Commit 41da8b5a authored by Tom Lendacky's avatar Tom Lendacky Committed by Herbert Xu

crypto: scatterwalk - Set the chain pointer indication bit

The scatterwalk_crypto_chain function invokes the scatterwalk_sg_chain
function to chain two scatterlists, but the chain pointer indication
bit is not set.  When the resulting scatterlist is used, for example,
by sg_nents to count the number of scatterlist entries, a segfault occurs
because sg_nents does not follow the chain pointer to the chained scatterlist.

Update scatterwalk_sg_chain to set the chain pointer indication bit as is
done by the sg_chain function.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent fc019c71
...@@ -36,6 +36,7 @@ static inline void scatterwalk_sg_chain(struct scatterlist *sg1, int num, ...@@ -36,6 +36,7 @@ static inline void scatterwalk_sg_chain(struct scatterlist *sg1, int num,
{ {
sg_set_page(&sg1[num - 1], (void *)sg2, 0, 0); sg_set_page(&sg1[num - 1], (void *)sg2, 0, 0);
sg1[num - 1].page_link &= ~0x02; sg1[num - 1].page_link &= ~0x02;
sg1[num - 1].page_link |= 0x01;
} }
static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg) static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg)
......
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