A couple of fixes:

* fix 160 MHz channel switch in mac80211
  * fix a staging driver to not deadlock due to some
    recent cfg80211 changes
  * fix NULL-ptr deref if cfg80211 returns -EINPROGRESS
    to wext (syzbot)
  * pause TX in mac80211 in type change to prevent crashes
    (syzbot)
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Merge tag 'mac80211-for-net-2021-01-26' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
A couple of fixes:
 * fix 160 MHz channel switch in mac80211
 * fix a staging driver to not deadlock due to some
   recent cfg80211 changes
 * fix NULL-ptr deref if cfg80211 returns -EINPROGRESS
   to wext (syzbot)
 * pause TX in mac80211 in type change to prevent crashes
   (syzbot)

* tag 'mac80211-for-net-2021-01-26' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211:
  staging: rtl8723bs: fix wireless regulatory API misuse
  mac80211: pause TX while changing interface type
  wext: fix NULL-ptr-dereference with cfg80211's lack of commit()
  mac80211: 160MHz with extended NSS BW in CSA
====================

Link: https://lore.kernel.org/r/20210126130529.75225-1-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/staging/rtl8723bs/include/rtw_wifi_regd.h

@@ -20,9 +20,9 @@ enum country_code_type_t {
 	COUNTRY_CODE_MAX
 };
 
-int rtw_regd_init(struct adapter *padapter,
-	void (*reg_notifier)(struct wiphy *wiphy,
-		struct regulatory_request *request));
+void rtw_regd_init(struct wiphy *wiphy,
+		   void (*reg_notifier)(struct wiphy *wiphy,
+					struct regulatory_request *request));
 void rtw_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request);
 
 

drivers/staging/rtl8723bs/os_dep/ioctl_cfg80211.c

@@ -3211,9 +3211,6 @@ void rtw_cfg80211_init_wiphy(struct adapter *padapter)
 			rtw_cfg80211_init_ht_capab(&bands->ht_cap, NL80211_BAND_2GHZ, rf_type);
 	}
 
-	/* init regulary domain */
-	rtw_regd_init(padapter, rtw_reg_notifier);
-
 	/* copy mac_addr to wiphy */
 	memcpy(wiphy->perm_addr, padapter->eeprompriv.mac_addr, ETH_ALEN);
 
@@ -3328,6 +3325,9 @@ int rtw_wdev_alloc(struct adapter *padapter, struct device *dev)
 	*((struct adapter **)wiphy_priv(wiphy)) = padapter;
 	rtw_cfg80211_preinit_wiphy(padapter, wiphy);
 
+	/* init regulary domain */
+	rtw_regd_init(wiphy, rtw_reg_notifier);
+
 	ret = wiphy_register(wiphy);
 	if (ret < 0) {
 		DBG_8192C("Couldn't register wiphy device\n");

drivers/staging/rtl8723bs/os_dep/wifi_regd.c

@@ -139,15 +139,11 @@ static void _rtw_regd_init_wiphy(struct rtw_regulatory *reg,
 	_rtw_reg_apply_flags(wiphy);
 }
 
-int rtw_regd_init(struct adapter *padapter,
-		  void (*reg_notifier)(struct wiphy *wiphy,
-				       struct regulatory_request *request))
+void rtw_regd_init(struct wiphy *wiphy,
+		   void (*reg_notifier)(struct wiphy *wiphy,
+					struct regulatory_request *request))
 {
-	struct wiphy *wiphy = padapter->rtw_wdev->wiphy;
-
 	_rtw_regd_init_wiphy(NULL, wiphy, reg_notifier);
-
-	return 0;
 }
 
 void rtw_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)

net/mac80211/ieee80211_i.h

@@ -1078,6 +1078,7 @@ enum queue_stop_reason {
 	IEEE80211_QUEUE_STOP_REASON_FLUSH,
 	IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
 	IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
+	IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE,
 
 	IEEE80211_QUEUE_STOP_REASONS,
 };

net/mac80211/iface.c

@@ -1617,6 +1617,10 @@ static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
 	if (ret)
 		return ret;
 
+	ieee80211_stop_vif_queues(local, sdata,
+				  IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
+	synchronize_net();
+
 	ieee80211_do_stop(sdata, false);
 
 	ieee80211_teardown_sdata(sdata);
@@ -1639,6 +1643,8 @@ static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
 	err = ieee80211_do_open(&sdata->wdev, false);
 	WARN(err, "type change: do_open returned %d", err);
 
+	ieee80211_wake_vif_queues(local, sdata,
+				  IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
 	return ret;
 }
 

net/mac80211/spectmgmt.c

@@ -133,16 +133,20 @@ int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
 	}
 
 	if (wide_bw_chansw_ie) {
+		u8 new_seg1 = wide_bw_chansw_ie->new_center_freq_seg1;
 		struct ieee80211_vht_operation vht_oper = {
 			.chan_width =
 				wide_bw_chansw_ie->new_channel_width,
 			.center_freq_seg0_idx =
 				wide_bw_chansw_ie->new_center_freq_seg0,
-			.center_freq_seg1_idx =
-				wide_bw_chansw_ie->new_center_freq_seg1,
+			.center_freq_seg1_idx = new_seg1,
 			/* .basic_mcs_set doesn't matter */
 		};
-		struct ieee80211_ht_operation ht_oper = {};
+		struct ieee80211_ht_operation ht_oper = {
+			.operation_mode =
+				cpu_to_le16(new_seg1 <<
+					    IEEE80211_HT_OP_MODE_CCFS2_SHIFT),
+		};
 
 		/* default, for the case of IEEE80211_VHT_CHANWIDTH_USE_HT,
 		 * to the previously parsed chandef

net/wireless/wext-core.c

@@ -896,8 +896,9 @@ out:
 int call_commit_handler(struct net_device *dev)
 {
 #ifdef CONFIG_WIRELESS_EXT
-	if ((netif_running(dev)) &&
-	   (dev->wireless_handlers->standard[0] != NULL))
+	if (netif_running(dev) &&
+	    dev->wireless_handlers &&
+	    dev->wireless_handlers->standard[0])
 		/* Call the commit handler on the driver */
 		return dev->wireless_handlers->standard[0](dev, NULL,
 							   NULL, NULL);