crypto: scatterwalk - Set the chain pointer indication bit
commit 41da8b5adba77e22584f8b45f9641504fa885308 upstream. 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. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -36,6 +36,7 @@ static inline void scatterwalk_sg_chain(struct scatterlist *sg1, int num,
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{
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sg_set_page(&sg1[num - 1], (void *)sg2, 0, 0);
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sg1[num - 1].page_link &= ~0x02;
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sg1[num - 1].page_link |= 0x01;
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}
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static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg)
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