[3.16.y-ckt stable] Patch "crypto: algif_skcipher - Add key check exception for cipher_null" has been added to the 3.16.y-ckt tree

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    crypto: algif_skcipher - Add key check exception for cipher_null

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt25.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

---8<------------------------------------------------------------

>From c8f7691fa11023ada207422138c0808820d181d3 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert at gondor.apana.org.au>
Date: Mon, 11 Jan 2016 21:29:41 +0800
Subject: crypto: algif_skcipher - Add key check exception for cipher_null

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 at gondor.apana.org.au>
[bwh: Backported to 3.2: use crypto_ablkcipher_has_setkey()]
Signed-off-by: Ben Hutchings <ben at decadent.org.uk>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 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 f0037c0c36b7..584d70f7f824 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -760,7 +760,7 @@ 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);