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Subject[PATCH 4.9 33/88] crypto: mcryptd - pass through absence of ->setkey()
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4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Eric Biggers <ebiggers@google.com>

commit fa59b92d299f2787e6bae1ff078ee0982e80211f upstream.

When the mcryptd template is used to wrap an unkeyed hash algorithm,
don't install a ->setkey() method to the mcryptd instance. This change
is necessary for mcryptd to keep working with unkeyed hash algorithms
once we start enforcing that ->setkey() is called when present.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
crypto/mcryptd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/crypto/mcryptd.c
+++ b/crypto/mcryptd.c
@@ -534,7 +534,8 @@ static int mcryptd_create_hash(struct cr
inst->alg.finup = mcryptd_hash_finup_enqueue;
inst->alg.export = mcryptd_hash_export;
inst->alg.import = mcryptd_hash_import;
- inst->alg.setkey = mcryptd_hash_setkey;
+ if (crypto_hash_alg_has_setkey(halg))
+ inst->alg.setkey = mcryptd_hash_setkey;
inst->alg.digest = mcryptd_hash_digest_enqueue;

err = ahash_register_instance(tmpl, inst);

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