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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2013-11-12 11:46:10 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-11 22:34:10 -0800 |
| commit | 941f77dc3c2b264051fba4726461fec919822041 (patch) | |
| tree | 1b0a0f5e794dc8d0bec5f600124bba18c3593976 | |
| parent | 50b673d2fefba609f4a84e889277c5e12ce6a93d (diff) | |
| download | lwn-941f77dc3c2b264051fba4726461fec919822041.tar.gz lwn-941f77dc3c2b264051fba4726461fec919822041.zip | |
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>
| -rw-r--r-- | include/crypto/scatterwalk.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/crypto/scatterwalk.h b/include/crypto/scatterwalk.h index 3744d2a642df..09ef1a0c5499 100644 --- a/include/crypto/scatterwalk.h +++ b/include/crypto/scatterwalk.h @@ -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); sg1[num - 1].page_link &= ~0x02; + sg1[num - 1].page_link |= 0x01; } static inline struct scatterlist *scatterwalk_sg_next(struct scatterlist *sg) |