test/evp_test.c:714: error: USE_AFTER_FREE
  call to `EVP_DigestFinal()` eventually accesses memory that was invalidated by call to `free()` on line 706 indirectly during the call to `EVP_DigestInit_ex()`.
Showing all 16 steps of the trace


test/evp_test.c:702:12: invalidation part of the trace starts here
700.       unsigned char md[EVP_MAX_MD_SIZE];
701.       unsigned int md_len;
702.       mctx = EVP_MD_CTX_new();
                  ^
703.       if (!mctx)
704.           goto err;

test/evp_test.c:702:12: passed as argument to `EVP_MD_CTX_new`
  700.       unsigned char md[EVP_MAX_MD_SIZE];
  701.       unsigned int md_len;
  702.       mctx = EVP_MD_CTX_new();
                    ^
  703.       if (!mctx)
  704.           goto err;

test/evp_test.c:702:12: return from call to `EVP_MD_CTX_new`
  700.       unsigned char md[EVP_MAX_MD_SIZE];
  701.       unsigned int md_len;
  702.       mctx = EVP_MD_CTX_new();
                    ^
  703.       if (!mctx)
  704.           goto err;

test/evp_test.c:702:5: assigned
  700.       unsigned char md[EVP_MAX_MD_SIZE];
  701.       unsigned int md_len;
  702.       mctx = EVP_MD_CTX_new();
             ^
  703.       if (!mctx)
  704.           goto err;

test/evp_test.c:706:10: when calling `EVP_DigestInit_ex` here
  704.           goto err;
  705.       err = "DIGESTINIT_ERROR";
  706.       if (!EVP_DigestInit_ex(mctx, mdata->digest, NULL))
                  ^
  707.           goto err;
  708.       err = "DIGESTUPDATE_ERROR";

crypto/evp/digest.c:169:1: parameter `ctx` of EVP_DigestInit_ex
    167.   }
    168.   
    169. > int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
    170.   {
    171.       EVP_MD_CTX_clear_flags(ctx, EVP_MD_CTX_FLAG_CLEANED);

crypto/evp/digest.c:228:13: when calling `CRYPTO_free` here
    226.       if (ctx->digest != type) {
    227.           if (ctx->digest && ctx->digest->ctx_size)
    228.               OPENSSL_free(ctx->md_data);
                       ^
    229.           ctx->digest = type;
    230.           if (!(ctx->flags & EVP_MD_CTX_FLAG_NO_INIT) && type->ctx_size) {

crypto/mem.c:233:1: parameter `str` of CRYPTO_free
      231.   }
      232.   
      233. > void CRYPTO_free(void *str)
      234.   {
      235.   #ifndef OPENSSL_NO_CRYPTO_MDEBUG

crypto/mem.c:244:5: was invalidated by call to `free()`
      242.       }
      243.   #else
      244.       free(str);
                 ^
      245.   #endif
      246.   }

test/evp_test.c:702:12: use-after-lifetime part of the trace starts here
700.       unsigned char md[EVP_MAX_MD_SIZE];
701.       unsigned int md_len;
702.       mctx = EVP_MD_CTX_new();
                  ^
703.       if (!mctx)
704.           goto err;

test/evp_test.c:702:12: passed as argument to `EVP_MD_CTX_new`
  700.       unsigned char md[EVP_MAX_MD_SIZE];
  701.       unsigned int md_len;
  702.       mctx = EVP_MD_CTX_new();
                    ^
  703.       if (!mctx)
  704.           goto err;

test/evp_test.c:702:12: return from call to `EVP_MD_CTX_new`
  700.       unsigned char md[EVP_MAX_MD_SIZE];
  701.       unsigned int md_len;
  702.       mctx = EVP_MD_CTX_new();
                    ^
  703.       if (!mctx)
  704.           goto err;

test/evp_test.c:702:5: assigned
  700.       unsigned char md[EVP_MAX_MD_SIZE];
  701.       unsigned int md_len;
  702.       mctx = EVP_MD_CTX_new();
             ^
  703.       if (!mctx)
  704.           goto err;

test/evp_test.c:714:10: when calling `EVP_DigestFinal` here
  712.       }
  713.       err = "DIGESTFINAL_ERROR";
  714.       if (!EVP_DigestFinal(mctx, md, &md_len))
                  ^
  715.           goto err;
  716.       err = "DIGEST_LENGTH_MISMATCH";

crypto/mem.c:233:1: parameter `str` of CRYPTO_free
    231.   }
    232.   
    233. > void CRYPTO_free(void *str)
    234.   {
    235.   #ifndef OPENSSL_NO_CRYPTO_MDEBUG

crypto/mem.c:244:5: invalid access occurs here
    242.       }
    243.   #else
    244.       free(str);
               ^
    245.   #endif
    246.   }
