linux-kernel - [PATCH 3.10 011/319] crypto: algif_skcipher - Add key check exception for cipher

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Message-Id: <1486322063-7558-12-git-send-email-w@1wt.eu>
Date:   Sun,  5 Feb 2017 20:09:15 +0100
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        Andrey Ryabinin <aryabinin@...tuozzo.com>,
        Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 011/319] crypto: algif_skcipher - Add key check exception for cipher_null

From: Herbert Xu <herbert@...dor.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.

Cc: stable@...r.kernel.org
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Andrey Ryabinin <aryabinin@...tuozzo.com>
Signed-off-by: Willy Tarreau <w@....eu>
---
 crypto/algif_skcipher.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index db5f0f0..4677a45 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -759,7 +759,7 @@ static int skcipher_accept_parent(void *private, struct sock *sk)
 {
 	struct skcipher_tfm *tfm = private;
 
-	if (!tfm->has_key)
+	if (!tfm->has_key && crypto_ablkcipher_has_setkey(tfm->skcipher))
 		return -ENOKEY;
 
 	return skcipher_accept_parent_common(private, sk);
-- 
2.8.0.rc2.1.gbe9624a