[PATCH 7/8 v4] crypto:s5p-sss: validate iv before memcpy

[Naveen Krishna Chatradhi]

This patch adds code to validate "iv" buffer before trying to
memcpy the contents

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@xxxxxxxxxxx>
---
Changes since v3:
None

 drivers/crypto/s5p-sss.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c
index 69130b2..f7c66c7 100644
--- a/drivers/crypto/s5p-sss.c
+++ b/drivers/crypto/s5p-sss.c
@@ -380,7 +380,8 @@ static void s5p_set_aes(struct s5p_aes_dev *dev,
 {
 	void __iomem *keystart;
 
-	memcpy(dev->aes_ioaddr + SSS_REG_AES_IV_DATA (0), iv, 0x10);
+	if (iv)
+		memcpy(dev->aes_ioaddr + SSS_REG_AES_IV_DATA (0), iv, 0x10);
 
 	if (keylen == AES_KEYSIZE_256)
 		keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(0);
-- 
1.7.9.5

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