add sysinfo to syscall whitelist

src/rules/c_cpp.c

@@ -11,7 +11,7 @@ int c_cpp_seccomp_rules(struct config *_config) {
                                 SCMP_SYS(arch_prctl), SCMP_SYS(brk),
                                 SCMP_SYS(access), SCMP_SYS(exit_group),
                                 SCMP_SYS(close), SCMP_SYS(readlink),
-                                SCMP_SYS(uname)};
+                                SCMP_SYS(uname), SCMP_SYS(sysinfo)};
     int syscalls_whitelist_length = sizeof(syscalls_whitelist) / sizeof(int);
     scmp_filter_ctx ctx = NULL;
     // load seccomp rules

tests/Python_and_core/testcase/seccomp/test.py

@@ -80,3 +80,10 @@ class SeccompTest(base.BaseTestCase):
         result = _judger.run(**config)
         self.assertEqual(result["result"], _judger.RESULT_RUNTIME_ERROR)
         self.assertEqual(result["signal"], 31)
+
+    def test_sysinfo(self):
+        config = self.base_config
+        config["exe_path"] = self._compile_c("sysinfo.c")
+        result = _judger.run(**config)
+
+        self.assertEqual(result["result"], _judger.RESULT_SUCCESS)

tests/test_src/seccomp/sysinfo.c

@@ -0,0 +1,8 @@
+// maybe used in qsort function
+#include <unistd.h>
+#include <stdio.h>
+
+int main() {
+    printf("%ld", sysconf(_SC_PAGE_SIZE));
+    return 0;
+}