crypto: caam - fix unchecked return value error

[ Upstream commit e30685204711a6be40dec2622606950ccd37dafe ]

error:
Unchecked return value (CHECKED_RETURN)
check_return: Calling sg_miter_next without checking return value

fix:
added check if(!sg_miter_next)

Fixes: 8a2a0dd35f2e ("crypto: caam - strip input zeros from RSA input buffer")
Signed-off-by: Gaurav Jain <gaurav.jain@nxp.com>
Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
Reviewed-by: Gaurav Jain <gaurav.jain@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index 6f3f81bb880b505797bd69bd7288083c1ceef029..01f9053db287bb3f070263250eb2906b4480a7ce 100644 (file)
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -194,7 +194,9 @@ static int caam_rsa_count_leading_zeros(struct scatterlist *sgl,
                if (len && *buff)
                        break;
 
-               sg_miter_next(&miter);
+               if (!sg_miter_next(&miter))
+                       break;
+
                buff = miter.addr;
                len = miter.length;