linux-kernel - [PATCH] crypto: caam: fix unchecked return value error

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Date:   Tue,  8 Aug 2023 12:55:25 +0200
From:   meenakshi.aggarwal@....com
To:     horia.geanta@....com, V.sethi@....com, pankaj.gupta@....com,
        gaurav.jain@....com, herbert@...dor.apana.org.au,
        davem@...emloft.net, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Meenakshi Aggarwal <meenakshi.aggarwal@....com>
Subject: [PATCH] crypto: caam: fix unchecked return value error

From: Gaurav Jain <gaurav.jain@....com>

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@....com>
Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@....com>
---
 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 72afc249d42f..7e08af751e4e 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -225,7 +225,9 @@ 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;
 
-- 
2.25.1