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From a5eb2f55d79b9023fbda6945da09f9bcecea8560 Mon Sep 17 00:00:00 2001
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From: Thomas Haller <thaller@redhat.com>
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Date: Sun, 28 Feb 2021 11:18:16 +0100
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Subject: [PATCH 1/1] core: increase limit of open file descriptors for
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NetworkManager.service
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Note that POSIX select() can only handle up to 1024 descriptors. That
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means, our code (and the libraries that we use) must not use select().
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Note that libndp uses select(), which means NetworkManager will crash
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when using file descriptors larger than 1023. On the other hand,
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depriving NetworkManager of file descriptors will also crash it.
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So libndp must be fixed ([1]).
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[1] https://listman.redhat.com/archives/libndp-list/2021-February/msg00000.html
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https://bugzilla.redhat.com/show_bug.cgi?id=1926599
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(cherry picked from commit a708a172a6a289d5399897e7da3a0e38721b1b7e)
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(cherry picked from commit 2ca405fa9bd047593cd299691b74af7f44184c71)
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---
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data/NetworkManager.service.in | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/data/NetworkManager.service.in b/data/NetworkManager.service.in
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index 91ebd9a36e65..9cf1c3d28f47 100644
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--- a/data/NetworkManager.service.in
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+++ b/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
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ProtectSystem=true
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ProtectHome=read-only
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+# We require file descriptors for DHCP etc. When activating many interfaces,
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+# the default limit of 1024 is easily reached.
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+LimitNOFILE=65536
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+
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[Install]
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WantedBy=multi-user.target
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Also=NetworkManager-dispatcher.service
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--
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2.29.2
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