[MAC80211]: Add get_unaligned to ieee80211_get_radiotap_len

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 <[email protected]> Signed-off-by: Jiri Benc <[email protected]> Signed-off-by: John W. Linville <[email protected]>
cail · Oct 10, 2007 · dfe6e81 · dfe6e81
1 parent 0ec0b7a
commit dfe6e81
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
@@ -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 */