree | 49c880ef3eb474f7a692ed0acff5a1464924c520 /net/ieee802154/6lowpan/core.c | |
| parent | net: Use link/peer netns in newlink() of rtnl_link_ops (diff) | |
| download | wireguard-linux-3533717581dd72c9559b508e0feaede426d825aa.tar.xz wireguard-linux-3533717581dd72c9559b508e0feaede426d825aa.zip | |
ieee802154: 6lowpan: Validate link netns in newlink() of rtnl_link_ops
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@gmail.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250219125039.18024-5-shaw.leon@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | net/ieee802154/6lowpan/core.c | 2 |
1 files changed, 2 insertions, 0 deletions
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) |