[PATCH 4.9 102/130] libceph: make sure ceph_aes_crypt() IV is aligned

[Greg Kroah-Hartman]

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

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

From: Ilya Dryomov <idryomov@xxxxxxxxx>

commit 124f930b8cbc4ac11236e6eb1c5f008318864588 upstream.

... otherwise the crypto stack will align it for us with a GFP_ATOMIC
allocation and a memcpy() -- see skcipher_walk_first().

Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

--- a/net/ceph/crypto.c
+++ b/net/ceph/crypto.c
@@ -164,7 +164,7 @@ static int ceph_aes_crypt(const struct c
 	SKCIPHER_REQUEST_ON_STACK(req, tfm);
 	struct sg_table sgt;
 	struct scatterlist prealloc_sg;
-	char iv[AES_BLOCK_SIZE];
+	char iv[AES_BLOCK_SIZE] __aligned(8);
 	int pad_byte = AES_BLOCK_SIZE - (in_len & (AES_BLOCK_SIZE - 1));
 	int crypt_len = encrypt ? in_len + pad_byte : in_len;
 	int ret;