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[MAC80211]: Add get_unaligned to ieee80211_get_radiotap_len

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ieee80211_get_radiotap_len() tries to dereference radiotap length without
taking care that it is completely unaligned and get_unaligned()
is required.

Signed-off-by: Andy Green <andy@warmcat.com>
Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Andy Green 2007-07-27 15:43:24 +02:00 committed by David S. Miller
parent 0ec0b7ac3c
commit dfe6e81dea
1 changed files with 2 additions and 1 deletions
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3
include/net/ieee80211_radiotap.h
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@ -40,6 +40,7 @@
#include <linux/if_ether.h>
#include <linux/kernel.h>
#include <asm/unaligned.h>
/* Radiotap header version (from official NetBSD feed) */
#define IEEE80211RADIOTAP_VERSION "1.5"
@ -261,7 +262,7 @@ static inline int ieee80211_get_radiotap_len(unsigned char *data)
struct ieee80211_radiotap_header *hdr =
(struct ieee80211_radiotap_header *)data;
return le16_to_cpu(hdr->it_len);
return le16_to_cpu(get_unaligned(&hdr->it_len));
}
#endif /* IEEE80211_RADIOTAP_H */