crypto: algif_hash - wait for crypto_ahash_init() to complete

crypto: algif_hash - wait for crypto_ahash_init() to complete

Orabug: 23330797

[ Upstream commit fe09786178f9df713a4b2dd6b93c0a722346bf5e ]

hash_sendmsg/sendpage() need to wait for the completion
of crypto_ahash_init() otherwise it can cause panic.

Cc: stable@vger.kernel.org
Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
(cherry picked from commit bd92b10c95b37a4d6c043ad76d51d13dee45c477)

Signed-off-by: Dan Duval <dan.duval@oracle.com>