crypto/evp/digest.c:289: error: USE_AFTER_FREE
  call to `EVP_MD_CTX_copy_ex()` eventually accesses memory that was invalidated by call to `free()` on line 288 indirectly during the call to `EVP_MD_CTX_reset()`.
Showing all 14 steps of the trace


crypto/evp/digest.c:286:1: invalidation part of the trace starts here
284.   }
285.   
286. > int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
287.   {
288.       EVP_MD_CTX_reset(out);

crypto/evp/digest.c:286:1: parameter `out` of EVP_MD_CTX_copy
  284.   }
  285.   
  286. > int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
  287.   {
  288.       EVP_MD_CTX_reset(out);

crypto/evp/digest.c:288:5: when calling `EVP_MD_CTX_reset` here
  286.   int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
  287.   {
  288.       EVP_MD_CTX_reset(out);
             ^
  289.       return EVP_MD_CTX_copy_ex(out, in);
  290.   }

crypto/evp/digest.c:123:1: parameter `ctx` of EVP_MD_CTX_reset
    121.   
    122.   /* This call frees resources associated with the context */
    123. > int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)
    124.   {
    125.       if (ctx == NULL)

crypto/evp/digest.c:137:9: when calling `CRYPTO_clear_free` here
    135.       if (ctx->digest && ctx->digest->ctx_size && ctx->md_data
    136.           && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {
    137.           OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);
                   ^
    138.       }
    139.       EVP_PKEY_CTX_free(ctx->pctx);

crypto/mem.c:249:1: parameter `str` of CRYPTO_clear_free
      247.   }
      248.   
      249. > void CRYPTO_clear_free(void *str, size_t num)
      250.   {
      251.       if (str == NULL)

crypto/mem.c:255:5: when calling `CRYPTO_free` here
      253.       if (num)
      254.           OPENSSL_cleanse(str, num);
      255.       CRYPTO_free(str);
                 ^
      256.   }

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

crypto/mem.c:245:5: was invalidated by call to `free()`
        243.       }
        244.   #else
        245.       free(str);
                   ^
        246.   #endif
        247.   }

crypto/evp/digest.c:286:1: use-after-lifetime part of the trace starts here
284.   }
285.   
286. > int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
287.   {
288.       EVP_MD_CTX_reset(out);

crypto/evp/digest.c:286:1: parameter `out` of EVP_MD_CTX_copy
  284.   }
  285.   
  286. > int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)
  287.   {
  288.       EVP_MD_CTX_reset(out);

crypto/evp/digest.c:289:12: when calling `EVP_MD_CTX_copy_ex` here
  287.   {
  288.       EVP_MD_CTX_reset(out);
  289.       return EVP_MD_CTX_copy_ex(out, in);
                    ^
  290.   }
  291.   

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

crypto/mem.c:245:5: invalid access occurs here
    243.       }
    244.   #else
    245.       free(str);
               ^
    246.   #endif
    247.   }

void CRYPTO_free(void *str)
{
#ifdef CRYPTO_MDEBUG
    if (call_malloc_debug) {
        CRYPTO_mem_debug_free(str, 0);
        free(str);
        CRYPTO_mem_debug_free(str, 1);
    } else {
        free(str);
    }
#else
    free(str);
#endif
}
['int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in)\n{\n    EVP_MD_CTX_reset(out);\n    return EVP_MD_CTX_copy_ex(out, in);\n}', 'int EVP_MD_CTX_reset(EVP_MD_CTX *ctx)\n{\n    if (ctx == NULL)\n        return 1;\n    if (ctx->digest && ctx->digest->cleanup\n        && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_CLEANED))\n        ctx->digest->cleanup(ctx);\n    if (ctx->digest && ctx->digest->ctx_size && ctx->md_data\n        && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE)) {\n        OPENSSL_clear_free(ctx->md_data, ctx->digest->ctx_size);\n    }\n    EVP_PKEY_CTX_free(ctx->pctx);\n#ifndef OPENSSL_NO_ENGINE\n    if (ctx->engine)\n        ENGINE_finish(ctx->engine);\n#endif\n    memset(ctx, 0, sizeof(*ctx));\n    return 1;\n}', 'void CRYPTO_clear_free(void *str, size_t num)\n{\n    if (str == NULL)\n        return;\n    if (num)\n        OPENSSL_cleanse(str, num);\n    CRYPTO_free(str);\n}', 'void CRYPTO_free(void *str)\n{\n#ifdef CRYPTO_MDEBUG\n    if (call_malloc_debug) {\n        CRYPTO_mem_debug_free(str, 0);\n        free(str);\n        CRYPTO_mem_debug_free(str, 1);\n    } else {\n        free(str);\n    }\n#else\n    free(str);\n#endif\n}']