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units: systemd-udevd: add AF_INET and AF_INET6 to RestrictAddressFamilies= (#4296)

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The udev builtin command `net_setup_link` requires AF_INET and AF_INET6.

Fixes #4293.
This commit is contained in:
Yu Watanabe 2016-10-06 22:40:53 +09:00 committed by Lennart Poettering
parent 8ffce876de
commit 94f42fe3a6
2 changed files with 1 additions and 15 deletions
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14
NEWS
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@ -21,20 +21,6 @@ CHANGES WITH 232 in spe
ProtectKernelTunables=yes, ProtectControlGroups=yes,
RestrictAddressFamilies=.
In particular, systemd-udevd.service is now run in a Seccomp-based
sandbox that prohibits access to AF_INET and AF_INET6 sockets and
thus access to the network. This might break code that runs from udev
rules that tries to talk to the network. Doing that is generally a
bad idea and unsafe due to a variety of reasons. It's also racy as
device management would race against network configuration. It is
recommended to rework such rules to use the SYSTEMD_WANTS property on
the relevant devices to pull in a proper systemd service (which can
be sandboxed differently and ordered correctly after the network
having come up). If that's not possible consider reverting this
sandboxing feature locally by removing the RestrictAddressFamilies=
setting from the systemd-udevd.service unit file, or adding AF_INET
and AF_INET6 to it.
* Support for dynamically creating users for the lifetime of a service
has been added. If DynamicUser=yes is specified, user and group IDs
will be allocated from the range 61184..65519 for the lifetime of the

2
units/systemd-udevd.service.in
View File

@ -27,4 +27,4 @@ TasksMax=infinity
MountFlags=slave
MemoryDenyWriteExecute=yes
RestrictRealtime=yes
RestrictAddressFamilies=AF_UNIX AF_NETLINK
RestrictAddressFamilies=AF_UNIX AF_NETLINK AF_INET AF_INET6