crypto/x509/x509_cmp.c:107: error: NULL_DEREFERENCE
  pointer `ctx` last assigned on line 85 could be null and is dereferenced by call to `EVP_MD_CTX_free()` at line 107, column 5.
Showing all 23 steps of the trace


crypto/x509/x509_cmp.c:82:1: start of procedure X509_issuer_and_serial_hash()
80.   
81.   #ifndef OPENSSL_NO_MD5
82. > unsigned long X509_issuer_and_serial_hash(X509 *a)
83.   {
84.       unsigned long ret = 0;

crypto/x509/x509_cmp.c:84:5: 
82.   unsigned long X509_issuer_and_serial_hash(X509 *a)
83.   {
84. >     unsigned long ret = 0;
85.       EVP_MD_CTX *ctx = EVP_MD_CTX_new();
86.       unsigned char md[16];

crypto/x509/x509_cmp.c:85:5: 
83.   {
84.       unsigned long ret = 0;
85. >     EVP_MD_CTX *ctx = EVP_MD_CTX_new();
86.       unsigned char md[16];
87.       char *f;

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:315:1: start of procedure CRYPTO_zalloc()
    313.   }
    314.   
    315. > void *CRYPTO_zalloc(int num, const char *file, int line)
    316.   {
    317.       void *ret = CRYPTO_malloc(num, file, line);

crypto/mem.c:317:5: 
    315.   void *CRYPTO_zalloc(int num, const char *file, int line)
    316.   {
    317. >     void *ret = CRYPTO_malloc(num, file, line);
    318.   
    319.       if (ret != NULL)

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

crypto/mem.c:281:5: 
      279.   void *CRYPTO_malloc(int 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.   #ifdef LEVITTE_DEBUG_MEM
      295.       fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);

crypto/mem.c:297:9: Taking false branch
      295.       fprintf(stderr, "LEVITTE_DEBUG_MEM:         > 0x%p (%d)\n", ret, num);
      296.   #endif
      297.       if (malloc_debug_func != NULL)
                     ^
      298.           malloc_debug_func(ret, num, file, line, 1);
      299.   

crypto/mem.c:312:5: 
      310.   #endif
      311.   
      312. >     return ret;
      313.   }
      314.   

crypto/mem.c:313:1: return from a call to CRYPTO_malloc
      311.   
      312.       return ret;
      313. > }
      314.   
      315.   void *CRYPTO_zalloc(int num, const char *file, int line)

crypto/mem.c:319:9: Taking false branch
    317.       void *ret = CRYPTO_malloc(num, file, line);
    318.   
    319.       if (ret != NULL)
                   ^
    320.           memset(ret, 0, num);
    321.       return ret;

crypto/mem.c:321:5: 
    319.       if (ret != NULL)
    320.           memset(ret, 0, num);
    321. >     return ret;
    322.   }
    323.   

crypto/mem.c:322:1: return from a call to CRYPTO_zalloc
    320.           memset(ret, 0, num);
    321.       return ret;
    322. > }
    323.   
    324.   char *CRYPTO_strdup(const char *str, 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)

crypto/x509/x509_cmp.c:89:9: Taking true branch
87.       char *f;
88.   
89.       if (ctx == NULL)
              ^
90.           goto err;
91.       f = X509_NAME_oneline(a->cert_info.issuer, NULL, 0);

crypto/x509/x509_cmp.c:106:2: 
104.              ((unsigned long)md[2] << 16L) | ((unsigned long)md[3] << 24L)
105.           ) & 0xffffffffL;
106. >  err:
107.       EVP_MD_CTX_free(ctx);
108.       return (ret);

crypto/x509/x509_cmp.c:107:5: 
105.           ) & 0xffffffffL;
106.    err:
107. >     EVP_MD_CTX_free(ctx);
108.       return (ret);
109.   }
