maskit opened a new issue, #10200:
URL: https://github.com/apache/trafficserver/issues/10200

   ```
   441  if (ts_lua_hex_to_bin(key_bin, key, klen) == NULL) {
   442    TSfree(key_bin);
   443    return luaL_error(L, "hex to binary conversion failed");
   444  }
   445  key_bin_len = klen / 2;
   446
   447  HMAC(EVP_sha256(), key_bin, key_bin_len, src, slen, sha_buf, 
&output_length);
   448
        
   CID 1508992 (#1 of 1): Uninitialized scalar variable (UNINIT)
   9. uninit_use_in_call: Using uninitialized element of array sha_buf when 
calling ts_lua_hex_dump. [[show 
details](https://scan6.scan.coverity.com/eventId=34625582-13&modelId=34625582-0&fileInstanceId=162996654&filePath=%2Fplugins%2Flua%2Fts_lua_string.c&fileStart=23&fileEnd=33)]
   449  ts_lua_hex_dump(hex_buf, sha_buf, sizeof(sha_buf));
   450  lua_pushlstring(L, (char *)hex_buf, sizeof(hex_buf));
   451
   452  TSfree(key_bin);
   453  return 1;
   454}
   ```


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