[PATCH v4] mac80211: LLVMLinux: Remove VLAIS usage from mac80211
From: <hidden>
Date: 2014-03-21 06:39:41
Also in:
linux-wireless, lkml
Subsystem:
mac80211, the rest · Maintainers:
Johannes Berg, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2014-03-21 · Re: [PATCH v4] mac80211: LLVMLinux: Remove VLAIS usage from mac80211 · Johannes Berg <johannes@sipsolutions.net>
From: Jan-Simon Möller <redacted>
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 <redacted>
Signed-off-by: Behan Webster <behanw-k/hB3zQhLwledRVtV/plodBPR1lH4CV8@public.gmane.org>
Signed-off-by: Vinícius Tinti <redacted>
Signed-off-by: Mark Charlebois <redacted>
---
net/mac80211/aes_ccm.c | 37 ++++++++++++++++++-------------------
1 file changed, 18 insertions(+), 19 deletions(-)
diff --git a/net/mac80211/aes_ccm.c b/net/mac80211/aes_ccm.c
index 7c7df47..71e2abd 100644
--- a/net/mac80211/aes_ccm.c
+++ b/net/mac80211/aes_ccm.c@@ -23,12 +23,12 @@ 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)] + __aligned(__alignof__(struct aead_request)); + struct aead_request *aead_req = (void *) aead_req_data; + memset(aead_req, 0, sizeof(aead_req_data)); sg_init_one(&pt, data, data_len); sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad));
@@ -36,23 +36,22 @@ 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)] + __aligned(__alignof__(struct aead_request)); + struct aead_request *aead_req = (void *) aead_req_data; + memset(aead_req, 0, sizeof(aead_req_data)); sg_init_one(&pt, data, data_len); sg_init_one(&assoc, &aad[2], be16_to_cpup((__be16 *)aad));
@@ -60,12 +59,12 @@ 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
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