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crypto: blkcipher - Fix WARN_ON handling in walk_done

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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 <[email protected]>
Reported-by: Huang Ying <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Herbert Xu 2009-01-16 14:40:54 +11:00
commit bac1b5c469
1 changed files with 1 additions and 1 deletions
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2
crypto/blkcipher.c
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@ -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)