apps/req.c:1555: error: NULL_DEREFERENCE
  pointer `mctx` last assigned on line 1547 could be null and is dereferenced by call to `EVP_MD_CTX_free()` at line 1555, column 9.
Showing all 27 steps of the trace


apps/req.c:1543:1: start of procedure do_X509_CRL_sign()
1541.   }
1542.   
1543. > int do_X509_CRL_sign(X509_CRL *x, EVP_PKEY *pkey, const EVP_MD *md,
1544.                        STACK_OF(OPENSSL_STRING) *sigopts)
1545.   {

apps/req.c:1547:5: 
1545.   {
1546.       int rv;
1547. >     EVP_MD_CTX *mctx = EVP_MD_CTX_new();
1548.       rv = do_sign_init(mctx, pkey, md, sigopts);
1549.       /* Note: X509_CRL_sign_ctx() calls ASN1_item_sign_ctx(), which destroys

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)

apps/req.c:1548:5: 
1546.       int rv;
1547.       EVP_MD_CTX *mctx = EVP_MD_CTX_new();
1548. >     rv = do_sign_init(mctx, pkey, md, sigopts);
1549.       /* Note: X509_CRL_sign_ctx() calls ASN1_item_sign_ctx(), which destroys
1550.        * the EVP_MD_CTX we send it, so only destroy it here if the former

apps/req.c:1489:1: start of procedure do_sign_init()
  1487.   }
  1488.   
  1489. > static int do_sign_init(EVP_MD_CTX *ctx, EVP_PKEY *pkey,
  1490.                           const EVP_MD *md, STACK_OF(OPENSSL_STRING) *sigopts)
  1491.   {

apps/req.c:1492:5: 
  1490.                           const EVP_MD *md, STACK_OF(OPENSSL_STRING) *sigopts)
  1491.   {
  1492. >     EVP_PKEY_CTX *pkctx = NULL;
  1493.       int i;
  1494.   

apps/req.c:1495:9: Taking true branch
  1493.       int i;
  1494.   
  1495.       if (ctx == NULL)
                  ^
  1496.           return 0;
  1497.       if (!EVP_DigestSignInit(ctx, &pkctx, md, NULL, pkey))

apps/req.c:1496:9: 
  1494.   
  1495.       if (ctx == NULL)
  1496. >         return 0;
  1497.       if (!EVP_DigestSignInit(ctx, &pkctx, md, NULL, pkey))
  1498.           return 0;

apps/req.c:1508:1: return from a call to do_sign_init
  1506.       }
  1507.       return 1;
  1508. > }
  1509.   
  1510.   int do_X509_sign(X509 *x, EVP_PKEY *pkey, const EVP_MD *md,

apps/req.c:1552:9: Taking false branch
1550.        * the EVP_MD_CTX we send it, so only destroy it here if the former
1551.        * isn't called */
1552.       if (rv > 0)
                ^
1553.           rv = X509_CRL_sign_ctx(x, mctx);
1554.       else

apps/req.c:1555:9: 
1553.           rv = X509_CRL_sign_ctx(x, mctx);
1554.       else
1555. >         EVP_MD_CTX_free(mctx);
1556.       return rv > 0 ? 1 : 0;
1557.   }
