Add syscall sandboxing (seccomp-bpf)

test/functional/feature_syscall_sandbox.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+# Copyright (c) 2021 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test bitcoind aborts if a disallowed syscall is used when compiled with the syscall sandbox."""
+
+from test_framework.test_framework import BitcoinTestFramework, SkipTest
+
+
+class SyscallSandboxTest(BitcoinTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 1
+
+    def skip_test_if_missing_module(self):
+        if not self.is_syscall_sandbox_compiled():
+            raise SkipTest("bitcoind has not been built with syscall sandbox enabled.")
+        if self.options.nosandbox:
+            raise SkipTest("--nosandbox passed to test runner.")
+
+    def run_test(self):
+        disallowed_syscall_terminated_bitcoind = False
+        expected_log_entry = 'ERROR: The syscall "getgroups" (syscall number 115) is not allowed by the syscall sandbox'
+        with self.nodes[0].assert_debug_log([expected_log_entry]):
+            self.log.info("Invoking disallowed syscall")
+            try:
+                self.nodes[0].invokedisallowedsyscall()
+            except ConnectionError:
+                disallowed_syscall_terminated_bitcoind = True
+        assert disallowed_syscall_terminated_bitcoind
+        self.nodes = []
+
+
+if __name__ == "__main__":
+    SyscallSandboxTest().main()