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mac80211: fix unaligned access in ieee80211_wep_encrypt_data 

Signed-off-by: Ivan Kuten <ivan.kuten@promwad.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ivan Kuten 2008-11-24 15:17:54 -05:00 committed by John W. Linville
parent b50563a685
commit 860c6e6a15
1 changed files with 4 additions and 3 deletions
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7
net/mac80211/wep.c
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@ -17,6 +17,7 @@
#include <linux/err.h> #include <linux/err.h>
#include <linux/mm.h> #include <linux/mm.h>
#include <linux/scatterlist.h> #include <linux/scatterlist.h>
#include <asm/unaligned.h>
#include <net/mac80211.h> #include <net/mac80211.h>
#include "ieee80211_i.h" #include "ieee80211_i.h"
@ -125,10 +126,10 @@ void ieee80211_wep_encrypt_data(struct crypto_blkcipher *tfm, u8 *rc4key,
{ {
struct blkcipher_desc desc = { .tfm = tfm }; struct blkcipher_desc desc = { .tfm = tfm };
struct scatterlist sg; struct scatterlist sg;
__le32 *icv; __le32 icv;
icv = (__le32 *)(data + data_len); icv = cpu_to_le32(~crc32_le(~0, data, data_len));
*icv = cpu_to_le32(~crc32_le(~0, data, data_len)); put_unaligned(icv, (__le32 *)(data + data_len));
crypto_blkcipher_setkey(tfm, rc4key, klen); crypto_blkcipher_setkey(tfm, rc4key, klen);
sg_init_one(&sg, data, data_len + WEP_ICV_LEN); sg_init_one(&sg, data, data_len + WEP_ICV_LEN);