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Commit | Line | Data |
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2d1c2790 GKH |
1 | From f7fbf70ee9db6da6033ae50d100e017ac1f26555 Mon Sep 17 00:00:00 2001 |
2 | From: Javier Cardona <javier@cozybit.com> | |
3 | Date: Thu, 25 Oct 2012 11:10:18 -0700 | |
4 | Subject: mac80211: don't inspect Sequence Control field on control frames | |
5 | ||
6 | From: Javier Cardona <javier@cozybit.com> | |
7 | ||
8 | commit f7fbf70ee9db6da6033ae50d100e017ac1f26555 upstream. | |
9 | ||
10 | Per IEEE Std. 802.11-2012, Sec 8.2.4.4.1, the sequence Control field is | |
11 | not present in control frames. We noticed this problem when processing | |
12 | Block Ack Requests. | |
13 | ||
14 | Signed-off-by: Javier Cardona <javier@cozybit.com> | |
15 | Signed-off-by: Javier Lopez <jlopex@cozybit.com> | |
16 | Signed-off-by: Johannes Berg <johannes.berg@intel.com> | |
17 | Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
18 | ||
19 | --- | |
20 | net/mac80211/rx.c | 4 ++++ | |
21 | 1 file changed, 4 insertions(+) | |
22 | ||
23 | --- a/net/mac80211/rx.c | |
24 | +++ b/net/mac80211/rx.c | |
25 | @@ -1422,6 +1422,10 @@ ieee80211_rx_h_defragment(struct ieee802 | |
26 | ||
27 | hdr = (struct ieee80211_hdr *)rx->skb->data; | |
28 | fc = hdr->frame_control; | |
29 | + | |
30 | + if (ieee80211_is_ctl(fc)) | |
31 | + return RX_CONTINUE; | |
32 | + | |
33 | sc = le16_to_cpu(hdr->seq_ctrl); | |
34 | frag = sc & IEEE80211_SCTL_FRAG; | |
35 |