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authorTom Lendacky <thomas.lendacky@amd.com>2013-11-12 21:46:10 +0400
committerHerbert Xu <herbert@gondor.apana.org.au>2013-11-28 18:16:24 +0400
commit41da8b5adba77e22584f8b45f9641504fa885308 (patch)
treeba46121284727741ee2d71a0140ad768145cc845 /include/crypto
parentfc019c7122dfcd69c50142b57a735539aec5da95 (diff)
downloadlinux-41da8b5adba77e22584f8b45f9641504fa885308.tar.xz
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: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
-rw-r--r--include/crypto/scatterwalk.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/crypto/scatterwalk.h b/include/crypto/scatterwalk.h
index 13621cc8cf4c..64ebede184f1 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)