diff mbox series

[6/8] wifi: mac80211: drop injection on disabled-chan monitor

Message ID 20240206164849.9c03dcf67dbe.Ib86a851c274c440908c663f6dd774b79bfc3965d@changeid
State New
Headers show
Series cfg80211/mac80211 patches from our internal tree 2024-02-06 | expand

Commit Message

Korenblit, Miriam Rachel Feb. 6, 2024, 2:54 p.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

If the driver uses the new IEEE80211_CHAN_CAN_MONITOR, we
may monitor on channels that are, e.g. via regulatory,
otherwise considered disabled. However, we really shouldn't
transmit on them, so prevent that.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/tx.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 68a48abc7287..02ef09edb9e4 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -5,7 +5,7 @@ 
  * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
  * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
  * Copyright 2013-2014  Intel Mobile Communications GmbH
- * Copyright (C) 2018-2022 Intel Corporation
+ * Copyright (C) 2018-2024 Intel Corporation
  *
  * Transmit and frame generation functions.
  */
@@ -2398,6 +2398,14 @@  netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
 	else
 		goto fail_rcu;
 
+	/*
+	 * If driver/HW supports IEEE80211_CHAN_CAN_MONITOR we still
+	 * shouldn't transmit on disabled channels.
+	 */
+	if (!cfg80211_chandef_usable(local->hw.wiphy, chandef,
+				     IEEE80211_CHAN_DISABLED))
+		goto fail_rcu;
+
 	/*
 	 * Frame injection is not allowed if beaconing is not allowed
 	 * or if we need radar detection. Beaconing is usually not allowed when