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From: ebiederm@xmission.com (Eric W. Biederman)
To: Christian Brauner <christian.brauner@ubuntu.com>
Cc: davem@davemloft.net, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, avagin@virtuozzo.com,
	ktkhai@virtuozzo.com, serge@hallyn.com,
	gregkh@linuxfoundation.org
Subject: Re: [PATCH net-next 0/2 v5] netns: uevent filtering
Date: Mon, 30 Apr 2018 10:55:55 -0500
Message-ID: <87fu3cbsdw.fsf@xmission.com> (raw)
In-Reply-To: <20180429104412.22445-1-christian.brauner@ubuntu.com>

Christian Brauner <christian.brauner@ubuntu.com> writes:

> 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

Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>

>
> Christian Brauner (2):
>   uevent: add alloc_uevent_skb() helper
>   netns: restrict uevents
>
>  lib/kobject_uevent.c | 178 ++++++++++++++++++++++++++++++-------------
>  1 file changed, 126 insertions(+), 52 deletions(-)

Eric

  parent reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
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
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 ` ebiederm [this message]
2018-05-01 14:23   ` [PATCH net-next 0/2 v5] netns: uevent filtering David Miller

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