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From: Luca Coelho <luca@coelho.fi>
To: johannes@sipsolutions.net
Cc: linux-wireless@vger.kernel.org
Subject: [PATCH 1/2] mac80211: accept deauth frames in IBSS mode
Date: Fri,  4 Oct 2019 15:37:05 +0300	[thread overview]
Message-ID: <20191004123706.15768-2-luca@coelho.fi> (raw)
In-Reply-To: <20191004123706.15768-1-luca@coelho.fi>

From: Johannes Berg <johannes.berg@intel.com>

We can process deauth frames and all, but we drop them very
early in the RX path today - this could never have worked.

Fixes: 2cc59e784b54 ("mac80211: reply to AUTH with DEAUTH if sta allocation fails in IBSS")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 net/mac80211/rx.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 768d14c9a716..0e05ff037672 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -3467,9 +3467,18 @@ ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
 	case cpu_to_le16(IEEE80211_STYPE_PROBE_RESP):
 		/* process for all: mesh, mlme, ibss */
 		break;
+	case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
+		if (is_multicast_ether_addr(mgmt->da) &&
+		    !is_broadcast_ether_addr(mgmt->da))
+			return RX_DROP_MONITOR;
+
+		/* process only for station/IBSS */
+		if (sdata->vif.type != NL80211_IFTYPE_STATION &&
+		    sdata->vif.type != NL80211_IFTYPE_ADHOC)
+			return RX_DROP_MONITOR;
+		break;
 	case cpu_to_le16(IEEE80211_STYPE_ASSOC_RESP):
 	case cpu_to_le16(IEEE80211_STYPE_REASSOC_RESP):
-	case cpu_to_le16(IEEE80211_STYPE_DEAUTH):
 	case cpu_to_le16(IEEE80211_STYPE_DISASSOC):
 		if (is_multicast_ether_addr(mgmt->da) &&
 		    !is_broadcast_ether_addr(mgmt->da))
-- 
2.23.0


  reply	other threads:[~2019-10-04 12:37 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-04 12:37 [PATCH 0/2] cfg80211/mac80211 patches from our internal tree 2019-10-04 Luca Coelho
2019-10-04 12:37 ` Luca Coelho [this message]
2019-10-04 12:37 ` [PATCH 2/2] cfg80211: fix a bunch of RCU issues in multi-bssid code Luca Coelho

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