[PATCH 3/3] crypto: algif_skcipher - increase private contex space for async request

[Tadeusz Struk <tadeusz.struk@intel.com>]

The private context space that was allocated for the async request was too
small. It accidentally worked fine (at least with the qat driver) because
the qat driveri, by mistake, allocated too much.
The problem started to show up since the qat driver issue has been fixed in
commit: 7768fb2ee.

We also need another version of this patch applicable to the code before
skcipher conversion that adds sizeof(struct ablkcipher_request)

Cc: <stable@vger.kernel.org> # 4.4.x-
Signed-off-by: Tadeusz Struk <tadeusz.struk@intel.com>
---
 crypto/algif_skcipher.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c
index 78529ce..298605d 100644
--- a/crypto/algif_skcipher.c
+++ b/crypto/algif_skcipher.c
@@ -69,10 +69,12 @@ struct skcipher_async_req {
 };
 
 #define GET_SREQ(areq, ctx) (struct skcipher_async_req *)((char *)areq + \
-	crypto_skcipher_reqsize(crypto_skcipher_reqtfm(&ctx->req)))
+	crypto_skcipher_reqsize(crypto_skcipher_reqtfm(&ctx->req)) + \
+	sizeof(struct skcipher_request))
 
 #define GET_REQ_SIZE(ctx) \
-	crypto_skcipher_reqsize(crypto_skcipher_reqtfm(&ctx->req))
+	crypto_skcipher_reqsize(crypto_skcipher_reqtfm(&ctx->req)) + \
+	sizeof(struct skcipher_request)
 
 #define GET_IV_SIZE(ctx) \
 	crypto_skcipher_ivsize(crypto_skcipher_reqtfm(&ctx->req))