diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index 49cbdcba7883072decb2683857ebb8da856cd68c..999ba18495b0f6bef835109edc4a12c43bd9e7bb 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -374,6 +374,8 @@ static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes)
 		buf++;
 		(*nbytes)--;
 	}
+	if (!*nbytes)
+		return NULL;
 
 	val = kzalloc(*nbytes, GFP_DMA | GFP_KERNEL);
 	if (!val)