linux-kernel - [PATCH 2/2] crypto: caamhash.c: fix addressing of struct member

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Date:	Thu, 14 Aug 2014 13:51:57 +0300
From:	Cristian Stoica <cristian.stoica@...escale.com>
To:	<herbert@...dor.apana.org.au>, <horia.geanta@...escale.com>
CC:	<linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<davem@...emloft.net>
Subject: [PATCH 2/2] crypto: caamhash.c: fix addressing of struct member

buf_0 and buf_1 in caam_hash_state are not next to each other.
Accessing buf_1 is incorrect from &buf_0 with an offset of only
size_of(buf_0). The same issue is also with buflen_0 and buflen_1

Cc: <stable@...r.kernel.org> # 3.13+
Signed-off-by: Cristian Stoica <cristian.stoica@...escale.com>
---
 drivers/crypto/caam/caamhash.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index 061f3fb..f347ab7 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -1417,9 +1417,9 @@ static int ahash_update_first(struct ahash_request *req)
 	struct device *jrdev = ctx->jrdev;
 	gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG |
 		       CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC;
-	u8 *next_buf = state->buf_0 + state->current_buf *
-		       CAAM_MAX_HASH_BLOCK_SIZE;
-	int *next_buflen = &state->buflen_0 + state->current_buf;
+	u8 *next_buf = state->current_buf ? state->buf_1 : state->buf_0;
+	int *next_buflen = state->current_buf ?
+		&state->buflen_1 : &state->buflen_0;
 	int to_hash;
 	u32 *sh_desc = ctx->sh_desc_update_first, *desc;
 	dma_addr_t ptr = ctx->sh_desc_update_first_dma;
-- 
1.8.3.1

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