Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

[linux-imx.git] / net / mac80211 / rx.c

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 23dbcfc69b3b7f09ffc35c81d03dddc38d36da5a..2c5a79bd3777f5c313d3205a1154ef6b714a8d4d 100644 (file)
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -936,8 +936,14 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
        struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
 
-       /* Drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.2.9) */
-       if (rx->sta && !is_multicast_ether_addr(hdr->addr1)) {
+       /*
+        * Drop duplicate 802.11 retransmissions
+        * (IEEE 802.11-2012: 9.3.2.10 "Duplicate detection and recovery")
+        */
+       if (rx->skb->len >= 24 && rx->sta &&
+           !ieee80211_is_ctl(hdr->frame_control) &&
+           !ieee80211_is_qos_nullfunc(hdr->frame_control) &&
+           !is_multicast_ether_addr(hdr->addr1)) {
                if (unlikely(ieee80211_has_retry(hdr->frame_control) &&
                             rx->sta->last_seq_ctrl[rx->seqno_idx] ==
                             hdr->seq_ctrl)) {