[PATCH 5.15 103/511] crypto: caam - fix unchecked return value error

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Gaurav Jain <gaurav.jain@xxxxxxx>

[ 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@xxxxxxx>
Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@xxxxxxx>
Reviewed-by: Gaurav Jain <gaurav.jain@xxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/crypto/caam/caampkc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index 8867275767101..51b48b57266a6 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -223,7 +223,9 @@ 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;
 
-- 
2.40.1






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