Commit f8739155 authored by Corentin Labbe's avatar Corentin Labbe Committed by Herbert Xu

crypto: sun4i-ss - Fix invalid calculation of hash end

When nbytes < 4, end is wronlgy set to a negative value which, due to
uint, is then interpreted to a large value leading to a deadlock in the
following code.

This patch fix this problem.

Fixes: 6298e948 ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator")
Signed-off-by: default avatarCorentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 179930a6
......@@ -240,6 +240,9 @@ static int sun4i_hash(struct ahash_request *areq)
}
} else {
/* Since we have the flag final, we can go up to modulo 4 */
if (areq->nbytes < 4)
end = 0;
else
end = ((areq->nbytes + op->len) / 4) * 4 - op->len;
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment