From: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
To: linux-crypto@vger.kernel.org, linux-samsung-soc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, vzapolskiy@gmail.com,
        herbert@gondor.apana.org.au, naveenkrishna.ch@gmail.com,
        cpgs@samsung.com
Subject: [PATCH 7/9 v6] crypto:s5p-sss: validate iv before memcpy
Date: Fri, 07 Feb 2014 10:55:27 +0530
Message-id: <1391750727-27496-1-git-send-email-ch.naveen@samsung.com>
In-reply-to: <1389243640-13282-1-git-send-email-ch.naveen@samsung.com>
References: <1389243640-13282-1-git-send-email-ch.naveen@samsung.com>
DLP-Filter: Pass
Sender: linux-kernel-owner@vger.kernel.org

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

Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
---
changes since v5:
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 da1c8943..a890273 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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