tests: add YAML variant leak regression

Signed-off-by: Eduardo Silva <eduardo@chronosphere.io>

Author: edsiper

tests/internal/config_format_yaml.c

@@ -35,6 +35,7 @@
 
 #define FLB_000_WIN FLB_TESTS_CONF_PATH "\\fluent-bit-windows.yaml"
 #define FLB_BROKEN_PLUGIN_VARIANT FLB_TESTS_CONF_PATH "/broken_plugin_variant.yaml"
+#define FLB_CLUSTERFUZZ_VARIANT_MISSING_KEY FLB_TESTS_CONF_PATH "/clusterfuzz_variant_missing_key.yaml"
 
 #ifdef _WIN32
 #define FLB_BASIC FLB_000_WIN
@@ -196,15 +197,24 @@ static void test_customs_section()
 
 static void test_broken_plugin_variant_yaml()
 {
+    char *test_cases[] = {
+        FLB_BROKEN_PLUGIN_VARIANT,
+        FLB_CLUSTERFUZZ_VARIANT_MISSING_KEY,
+        NULL,
+    };
     struct flb_cf *cf;
+    int i;
 
-    cf = flb_cf_yaml_create(NULL, FLB_BROKEN_PLUGIN_VARIANT, NULL, 0);
-    TEST_CHECK(cf == NULL);
+    for (i = 0; test_cases[i] != NULL; i++) {
+        cf = flb_cf_yaml_create(NULL, test_cases[i], NULL, 0);
+        TEST_CHECK_(cf == NULL,
+                    "config_format created from broken YAML file %s",
+                    test_cases[i]);
 
-    if (cf != NULL) {
-        TEST_CHECK_(cf != NULL, "somewhat config_format is created wrongly");
-        flb_cf_dump(cf);
-        flb_cf_destroy(cf);
+        if (cf != NULL) {
+            flb_cf_dump(cf);
+            flb_cf_destroy(cf);
+        }
     }
 }
 

tests/internal/data/config_format/yaml/clusterfuzz_variant_missing_key.yaml

@@ -0,0 +1 @@
+cUSTOMS: {processors: {{metrics: [O: [],O: [44444444: [/-1,O: [-: [444,O: [-------O: [],O: _T,true],O------O340282366920938463463374607431768211457: [/cUSTOMS: {processors: {{{traceS: {p,[0,O: [-: [0,O: [-------O: [],O: [],true],O------O: [],O: [],true],O,O: C,C,XX],O: [_,O: [],true],-------O: [],O: [],true],O------O: []: {C,[]: {psceSC,444,O: [-------O: [],O: [T,true],O------O44: [/0,O: [-: [0,O: [-------O: [],O: [],true],O------O: [],O: [],true],O,O: C,C,XX],O: [_,O: [],true],-------O: [],O: [],true],O------O: [442,O: [-------O: [],O: [T,true],O------O-9363176467: [/0,O: [-: [107405540802,O: [-------O: [],O: [],true],O------O: [],O: [],true],O,O: C,C,XX],O: [[]:_,O: [],true],-------O: [],O: [],true],O------O: [],O: [],true],O,O: C,C,O,O: C,X],O: [],true