crypto: do not free algorithm before using

crypto: do not free algorithm before using

In multiple functions, the algorithm fields are read after its reference
is dropped through crypto_mod_put. In this case, the algorithm memory
may be freed, resulting in use-after-free bugs. This patch delays the
put operation until the algorithm is never used.

Fixes: 6998e202d9b6 ("crypto: cbc - Convert to skcipher")
Fixes: 941563f8e2a4 ("crypto: cfb - add support for Cipher FeedBack mode")
Fixes: daa74392dcd9 ("crypto: pcbc - Convert to skcipher")
Cc: <stable@vger.kernel.org>
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>