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[release/1.6 backport] oci: WithDefaultUnixDevices(): remove tun/tap from the default devices#7268

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mxpv merged 1 commit intocontainerd:release/1.6from
thaJeztah:1.6_backport_no_tun
Aug 8, 2022
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[release/1.6 backport] oci: WithDefaultUnixDevices(): remove tun/tap from the default devices#7268
mxpv merged 1 commit intocontainerd:release/1.6from
thaJeztah:1.6_backport_no_tun

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@thaJeztah thaJeztah commented Aug 8, 2022

A container should not have access to tun/tap device, unless it is explicitly
specified in configuration.

This device was already removed from docker's default, and runc's default;

Per the commit message in runc, this should also fix these messages;

Apr 26 03:46:56 foo.bar systemd1: Couldn't stat device /dev/char/10:200: No such file or directory

coming from systemd on every container start, when the systemd cgroup driver
is used, and the system runs an old (< v240) version of systemd
(the message was presumably eliminated by 1).

(cherry picked from commit a3ac156)

A container should not have access to tun/tap device, unless it is explicitly
specified in configuration.

This device was already removed from docker's default, and runc's default;

- opencontainers/runc@2ce40b6
- https://github.com/moby/moby//commit/9c4570a958df42d1ad19364b1a8da55b891d850a

Per the commit message in runc, this should also fix these messages;

> Apr 26 03:46:56 foo.bar systemd[1]: Couldn't stat device /dev/char/10:200: No such file or directory

coming from systemd on every container start, when the systemd cgroup driver
is used, and the system runs an old (< v240) version of systemd
(the message was presumably eliminated by [1]).

[1]: systemd/systemd@d5aecba

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit a3ac156)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
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LGTM

@mxpv mxpv merged commit 026ac1c into containerd:release/1.6 Aug 8, 2022
@thaJeztah thaJeztah deleted the 1.6_backport_no_tun branch August 8, 2022 17:25
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3 participants