From: Johannes Berg <johannes@sipsolutions.net>
To: John Linville <linville@tuxdriver.com>
Cc: linux-wireless <linux-wireless@vger.kernel.org>
Subject: [PATCH 2.6.30] mac80211: fix alignment calculation bug
Date: Tue, 21 Apr 2009 01:36:59 +0200 [thread overview]
Message-ID: <1240270619.17388.2.camel@johannes.local> (raw)
When checking whether or not a given frame needs to be
moved to be properly aligned to a 4-byte boundary, we
use & 4 which wasn't intended, this code should check
the lowest two bits.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
---
net/mac80211/rx.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- wireless-testing.orig/net/mac80211/rx.c 2009-04-21 01:32:59.000000000 +0200
+++ wireless-testing/net/mac80211/rx.c 2009-04-21 01:33:22.000000000 +0200
@@ -1397,7 +1397,7 @@ ieee80211_deliver_skb(struct ieee80211_r
* mac80211. That also explains the __skb_push()
* below.
*/
- align = (unsigned long)skb->data & 4;
+ align = (unsigned long)skb->data & 3;
if (align) {
if (WARN_ON(skb_headroom(skb) < 3)) {
dev_kfree_skb(skb);
reply other threads:[~2009-04-20 23:37 UTC|newest]
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