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authorEmmanuel Grumbach <emmanuel.grumbach@intel.com>2018-12-03 21:16:07 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-12-13 09:18:54 +0100
commit7b6d932725ec18c1d84892b73c9da4d624939955 (patch)
tree65d0c334bc2479d6ee5ff46839778f404cc4c28d
parentbbc4242a9c2e3c97a5a8e7822b9c27915599f0c4 (diff)
mac80211: ignore NullFunc frames in the duplicate detection
commit 990d71846a0b7281bd933c34d734e6afc7408e7e upstream. NullFunc packets should never be duplicate just like QoS-NullFunc packets. We saw a client that enters / exits power save with NullFunc frames (and not with QoS-NullFunc) despite the fact that the association supports HT. This specific client also re-uses a non-zero sequence number for different NullFunc frames. At some point, the client had to send a retransmission of the NullFunc frame and we dropped it, leading to a misalignment in the power save state. Fix this by never consider a NullFunc frame as duplicate, just like we do for QoS NullFunc frames. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=201449 CC: <stable@vger.kernel.org> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/mac80211/rx.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index dddd498e1338..9e19ddbcb06e 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1254,6 +1254,7 @@ ieee80211_rx_h_check_dup(struct ieee80211_rx_data *rx)
return RX_CONTINUE;
if (ieee80211_is_ctl(hdr->frame_control) ||
+ ieee80211_is_nullfunc(hdr->frame_control) ||
ieee80211_is_qos_nullfunc(hdr->frame_control) ||
is_multicast_ether_addr(hdr->addr1))
return RX_CONTINUE;