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authorDaniel Drake <dsd@gentoo.org>2007-11-22 22:03:42 +0000
committerJohn W. Linville <linville@tuxdriver.com>2007-11-29 18:08:47 -0500
commit01e1f045e65b683fe7203b1e16a915bbb94c15fe (patch)
tree480686e2f3c5c49bf56ae06ef98998335bdaa38a
parenta10605e599a7873417043fe2bb559abe719f8a1a (diff)
ieee80211: fix unaligned access in ieee80211_copy_snap
There is no guarantee that data+SNAP_SIZE will reside on an even numbered address, so doing a 16 bit read will cause an unaligned access in some situations. Based on a patch from Jun Sun. Signed-off-by: Daniel Drake <dsd@gentoo.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--net/ieee80211/ieee80211_tx.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ieee80211/ieee80211_tx.c b/net/ieee80211/ieee80211_tx.c
index a4c3c51140a..6d06f1385e2 100644
--- a/net/ieee80211/ieee80211_tx.c
+++ b/net/ieee80211/ieee80211_tx.c
@@ -144,7 +144,8 @@ static int ieee80211_copy_snap(u8 * data, u16 h_proto)
snap->oui[1] = oui[1];
snap->oui[2] = oui[2];
- *(u16 *) (data + SNAP_SIZE) = htons(h_proto);
+ h_proto = htons(h_proto);
+ memcpy(data + SNAP_SIZE, &h_proto, sizeof(u16));
return SNAP_SIZE + sizeof(u16);
}