SpecCheck: Check for NULL char in all lines

Fix https://github.com/rpm-software-management/rpmlint/issues/1067

rpmlint/checks/SpecCheck.py

@@ -670,6 +670,8 @@ class SpecCheck(AbstractCheck):
         self._checkline_package_obsoletes(line)
         self._checkline_package_conflicts(line)
 
+        self._checkline_forbidden_controlchars(line)
+
     def _checkline_changelog(self, line):
         if self.current_section == 'changelog':
             deptoken = Pkg.has_forbidden_controlchars(line)
@@ -762,3 +764,9 @@ class SpecCheck(AbstractCheck):
         if python_sitelib_glob_regex.match(line):
             self.output.add_info('W', self.pkg, 'python-sitelib-glob-in-files',
                                  line[:-1])
+
+    def _checkline_forbidden_controlchars(self, line):
+        """Look for controlchar in any line"""
+        # https://github.com/rpm-software-management/rpmlint/issues/1067
+        if Pkg.has_forbidden_controlchars(line):
+            self.output.add_info('W', self.pkg, 'forbidden-controlchar-found')

test/test_speccheck.py

@@ -1156,3 +1156,15 @@ def test_python_sitelib(package, speccheck):
     test.check_spec(pkg)
     out = output.print_results(output.results)
     assert 'W: python-sitelib-glob-in-files' not in out
+
+
+@pytest.mark.parametrize('package', [
+    'spec/null-char-last',
+    'spec/null-char-first',
+])
+def test_null_char(package, speccheck):
+    output, test = speccheck
+    pkg = get_tested_spec_package(package)
+    test.check_spec(pkg)
+    out = output.print_results(output.results)
+    assert 'forbidden-controlchar-found' in out