malloc失败时发生内存泄漏

以下函数会泄漏内存，有什么想法吗？

map.c：

#define INITIAL_SIZE 10
#define KEYS_AND_VALUES 0

  struct Map_t {
        char **keys;
        char **values;
        int size;
        int max_size;
        int iterator;
    };


Map mapCreate()
{
    Map map = malloc(sizeof(*map));
    if (!map)
    {
        return NULL;
    }
    map->keys = malloc(INITIAL_SIZE * sizeof(char *));
    if (!map->keys)
    {
        free(map);
        return NULL;
    }
    map->values = malloc(INITIAL_SIZE * sizeof(char *));
    if (!map->values)
    {
        free(map->keys);
        free(map);
        return NULL;
    }
    map->size = 0;
    map->max_size = INITIAL_SIZE;
    initializeElements(map,0,map->max_size,KEYS_AND_VALUES);
    return map;
}

static void initializeElements(Map map, int initial_index, int last_index, int mode)
{
    for (int i=initial_index;i<last_index;i++)
    {
        if (mode==KEYS || mode==KEYS_AND_VALUES)
        {
            map->keys[i]=NULL;
        }
        if (mode==VALUES || mode==KEYS_AND_VALUES)
        {
            map->values[i]=NULL;
        }
    }
}

void mapDestroy(Map map)
{
    if (!map)
    {
        return;
    }
    mapClear(map);
    free(map->keys);
    free(map->values);
    free(map);
}

map.h：

typedef struct Map_t* Map;

valgrind报告：

==1817==     in use at exit: 524 bytes in 26 blocks
==1817==   total heap usage: 30,132 allocs, 30,106 frees, 575,911 bytes allocated
==1817==
==1817== 262 (32 direct, 230 indirect) bytes in 1 blocks are definitely lost in loss record 17 of 18
==1817==    at 0x4C29BC3: malloc (vg_replace_malloc.c:299)
==1817==    by 0x402AAF: mapCreate (map.c:106)
==1817==    by 0x402420: testMapForEach (main.c:272)
==1817==    by 0x4028A2: main (main.c:324)

I am sure that the function in handled well in testMapForEach() and main Note: I'm mostly that The leak mostly (99.9%) occurs when one of the uses of malloc fails. The test if needed at all consists of 300 lines of code at: https://github.com/gur111/MtmEx1Tester/blob/master/map_tests.c That's why I ask you to focus on mapCreate(). Thanks

更新： 确认后，testMapForEach（在测试代码上可用）捕获到泄漏