diff --git a/scripts/param_cfg_to_code.py b/scripts/param_cfg_to_code.py
index edb8e7d7e2416fe69dadfa4b94b06b39dd3f1db4..50c9ee5eba197db76bd0f091460f146699e58df0 100755
--- a/scripts/param_cfg_to_code.py
+++ b/scripts/param_cfg_to_code.py
@@ -144,7 +144,8 @@ def main():
 
     for source in args.source:
         print("source {}".format(out_dir))
-        assert os.path.exists(source)
+        if not os.path.exists(source):
+            raise FileNotFoundError
 
         src_dict = get_param_from_cfg(source)
         dst = "".join([out_dir, "param_cfg.h"])
diff --git a/services/init/init_common_service.c b/services/init/init_common_service.c
index 1ed3a9582d5da36bb72ca26cabfa20c0c57a17c2..f6d25a5020b8bb48a5a0d6262ed713dd9f52af01 100644
--- a/services/init/init_common_service.c
+++ b/services/init/init_common_service.c
@@ -474,7 +474,7 @@ static void CheckServiceSocket(Service *service)
     return;
 }
 
-static void CheckOndemandService(service)
+static void CheckOndemandService(Service *service)
 {
     CheckServiceSocket(service);
     if (strcmp(service->name, "console") == 0) {
diff --git a/services/modules/seccomp/scripts/generate_code_from_policy.py b/services/modules/seccomp/scripts/generate_code_from_policy.py
index 7eedb3fb8767a431d4ec4bb77781495f10012d29..ce71daa494848ebd76b15abc4381767f7f5aae8d 100755
--- a/services/modules/seccomp/scripts/generate_code_from_policy.py
+++ b/services/modules/seccomp/scripts/generate_code_from_policy.py
@@ -747,7 +747,8 @@ class SeccompPolicyParser:
         with open(args.dstfile, 'w') as output_file:
             output_file.write(content)
 
-    def filter_syscalls_nr(self, name_to_nr):
+    @staticmethod
+    def filter_syscalls_nr(name_to_nr):
         syscalls = {}
         for syscall_name, nr in name_to_nr.items():
             if not syscall_name.startswith("__NR_") and not syscall_name.startswith("__ARM_NR_"):
@@ -776,7 +777,7 @@ class SeccompPolicyParser:
                     continue
                 try:
                     name = k.group(1)
-                    nr = eval(mark_pattern.sub(lambda x: str(name_to_nr[x.group(0)]),
+                    nr = eval(mark_pattern.sub(lambda x: str(name_to_nr.get(x.group(0))),
                                             k.group(2)))
 
                     name_to_nr[name] = nr