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* [PATCH net-next 0/2 v5] netns: uevent filtering
@ 2018-04-29 10:44 Christian Brauner
  2018-04-29 10:44 ` [PATCH net-next 1/2 v5] uevent: add alloc_uevent_skb() helper Christian Brauner
                   ` (2 more replies)
  0 siblings, 3 replies; 10+ messages in thread
From: Christian Brauner @ 2018-04-29 10:44 UTC (permalink / raw)
  To: ebiederm, davem, netdev, linux-kernel
  Cc: avagin, ktkhai, serge, gregkh, Christian Brauner

Hey everyone,

This is the new approach to uevent filtering as discussed (see the
threads in [1], [2], and [3]). It only contains *non-functional
changes*.

This series deals with with fixing up uevent filtering logic:
- uevent filtering logic is simplified
- locking time on uevent_sock_list is minimized
- tagged and untagged kobjects are handled in separate codepaths
- permissions for userspace are fixed for network device uevents in
  network namespaces owned by non-initial user namespaces
  Udev is now able to see those events correctly which it wasn't before.
  For example, moving a physical device into a network namespace not
  owned by the initial user namespaces before gave:

  root@xen1:~# udevadm --debug monitor -k
  calling: monitor
  monitor will print the received events for:
  KERNEL - the kernel uevent

  sender uid=65534, message ignored
  sender uid=65534, message ignored
  sender uid=65534, message ignored
  sender uid=65534, message ignored
  sender uid=65534, message ignored

  and now after the discussion and solution in [3] correctly gives:

  root@xen1:~# udevadm --debug monitor -k
  calling: monitor
  monitor will print the received events for:
  KERNEL - the kernel uevent

  KERNEL[625.301042] add      /devices/pci0000:00/0000:00:02.0/0000:01:00.1/net/enp1s0f1 (net)
  KERNEL[625.301109] move     /devices/pci0000:00/0000:00:02.0/0000:01:00.1/net/enp1s0f1 (net)
  KERNEL[625.301138] move     /devices/pci0000:00/0000:00:02.0/0000:01:00.1/net/eth1 (net)
  KERNEL[655.333272] remove /devices/pci0000:00/0000:00:02.0/0000:01:00.1/net/eth1 (net)

Thanks!
Christian

[1]: https://lkml.org/lkml/2018/4/4/739
[2]: https://lkml.org/lkml/2018/4/26/767
[3]: https://lkml.org/lkml/2018/4/26/738

Christian Brauner (2):
  uevent: add alloc_uevent_skb() helper
  netns: restrict uevents

 lib/kobject_uevent.c | 178 ++++++++++++++++++++++++++++++-------------
 1 file changed, 126 insertions(+), 52 deletions(-)

-- 
2.17.0

^ permalink raw reply	[flat|nested] 10+ messages in thread

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Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-04-29 10:44 [PATCH net-next 0/2 v5] netns: uevent filtering Christian Brauner
2018-04-29 10:44 ` [PATCH net-next 1/2 v5] uevent: add alloc_uevent_skb() helper Christian Brauner
2018-04-29 10:44 ` [PATCH net-next 2/2 v5] netns: restrict uevents Christian Brauner
2019-06-14 22:49   ` Dmitry Torokhov
2019-06-16 11:50     ` ebiederm
2019-06-16 16:50       ` Christian Brauner
2019-06-16 17:14         ` Dmitry Torokhov
2019-06-16 16:50       ` Dmitry Torokhov
2018-04-30 15:55 ` [PATCH net-next 0/2 v5] netns: uevent filtering ebiederm
2018-05-01 14:23   ` David Miller

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