linux-kernel - [PATCH] crypto: do not attempt to write to readonly variable

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Date:	Mon, 21 Feb 2011 15:27:22 +0100
From:	David Sterba <dsterba@...e.cz>
To:	linux-crypto@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, David Sterba <dsterba@...e.cz>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH] crypto: do not attempt to write to readonly variable

Commit da7f033ddc9fdeb (”crypto: cryptomgr - Add test infrastructure”) added a
const to variable which is later used as target buffer of memcpy.

crypto/tcrypt.c:217:12: warning: passing 'const char (*)[128]' to parameter of type 'void *' discards qualifiers
                                memset(&iv, 0xff, iv_len);


crypto/tcrypt.c:test_cipher_speed()

-       unsigned char *key, iv[128];
+       const char *key, iv[128];
...
        memset(&iv, 0xff, iv_len);

CC: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: David Sterba <dsterba@...e.cz>
---
 crypto/tcrypt.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 9aac5e5..e912ea5 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -146,7 +146,8 @@ static void test_cipher_speed(const char *algo, int enc, unsigned int sec,
 			      unsigned int tcount, u8 *keysize)
 {
 	unsigned int ret, i, j, iv_len;
-	const char *key, iv[128];
+	const char *key;
+	char iv[128];
 	struct crypto_blkcipher *tfm;
 	struct blkcipher_desc desc;
 	const char *e;
-- 
1.7.4

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