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Commit f7fbf70e authored by Javier Cardona's avatar Javier Cardona Committed by Johannes Berg
Browse files

mac80211: don't inspect Sequence Control field on control frames 



Per IEEE Std. 802.11-2012, Sec 8.2.4.4.1, the sequence Control field is
not present in control frames.  We noticed this problem when processing
Block Ack Requests.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarJavier Cardona <javier@cozybit.com>
Signed-off-by: default avatarJavier Lopez <jlopex@cozybit.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 2ac64cd1

net/mac80211/rx.c

+4 −0
Original line number Diff line number Diff line
@@ -1462,6 +1462,10 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) 


	hdr = (struct ieee80211_hdr *)rx->skb->data;

	fc = hdr->frame_control;



	if (ieee80211_is_ctl(fc))

		return RX_CONTINUE;



	sc = le16_to_cpu(hdr->seq_ctrl);

	frag = sc & IEEE80211_SCTL_FRAG;