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core: increase limit of open file descriptors for NetworkManager.service

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Note that POSIX select() can only handle up to 1024 descriptors. That
means, our code (and the libraries that we use) must not use select().

Note that libndp uses select(), which means NetworkManager will crash
when using file descriptors larger than 1023. On the other hand,
depriving NetworkManager of file descriptors will also crash it.
So libndp must be fixed ([1]).

[1] https://listman.redhat.com/archives/libndp-list/2021-February/msg00000.html

https://bugzilla.redhat.com/show_bug.cgi?id=1926599
(cherry picked from commit a708a172a6)
This commit is contained in:
Thomas Haller 2021-02-28 11:18:16 +01:00
parent f7873997c7
commit 2ca405fa9b
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data/NetworkManager.service.in
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@ -19,6 +19,10 @@ CapabilityBoundingSet=CAP_NET_ADMIN CAP_DAC_OVERRIDE CAP_NET_RAW CAP_NET_BIND_SE
ProtectSystem=true
ProtectHome=read-only
# We require file descriptors for DHCP etc. When activating many interfaces,
# the default limit of 1024 is easily reached.
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Also=NetworkManager-dispatcher.service