In openssl 1.1.0, in the source file engines/e_dasync.c, there is a potential NPD bug.

In Line 757, EVP_aes_128_cbc_hmac_sha1() function may return null, and then is passed to the function call to dasync_cipher_init_key_helper as the fifth parameter. Later, it will be dereferenced in the source file engines/e_dasync.c at Line 638.

Would you help to confirm whether this is a true bug? Thanks.