Return-path: Received: from mail-pa0-f51.google.com ([209.85.220.51]:35238 "EHLO mail-pa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753101AbaCFTyE (ORCPT ); Thu, 6 Mar 2014 14:54:04 -0500 Received: by mail-pa0-f51.google.com with SMTP id kq14so3123842pab.10 for ; Thu, 06 Mar 2014 11:54:02 -0800 (PST) From: behanw@converseincode.com To: linville@tuxdriver.com, johannes@sipsolutions.net, davem@davemloft.net Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, dwmw2@infradead.org, pageexec@freemail.hu, =?UTF-8?q?Jan-Simon=20M=C3=B6ller?= , Behan Webster , =?UTF-8?q?Vin=C3=ADcius=20Tinti?= , Mark Charlebois Subject: [PATCH] mac80211: LLVMLinux: Remove VLAIS usage from mac80211 Date: Thu, 6 Mar 2014 11:52:50 -0800 Message-Id: <1394135570-26730-1-git-send-email-behanw@converseincode.com> (sfid-20140306_205431_053287_456CC20F) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Jan-Simon Möller Replaced the use of a Variable Length Array In Struct (VLAIS) with a C99 compliant equivalent. This is the original VLAIS struct. struct { struct aead_request req; u8 priv[crypto_aead_reqsize(tfm)]; } aead_req; This patch instead allocates the appropriate amount of memory using an char array. The new code can be compiled with both gcc and clang. Signed-off-by: Jan-Simon Möller Signed-off-by: Behan Webster Signed-off-by: Vinícius Tinti Signed-off-by: Mark Charlebois --- net/mac80211/aes_ccm.c | 44 ++++++++++++++++++++++++++------------------ 1 file changed, 26 insertions(+), 18 deletions(-) diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c index 7c7df47..9612e95 100644 --- a/net/mac80211/aes_ccm.c +++ b/net/mac80211/aes_ccm.c @@ -23,12 +23,16 @@ void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, u8 *data, size_t data_len, u8 *mic) { struct scatterlist assoc, pt, ct[2]; - struct { - struct aead_request req; - u8 priv[crypto_aead_reqsize(tfm)]; - } aead_req; - memset(&aead_req, 0, sizeof(aead_req)); + char aead_req_data[sizeof(struct aead_request) + + crypto_aead_reqsize(tfm) + + CRYPTO_MINALIGN] CRYPTO_MINALIGN_ATTR; + + struct aead_request *aead_req + = (struct aead_request *) aead_req_data; + + memset(&aead_req_data, 0, (sizeof(struct aead_request)+ + crypto_aead_reqsize(tfm) + CRYPTO_MINALIGN)); sg_init_one(&pt, data, data_len); sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad)); @@ -36,23 +40,27 @@ void ieee80211_aes_ccm_encrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, sg_set_buf(&ct[0], data, data_len); sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN); - aead_request_set_tfm(&aead_req.req, tfm); - aead_request_set_assoc(&aead_req.req, &assoc, assoc.length); - aead_request_set_crypt(&aead_req.req, &pt, ct, data_len, b_0); + aead_request_set_tfm(aead_req, tfm); + aead_request_set_assoc(aead_req, &assoc, assoc.length); + aead_request_set_crypt(aead_req, &pt, ct, data_len, b_0); - crypto_aead_encrypt(&aead_req.req); + crypto_aead_encrypt(aead_req); } int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, u8 *data, size_t data_len, u8 *mic) { struct scatterlist assoc, pt, ct[2]; - struct { - struct aead_request req; - u8 priv[crypto_aead_reqsize(tfm)]; - } aead_req; - memset(&aead_req, 0, sizeof(aead_req)); + char aead_req_data[sizeof(struct aead_request) + + crypto_aead_reqsize(tfm) + + CRYPTO_MINALIGN] CRYPTO_MINALIGN_ATTR; + + struct aead_request *aead_req + = (struct aead_request *) aead_req_data; + + memset(&aead_req_data, 0, (sizeof(struct aead_request)+ + crypto_aead_reqsize(tfm) + CRYPTO_MINALIGN)); sg_init_one(&pt, data, data_len); sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad)); @@ -60,12 +68,12 @@ int ieee80211_aes_ccm_decrypt(struct crypto_aead *tfm, u8 *b_0, u8 *aad, sg_set_buf(&ct[0], data, data_len); sg_set_buf(&ct[1], mic, IEEE80211_CCMP_MIC_LEN); - aead_request_set_tfm(&aead_req.req, tfm); - aead_request_set_assoc(&aead_req.req, &assoc, assoc.length); - aead_request_set_crypt(&aead_req.req, ct, &pt, + aead_request_set_tfm(aead_req, tfm); + aead_request_set_assoc(aead_req, &assoc, assoc.length); + aead_request_set_crypt(aead_req, ct, &pt, data_len + IEEE80211_CCMP_MIC_LEN, b_0); - return crypto_aead_decrypt(&aead_req.req); + return crypto_aead_decrypt(aead_req); } struct crypto_aead *ieee80211_aes_key_setup_encrypt(const u8 key[]) -- 1.8.3.2