4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Antoine Tenart <antoine.tenart@xxxxxxxxxxx>
[ 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@xxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -187,7 +187,7 @@ 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;
