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networkd: downgrade error for non-system users/groups to a warning

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This reverts (in spirit) "network/tuntap: deny from owning Tun/Tap interfaces",
commit 940441b44c.

Justification similar as in the previous commit. The check is only
partially connected to the intended purpose and breaks backwards compat
without a sufficient reason.

Alternative fix for #37279.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
2026-02-11 11:24:37 +01:00
parent 5c05a339c6
commit f6c8c89ff7
5 changed files with 49 additions and 18 deletions
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man/systemd.netdev.xml
+6 -4
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@@ -2019,16 +2019,18 @@ Ports=eth2</programlisting>
</varlistentry>
<varlistentry>
<term><varname>User=</varname></term>
<listitem><para>User to grant access to the <filename>/dev/net/tun</filename> device. The specified
user must be a system user.</para>
<listitem><para>User to grant access to the <filename>/dev/net/tun</filename> device.
Note that the user must be resolvable during early boot. Using non-system users
is deprecated.</para>
<xi:include href="version-info.xml" xpointer="v215"/>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Group=</varname></term>
<listitem><para>Group to grant access to the <filename>/dev/net/tun</filename> device. The specified
group must be a system group.</para>
<listitem><para>Group to grant access to the <filename>/dev/net/tun</filename> device.
Note that the group must be resolvable during early boot. Using non-system groups
is deprecated.</para>
<xi:include href="version-info.xml" xpointer="v215"/>
</listitem>