ssl/ssl_lib.c:3183: error: NULL_DEREFERENCE
  pointer `*hash` last assigned on line 3181 could be null and is dereferenced by call to `EVP_MD_CTX_free()` at line 3183, column 9.
Showing all 26 steps of the trace


ssl/ssl_lib.c:3178:1: start of procedure ssl_replace_hash()
3176.    */
3177.   
3178. > EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
3179.   {
3180.       ssl_clear_hash_ctx(hash);

ssl/ssl_lib.c:3180:5: 
3178.   EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
3179.   {
3180. >     ssl_clear_hash_ctx(hash);
3181.       *hash = EVP_MD_CTX_new();
3182.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {

ssl/ssl_lib.c:3190:1: start of procedure ssl_clear_hash_ctx()
  3188.   }
  3189.   
  3190. > void ssl_clear_hash_ctx(EVP_MD_CTX **hash)
  3191.   {
  3192.   

ssl/ssl_lib.c:3193:9: Taking false branch
  3191.   {
  3192.   
  3193.       if (*hash)
                  ^
  3194.           EVP_MD_CTX_free(*hash);
  3195.       *hash = NULL;

ssl/ssl_lib.c:3195:5: 
  3193.       if (*hash)
  3194.           EVP_MD_CTX_free(*hash);
  3195. >     *hash = NULL;
  3196.   }
  3197.   

ssl/ssl_lib.c:3196:1: return from a call to ssl_clear_hash_ctx
  3194.           EVP_MD_CTX_free(*hash);
  3195.       *hash = NULL;
  3196. > }
  3197.   
  3198.   /* Retrieve handshake hashes */

ssl/ssl_lib.c:3181:5: 
3179.   {
3180.       ssl_clear_hash_ctx(hash);
3181. >     *hash = EVP_MD_CTX_new();
3182.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
3183.           EVP_MD_CTX_free(*hash);

crypto/evp/digest.c:153:1: start of procedure EVP_MD_CTX_new()
  151.   }
  152.   
  153. > EVP_MD_CTX *EVP_MD_CTX_new(void)
  154.   {
  155.       return OPENSSL_zalloc(sizeof(EVP_MD_CTX));

crypto/evp/digest.c:155:5: 
  153.   EVP_MD_CTX *EVP_MD_CTX_new(void)
  154.   {
  155. >     return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
  156.   }
  157.   

crypto/mem.c:312:1: start of procedure CRYPTO_zalloc()
    310.   }
    311.   
    312. > void *CRYPTO_zalloc(size_t num, const char *file, int line)
    313.   {
    314.       void *ret = CRYPTO_malloc(num, file, line);

crypto/mem.c:314:5: 
    312.   void *CRYPTO_zalloc(size_t num, const char *file, int line)
    313.   {
    314. >     void *ret = CRYPTO_malloc(num, file, line);
    315.   
    316.       if (ret != NULL)

crypto/mem.c:279:1: start of procedure CRYPTO_malloc()
      277.   }
      278.   
      279. > void *CRYPTO_malloc(size_t num, const char *file, int line)
      280.   {
      281.       void *ret = NULL;

crypto/mem.c:281:5: 
      279.   void *CRYPTO_malloc(size_t num, const char *file, int line)
      280.   {
      281. >     void *ret = NULL;
      282.   
      283.       if (num <= 0)

crypto/mem.c:283:9: Taking false branch
      281.       void *ret = NULL;
      282.   
      283.       if (num <= 0)
                     ^
      284.           return NULL;
      285.   

crypto/mem.c:286:9: Taking false branch
      284.           return NULL;
      285.   
      286.       if (allow_customize)
                     ^
      287.           allow_customize = 0;
      288.       if (malloc_debug_func != NULL) {

crypto/mem.c:288:9: Taking false branch
      286.       if (allow_customize)
      287.           allow_customize = 0;
      288.       if (malloc_debug_func != NULL) {
                     ^
      289.           if (allow_customize_debug)
      290.               allow_customize_debug = 0;

crypto/mem.c:293:5: Skipping __function_pointer__(): unresolved function pointer
      291.           malloc_debug_func(NULL, num, file, line, 0);
      292.       }
      293.       ret = malloc_ex_func(num, file, line);
                 ^
      294.       if (malloc_debug_func != NULL)
      295.           malloc_debug_func(ret, num, file, line, 1);

crypto/mem.c:294:9: Taking false branch
      292.       }
      293.       ret = malloc_ex_func(num, file, line);
      294.       if (malloc_debug_func != NULL)
                     ^
      295.           malloc_debug_func(ret, num, file, line, 1);
      296.   

crypto/mem.c:309:5: 
      307.   #endif
      308.   
      309. >     return ret;
      310.   }
      311.   

crypto/mem.c:310:1: return from a call to CRYPTO_malloc
      308.   
      309.       return ret;
      310. > }
      311.   
      312.   void *CRYPTO_zalloc(size_t num, const char *file, int line)

crypto/mem.c:316:9: Taking false branch
    314.       void *ret = CRYPTO_malloc(num, file, line);
    315.   
    316.       if (ret != NULL)
                   ^
    317.           memset(ret, 0, num);
    318.       return ret;

crypto/mem.c:318:5: 
    316.       if (ret != NULL)
    317.           memset(ret, 0, num);
    318. >     return ret;
    319.   }
    320.   

crypto/mem.c:319:1: return from a call to CRYPTO_zalloc
    317.           memset(ret, 0, num);
    318.       return ret;
    319. > }
    320.   
    321.   void *CRYPTO_realloc(void *str, size_t num, const char *file, int line)

crypto/evp/digest.c:156:1: return from a call to EVP_MD_CTX_new
  154.   {
  155.       return OPENSSL_zalloc(sizeof(EVP_MD_CTX));
  156. > }
  157.   
  158.   void EVP_MD_CTX_free(EVP_MD_CTX *ctx)

ssl/ssl_lib.c:3182:9: Taking true branch
3180.       ssl_clear_hash_ctx(hash);
3181.       *hash = EVP_MD_CTX_new();
3182.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
                ^
3183.           EVP_MD_CTX_free(*hash);
3184.           *hash = NULL;

ssl/ssl_lib.c:3183:9: 
3181.       *hash = EVP_MD_CTX_new();
3182.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
3183. >         EVP_MD_CTX_free(*hash);
3184.           *hash = NULL;
3185.           return NULL;

EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)
{
    ssl_clear_hash_ctx(hash);
    *hash = EVP_MD_CTX_new();
    if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
        EVP_MD_CTX_free(*hash);
        *hash = NULL;
        return NULL;
    }
    return *hash;
}
['EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash, const EVP_MD *md)\n{\n    ssl_clear_hash_ctx(hash);\n    *hash = EVP_MD_CTX_new();\n    if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {\n        EVP_MD_CTX_free(*hash);\n        *hash = NULL;\n        return NULL;\n    }\n    return *hash;\n}', 'void ssl_clear_hash_ctx(EVP_MD_CTX **hash)\n{\n    if (*hash)\n        EVP_MD_CTX_free(*hash);\n    *hash = NULL;\n}', 'EVP_MD_CTX *EVP_MD_CTX_new(void)\n{\n    return OPENSSL_zalloc(sizeof(EVP_MD_CTX));\n}', 'void *CRYPTO_zalloc(size_t num, const char *file, int line)\n{\n    void *ret = CRYPTO_malloc(num, file, line);\n    if (ret != NULL)\n        memset(ret, 0, num);\n    return ret;\n}', 'void *CRYPTO_malloc(size_t num, const char *file, int line)\n{\n    void *ret = NULL;\n    if (num <= 0)\n        return NULL;\n    if (allow_customize)\n        allow_customize = 0;\n    if (malloc_debug_func != NULL) {\n        if (allow_customize_debug)\n            allow_customize_debug = 0;\n        malloc_debug_func(NULL, num, file, line, 0);\n    }\n    ret = malloc_ex_func(num, file, line);\n    if (malloc_debug_func != NULL)\n        malloc_debug_func(ret, num, file, line, 1);\n#ifndef OPENSSL_CPUID_OBJ\n    if (ret && (num > 2048)) {\n        extern unsigned char cleanse_ctr;\n        ((unsigned char *)ret)[0] = cleanse_ctr;\n    }\n#endif\n    return ret;\n}']