ssl/ssl_lib.c:3628: error: USE_AFTER_FREE
  call to `EVP_MD_CTX_free()` eventually accesses memory that was invalidated by call to `free()` on line 3627 indirectly during the call to `EVP_DigestInit_ex()`.
Showing all 16 steps of the trace


ssl/ssl_lib.c:3626:13: invalidation part of the trace starts here
3624.   {
3625.       ssl_clear_hash_ctx(hash);
3626.       *hash = EVP_MD_CTX_new();
                    ^
3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
3628.           EVP_MD_CTX_free(*hash);

ssl/ssl_lib.c:3626:13: passed as argument to `EVP_MD_CTX_new`
  3624.   {
  3625.       ssl_clear_hash_ctx(hash);
  3626.       *hash = EVP_MD_CTX_new();
                      ^
  3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
  3628.           EVP_MD_CTX_free(*hash);

ssl/ssl_lib.c:3626:13: return from call to `EVP_MD_CTX_new`
  3624.   {
  3625.       ssl_clear_hash_ctx(hash);
  3626.       *hash = EVP_MD_CTX_new();
                      ^
  3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
  3628.           EVP_MD_CTX_free(*hash);

ssl/ssl_lib.c:3626:5: assigned
  3624.   {
  3625.       ssl_clear_hash_ctx(hash);
  3626.       *hash = EVP_MD_CTX_new();
              ^
  3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
  3628.           EVP_MD_CTX_free(*hash);

ssl/ssl_lib.c:3627:33: when calling `EVP_DigestInit_ex` here
  3625.       ssl_clear_hash_ctx(hash);
  3626.       *hash = EVP_MD_CTX_new();
  3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
                                          ^
  3628.           EVP_MD_CTX_free(*hash);
  3629.           *hash = NULL;

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

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

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

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

ssl/ssl_lib.c:3626:13: use-after-lifetime part of the trace starts here
3624.   {
3625.       ssl_clear_hash_ctx(hash);
3626.       *hash = EVP_MD_CTX_new();
                    ^
3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
3628.           EVP_MD_CTX_free(*hash);

ssl/ssl_lib.c:3626:13: passed as argument to `EVP_MD_CTX_new`
  3624.   {
  3625.       ssl_clear_hash_ctx(hash);
  3626.       *hash = EVP_MD_CTX_new();
                      ^
  3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
  3628.           EVP_MD_CTX_free(*hash);

ssl/ssl_lib.c:3626:13: return from call to `EVP_MD_CTX_new`
  3624.   {
  3625.       ssl_clear_hash_ctx(hash);
  3626.       *hash = EVP_MD_CTX_new();
                      ^
  3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
  3628.           EVP_MD_CTX_free(*hash);

ssl/ssl_lib.c:3626:5: assigned
  3624.   {
  3625.       ssl_clear_hash_ctx(hash);
  3626.       *hash = EVP_MD_CTX_new();
              ^
  3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
  3628.           EVP_MD_CTX_free(*hash);

ssl/ssl_lib.c:3628:9: when calling `EVP_MD_CTX_free` here
  3626.       *hash = EVP_MD_CTX_new();
  3627.       if (*hash == NULL || (md && EVP_DigestInit_ex(*hash, md, NULL) <= 0)) {
  3628.           EVP_MD_CTX_free(*hash);
                  ^
  3629.           *hash = NULL;
  3630.           return NULL;

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

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