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authorHerbert Xu <herbert@gondor.apana.org.au>2009-01-16 14:40:54 +1100
committerHerbert Xu <herbert@gondor.apana.org.au>2009-01-27 17:11:13 +1100
commitbac1b5c4696f217afeac5b29874a337bc39da717 (patch)
tree7e13f7953ea27cff00ef5e45a3fd8e7dac4ea95a /crypto
parent29b37f42127f7da511560a40ea74f5047da40c13 (diff)
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crypto: blkcipher - Fix WARN_ON handling in walk_done
When we get left-over bits from a slow walk, it means that the underlying cipher has gone troppo. However, as we're handling that case we should ensure that the caller terminates the walk. This patch does this by setting walk->nbytes to zero. Reported-by: Roel Kluin <roel.kluin@gmail.com> Reported-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
-rw-r--r--crypto/blkcipher.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c
index 4a7e65c4df4..d70a41c002d 100644
--- a/crypto/blkcipher.c
+++ b/crypto/blkcipher.c
@@ -124,6 +124,7 @@ int blkcipher_walk_done(struct blkcipher_desc *desc,
scatterwalk_done(&walk->in, 0, nbytes);
scatterwalk_done(&walk->out, 1, nbytes);
+err:
walk->total = nbytes;
walk->nbytes = nbytes;
@@ -132,7 +133,6 @@ int blkcipher_walk_done(struct blkcipher_desc *desc,
return blkcipher_walk_next(desc, walk);
}
-err:
if (walk->iv != desc->info)
memcpy(desc->info, walk->iv, crypto_blkcipher_ivsize(tfm));
if (walk->buffer != walk->page)