kali-wifi-injection-chan.c.patch

--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -814,8 +814,10 @@ int cfg80211_set_monitor_channel(struct
 {
 	if (!rdev->ops->set_monitor_channel)
 		return -EOPNOTSUPP;
-	if (!cfg80211_has_monitors_only(rdev))
-		return -EBUSY;
+	// Always allow user to change channel, even if there is another normal
+	// virtual interface using the device.
+	//if (!cfg80211_has_monitors_only(rdev))
+	//	return -EBUSY;
 
 	return rdev_set_monitor_channel(rdev, chandef);
 }