From 9f06a8d623b2c3aea09292b844e329fbfb401231 Mon Sep 17 00:00:00 2001 From: Behan Webster Date: Fri, 5 Sep 2014 16:03:34 -0700 Subject: [PATCH] Bluetooth: LLVMLinux: Remove VLAIS from bluetooth/amp.c MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Replaced the use of a Variable Length Array In Struct (VLAIS) with a C99 compliant equivalent. This patch allocates the appropriate amount of memory using an char array. The new code can be compiled with both gcc and clang. struct shash_desc contains a flexible array member member ctx declared with CRYPTO_MINALIGN_ATTR, so sizeof(struct shash_desc) aligns the beginning of the array declared after struct shash_desc with long long. No trailing padding is required because it is not a struct type that can be used in an array. The CRYPTO_MINALIGN_ATTR is required so that desc is aligned with long long as would be the case for a struct containing a member with CRYPTO_MINALIGN_ATTR. Signed-off-by: Behan Webster Signed-off-by: Mark Charlebois Signed-off-by: Jan-Simon Möller Signed-off-by: Marcel Holtmann --- net/bluetooth/amp.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/net/bluetooth/amp.c b/net/bluetooth/amp.c index 016cdb66df6c..2640d78f30b8 100644 --- a/net/bluetooth/amp.c +++ b/net/bluetooth/amp.c @@ -149,15 +149,14 @@ static int hmac_sha256(u8 *key, u8 ksize, char *plaintext, u8 psize, u8 *output) if (ret) { BT_DBG("crypto_ahash_setkey failed: err %d", ret); } else { - struct { - struct shash_desc shash; - char ctx[crypto_shash_descsize(tfm)]; - } desc; + char desc[sizeof(struct shash_desc) + + crypto_shash_descsize(tfm)] CRYPTO_MINALIGN_ATTR; + struct shash_desc *shash = (struct shash_desc *)desc; - desc.shash.tfm = tfm; - desc.shash.flags = CRYPTO_TFM_REQ_MAY_SLEEP; + shash->tfm = tfm; + shash->flags = CRYPTO_TFM_REQ_MAY_SLEEP; - ret = crypto_shash_digest(&desc.shash, plaintext, psize, + ret = crypto_shash_digest(shash, plaintext, psize, output); } -- 2.20.1