4.14-stable review patch. If anyone has any objections, please let me know.
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From: Antoine Tenart antoine.tenart@bootlin.com
[ Upstream commit 666a9c70b04fccabde5cea5e680ae1ae92460a62 ]
This patch fixes the cache length computation as cache_len could end up being a negative value. The check between the queued size and the block size is updated to reflect the caching mechanism which can cache up to a full block size (included!).
Fixes: 809778e02cd4 ("crypto: inside-secure - fix hash when length is a multiple of a block") Signed-off-by: Antoine Tenart antoine.tenart@bootlin.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/crypto/inside-secure/safexcel_hash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/crypto/inside-secure/safexcel_hash.c +++ b/drivers/crypto/inside-secure/safexcel_hash.c @@ -185,7 +185,7 @@ static int safexcel_ahash_send_req(struc int i, queued, len, cache_len, extra, n_cdesc = 0, ret = 0;
queued = len = req->len - req->processed; - if (queued < crypto_ahash_blocksize(ahash)) + if (queued <= crypto_ahash_blocksize(ahash)) cache_len = queued; else cache_len = queued - areq->nbytes;