Re: ip netns del zaps wg link
15.07.2023 00:48, Harry G Coin wrote: .. [] allowing wireguard interfaces to behave like all other interfaces when a namespace is destroyed (moving back to the namespace where it was born and to which it retains connection anyhow) The thing is that all interface types behave like this when a network namespace is removed: they're destroyed together with the namespace. All which can be deleted anyway, for which an `ip link del' command works, - like, physical NICs are the only exception here b/c you can't remove a physical NIC from a physical machine this way. So in this context, wg interfaces are *already* behaving like all other virtual interfaces, and this is done by linux network/namespace subsystem, not by wireguard. /mjt
Re: ip netns del zaps wg link
On 7/14/23 05:27, Maarten de Vries wrote: On 18/05/2023 01:13, Harry G Coin wrote: First, Hi and thanks for all the effort! At least on Ubuntu latest LTS: As advertised, if a wireguard link gets created by systemd/networkd, then set into a different net namespace, all works well. However, if that namespace is deleted, the link appears to be 'gone forever'. Other link types reappear in the primary namespace when the namespace they are in gets deleted. I'm not sure whether the link retains its 'up' or 'down' state when the namespace it's in gets deleted and reset to primary. Not a big deal, doesn't happen often. This is 100% repeatable. Some other answer than 'inaccessible until the next reboot' would be nice. Hi, This behavior is exactly what I would expect. I'm using namespaces to restrict access to a wireguard link. If the namespace gets destroyed, I absolutely do not want other programs to have access to the wireguard link. You can simply re-create the wireguard link to use it again. This may not be the most convenient for you, but your use case seems to be a bit unconventional: you are moving and deleting a resource created by systemd and/or networkd manually. You are mixing automatic and manual management, so there is a risk of breaking the automatic management. Alternatively, you could move the interface back before deleting the namespace. Kind regards, Maarten de Vries Hi, It's worth thinking about the only means by which a namespace 'gets destroyed'. The point of systemd/networkd for most of us is similarity and convenience and uniformity in initialization across interface device types. That frees later choices in nic management to involve only the detail specific to those choices. Remember systemd/networkd (can be just one-and-done setup time management) is a very different thing than NetworkManager (Automatic active ongoing management). Someday I hope systemd/networkd adds namespace comprehension. As wireguard and namespaces management are both limited to the root user, who presumably is aware of the security implications involved, and wireguard's birth in the initial namespace is a selling point no matter how it moves among namespaces later: allowing wireguard interfaces to behave like all other interfaces when a namespace is destroyed (moving back to the namespace where it was born and to which it retains connection anyhow) avoids imposing further 'wireguard only' admin burden. It might be convenient to automatically set the wireguard link 'down' as the interface transitions back from the namespace being destroyed to the primary so as to avoid any possibility of overlapping existing entries in the primary routing table. But destroying the interface altogether generates admin burden beyond need. Thanks for all the wireguard work! Harry Coin
Re: ip netns del zaps wg link
On 18/05/2023 01:13, Harry G Coin wrote: First, Hi and thanks for all the effort! At least on Ubuntu latest LTS: As advertised, if a wireguard link gets created by systemd/networkd, then set into a different net namespace, all works well. However, if that namespace is deleted, the link appears to be 'gone forever'. Other link types reappear in the primary namespace when the namespace they are in gets deleted. I'm not sure whether the link retains its 'up' or 'down' state when the namespace it's in gets deleted and reset to primary. Not a big deal, doesn't happen often. This is 100% repeatable. Some other answer than 'inaccessible until the next reboot' would be nice. Hi, This behavior is exactly what I would expect. I'm using namespaces to restrict access to a wireguard link. If the namespace gets destroyed, I absolutely do not want other programs to have access to the wireguard link. You can simply re-create the wireguard link to use it again. This may not be the most convenient for you, but your use case seems to be a bit unconventional: you are moving and deleting a resource created by systemd and/or networkd manually. You are mixing automatic and manual management, so there is a risk of breaking the automatic management. Alternatively, you could move the interface back before deleting the namespace. Kind regards, Maarten de Vries
[syzbot] Monthly wireguard report (Jul 2023)
Hello wireguard maintainers/developers, This is a 31-day syzbot report for the wireguard subsystem. All related reports/information can be found at: https://syzkaller.appspot.com/upstream/s/wireguard During the period, 0 new issues were detected and 0 were fixed. In total, 3 issues are still open and 13 have been fixed so far. Some of the still happening issues: Ref Crashes Repro Title <1> 714 NoKCSAN: data-race in wg_packet_send_staged_packets / wg_packet_send_staged_packets (3) https://syzkaller.appspot.com/bug?extid=6ba34f16b98fe40daef1 <2> 480 NoKCSAN: data-race in wg_packet_decrypt_worker / wg_packet_rx_poll (2) https://syzkaller.appspot.com/bug?extid=d1de830e4ecdaac83d89 <3> 3 Yes INFO: rcu detected stall in wg_packet_handshake_receive_worker https://syzkaller.appspot.com/bug?extid=dbb6a05624cf5064858c --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkal...@googlegroups.com. To disable reminders for individual bugs, reply with the following command: #syz set no-reminders To change bug's subsystems, reply with: #syz set subsystems: new-subsystem You may send multiple commands in a single email message.
