Re: [PATCH net-next v9 04/11] ieee802154: 6lowpan: Validate link netns in newlink() of rtnl_link_ops
From: Kuniyuki Iwashima <hidden>
Date: 2025-02-13 05:49:17
Also in:
batman, bpf, bridge, linux-can, linux-kselftest, linux-rdma, linux-wireless, lkml
From: Xiao Liang <redacted> Date: Mon, 10 Feb 2025 21:29:55 +0800
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 <redacted>
Reviewed-by: Kuniyuki Iwashima <redacted>