Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-23 20:51:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

mac80211: fix blockack-req processing

Browse Source 
Daniel reported that the paged RX changes had
broken blockack request frame processing due
to using data that wasn't really part of the
skb data.

Fix this using skb_copy_bits() for the needed
data. As a side effect, this adds a check on
processing too short frames, which previously
this code could do.

Reported-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2010-05-30 14:52:58 +02:00 committed by John W. Linville
parent 397f385bdb
commit 8ae5977ff9
1 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
net/mac80211/rx.c
View File

@ -1818,17 +1818,26 @@ ieee80211_rx_h_ctrl(struct ieee80211_rx_data *rx, struct sk_buff_head *frames)
return RX_CONTINUE;
if (ieee80211_is_back_req(bar->frame_control)) {
struct {
__le16 control, start_seq_num;
} __packed bar_data;
if (!rx->sta)
return RX_DROP_MONITOR;
if (skb_copy_bits(skb, offsetof(struct ieee80211_bar, control),
&bar_data, sizeof(bar_data)))
return RX_DROP_MONITOR;
spin_lock(&rx->sta->lock);
tid = le16_to_cpu(bar->control) >> 12;
tid = le16_to_cpu(bar_data.control) >> 12;
if (!rx->sta->ampdu_mlme.tid_active_rx[tid]) {
spin_unlock(&rx->sta->lock);
return RX_DROP_MONITOR;
}
tid_agg_rx = rx->sta->ampdu_mlme.tid_rx[tid];
start_seq_num = le16_to_cpu(bar->start_seq_num) >> 4;
start_seq_num = le16_to_cpu(bar_data.start_seq_num) >> 4;
/* reset session timer */
if (tid_agg_rx->timeout)