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nixos/matrix-appservice-irc: update syscall filter

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Simplify the SystemcallFilter by employing an explicit allow list, and
an explicit block list.

Node since version 18 requires syscalls in the @pkey group.

Excluding @privileged and @resources is a recommendation in
systemd-analyze.
This commit is contained in:
Martin Weinelt 2023-07-30 03:07:52 +02:00
parent ddfe5282c8
commit 6ae8e13396
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GPG key ID: 87C1E9888F856759
1 changed files with 4 additions and 1 deletions
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nixos/modules/services/matrix/appservice-irc.nix
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@ -215,7 +215,10 @@ in {
LockPersonality = true;
RestrictRealtime = true;
PrivateMounts = true;
SystemCallFilter = "~@aio @clock @cpu-emulation @debug @keyring @memlock @module @mount @obsolete @raw-io @setuid @swap";
SystemCallFilter = [
"@system-service @pkey"
"~@privileged @resources"
];
SystemCallArchitectures = "native";
# AF_UNIX is required to connect to a postgres socket.
RestrictAddressFamilies = "AF_UNIX AF_INET AF_INET6";