test/evp_test.c:718: error: NULL_DEREFERENCE
  pointer `mctx` last assigned on line 696 could be null and is dereferenced by call to `EVP_MD_CTX_free()` at line 718, column 5.
Showing all 24 steps of the trace


test/evp_test.c:688:1: start of procedure digest_test_run()
686.   }
687.   
688. > static int digest_test_run(struct evp_test *t)
689.   {
690.       struct digest_data *mdata = t->data;

test/evp_test.c:690:5: 
688.   static int digest_test_run(struct evp_test *t)
689.   {
690. >     struct digest_data *mdata = t->data;
691.       size_t i;
692.       const char *err = "INTERNAL_ERROR";

test/evp_test.c:692:5: 
690.       struct digest_data *mdata = t->data;
691.       size_t i;
692. >     const char *err = "INTERNAL_ERROR";
693.       EVP_MD_CTX *mctx;
694.       unsigned char md[EVP_MAX_MD_SIZE];

test/evp_test.c:696:5: 
694.       unsigned char md[EVP_MAX_MD_SIZE];
695.       unsigned int md_len;
696. >     mctx = EVP_MD_CTX_new();
697.       if (!mctx)
698.           goto err;

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)

test/evp_test.c:697:10: Taking true branch
695.       unsigned int md_len;
696.       mctx = EVP_MD_CTX_new();
697.       if (!mctx)
                ^
698.           goto err;
699.       err = "DIGESTINIT_ERROR";

test/evp_test.c:717:2: 
715.           goto err;
716.       err = NULL;
717. >  err:
718.       EVP_MD_CTX_free(mctx);
719.       t->err = err;

test/evp_test.c:718:5: 
716.       err = NULL;
717.    err:
718. >     EVP_MD_CTX_free(mctx);
719.       t->err = err;
720.       return 1;
