[PATCH 3.11 163/208] crypto: scatterwalk - Use sg_chain_ptr on chain entries

From: Luis Henriques
Date: Thu Dec 19 2013 - 07:14:43 EST


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

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

From: Tom Lendacky <thomas.lendacky@xxxxxxx>

commit 389a5390583a18e45bc4abd4439291abec5e7a63 upstream.

Now that scatterwalk_sg_chain sets the chain pointer bit the sg_page
call in scatterwalk_sg_next hits a BUG_ON when CONFIG_DEBUG_SG is
enabled. Use sg_chain_ptr instead of sg_page on a chain entry.

Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
include/crypto/scatterwalk.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/crypto/scatterwalk.h b/include/crypto/scatterwalk.h
index 09ef1a0..2cddd2b 100644
--- a/include/crypto/scatterwalk.h
+++ b/include/crypto/scatterwalk.h
@@ -44,7 +44,7 @@ static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg)
if (sg_is_last(sg))
return NULL;

- return (++sg)->length ? sg : (void *)sg_page(sg);
+ return (++sg)->length ? sg : sg_chain_ptr(sg);
}

static inline void scatterwalk_crypto_chain(struct scatterlist *head,
--
1.8.3.2

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