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[PATCH 4.3 165/200] crypto: algif_skcipher - Add key check exception for cipher_null

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  [PATCH 4.3 165/200] crypto: algif_skcipher - Add key check exception for cipher_null Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-02-15 01:00 +0100

#1333881 — [PATCH 4.3 165/200] crypto: algif_skcipher - Add key check exception for cipher_null

4.3-stable review patch.  If anyone has any objections, please let me know.

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

From: Herbert Xu <herbert@gondor.apana.org.au>

commit 6e8d8ecf438792ecf7a3207488fb4eebc4edb040 upstream.

This patch adds an exception to the key check so that cipher_null
users may continue to use algif_skcipher without setting a key.

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

---
 crypto/algif_skcipher.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -978,7 +978,7 @@ static int skcipher_accept_parent(void *
 {
 	struct skcipher_tfm *tfm = private;
 
-	if (!tfm->has_key)
+	if (!tfm->has_key && crypto_skcipher_has_setkey(tfm->skcipher))
 		return -ENOKEY;
 
 	return skcipher_accept_parent_common(private, sk);

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