A small set of fixes:

- avoid CSA warnings during link removal
    (by changing link bitmap after remove)
  - fix # of spatial streams initialisation
  - fix queues getting stuck in some CSA cases
    and resume failures
  - fix interface address when switching monitor mode
  - fix MBSS change flags 32-bit stack corruption
  - more UBSAN __counted_by "fixes" ...
  - fix link ID netlink validation
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Merge tag 'wireless-2024-12-10' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless

Johannes Berg says:

====================
A small set of fixes:
 - avoid CSA warnings during link removal
   (by changing link bitmap after remove)
 - fix # of spatial streams initialisation
 - fix queues getting stuck in some CSA cases
   and resume failures
 - fix interface address when switching monitor mode
 - fix MBSS change flags 32-bit stack corruption
 - more UBSAN __counted_by "fixes" ...
 - fix link ID netlink validation

* tag 'wireless-2024-12-10' of https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless:
  wifi: cfg80211: sme: init n_channels before channels[] access
  wifi: mac80211: fix station NSS capability initialization order
  wifi: mac80211: fix vif addr when switching from monitor to station
  wifi: mac80211: fix a queue stall in certain cases of CSA
  wifi: mac80211: wake the queues in case of failure in resume
  wifi: cfg80211: clear link ID from bitmap during link delete after clean up
  wifi: mac80211: init cnt before accessing elem in ieee80211_copy_mbssid_beacon
  wifi: mac80211: fix mbss changed flags corruption on 32 bit systems
  wifi: nl80211: fix NL80211_ATTR_MLO_LINK_ID off-by-one
====================

Link: https://patch.msgid.link/20241210130145.28618-3-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c

@@ -1972,7 +1972,7 @@ void iwl_mvm_channel_switch_error_notif(struct iwl_mvm *mvm,
 	if (csa_err_mask & (CS_ERR_COUNT_ERROR |
 			    CS_ERR_LONG_DELAY_AFTER_CS |
 			    CS_ERR_TX_BLOCK_TIMER_EXPIRED))
-		ieee80211_channel_switch_disconnect(vif, true);
+		ieee80211_channel_switch_disconnect(vif);
 	rcu_read_unlock();
 }
 

include/net/mac80211.h

@@ -1987,6 +1987,8 @@ enum ieee80211_neg_ttlm_res {
  * @neg_ttlm: negotiated TID to link mapping info.
  *	see &struct ieee80211_neg_ttlm.
  * @addr: address of this interface
+ * @addr_valid: indicates if the address is actively used. Set to false for
+ *	passive monitor interfaces, true in all other cases.
  * @p2p: indicates whether this AP or STA interface is a p2p
  *	interface, i.e. a GO or p2p-sta respectively
  * @netdev_features: tx netdev features supported by the hardware for this
@@ -2026,6 +2028,7 @@ struct ieee80211_vif {
 	u16 valid_links, active_links, dormant_links, suspended_links;
 	struct ieee80211_neg_ttlm neg_ttlm;
 	u8 addr[ETH_ALEN] __aligned(2);
+	bool addr_valid;
 	bool p2p;
 
 	u8 cab_queue;
@@ -6795,14 +6798,12 @@ void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success,
 /**
  * ieee80211_channel_switch_disconnect - disconnect due to channel switch error
  * @vif: &struct ieee80211_vif pointer from the add_interface callback.
- * @block_tx: if %true, do not send deauth frame.
  *
  * Instruct mac80211 to disconnect due to a channel switch error. The channel
  * switch can request to block the tx and so, we need to make sure we do not send
  * a deauth frame in this case.
  */
-void ieee80211_channel_switch_disconnect(struct ieee80211_vif *vif,
-					 bool block_tx);
+void ieee80211_channel_switch_disconnect(struct ieee80211_vif *vif);
 
 /**
  * ieee80211_request_smps - request SM PS transition

net/mac80211/cfg.c

@@ -1088,13 +1088,13 @@ ieee80211_copy_mbssid_beacon(u8 *pos, struct cfg80211_mbssid_elems *dst,
 {
 	int i, offset = 0;
 
+	dst->cnt = src->cnt;
 	for (i = 0; i < src->cnt; i++) {
 		memcpy(pos + offset, src->elem[i].data, src->elem[i].len);
 		dst->elem[i].len = src->elem[i].len;
 		dst->elem[i].data = pos + offset;
 		offset += dst->elem[i].len;
 	}
-	dst->cnt = src->cnt;
 
 	return offset;
 }
@@ -1935,6 +1935,8 @@ static int sta_link_apply_parameters(struct ieee80211_local *local,
 						    params->eht_capa_len,
 						    link_sta);
 
+	ieee80211_sta_init_nss(link_sta);
+
 	if (params->opmode_notif_used) {
 		/* returned value is only needed for rc update, but the
 		 * rc isn't initialized here yet, so ignore it
@@ -1944,8 +1946,6 @@ static int sta_link_apply_parameters(struct ieee80211_local *local,
 					      sband->band);
 	}
 
-	ieee80211_sta_init_nss(link_sta);
-
 	return 0;
 }
 
@@ -3726,13 +3726,12 @@ void ieee80211_csa_finish(struct ieee80211_vif *vif, unsigned int link_id)
 }
 EXPORT_SYMBOL(ieee80211_csa_finish);
 
-void ieee80211_channel_switch_disconnect(struct ieee80211_vif *vif, bool block_tx)
+void ieee80211_channel_switch_disconnect(struct ieee80211_vif *vif)
 {
 	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
 	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 	struct ieee80211_local *local = sdata->local;
 
-	sdata->csa_blocked_queues = block_tx;
 	sdata_info(sdata, "channel switch failed, disconnecting\n");
 	wiphy_work_queue(local->hw.wiphy, &ifmgd->csa_connection_drop_work);
 }
@@ -5046,10 +5045,16 @@ static void ieee80211_del_intf_link(struct wiphy *wiphy,
 				    unsigned int link_id)
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
+	u16 new_links = wdev->valid_links & ~BIT(link_id);
 
 	lockdep_assert_wiphy(sdata->local->hw.wiphy);
 
-	ieee80211_vif_set_links(sdata, wdev->valid_links, 0);
+	/* During the link teardown process, certain functions require the
+	 * link_id to remain in the valid_links bitmap. Therefore, instead
+	 * of removing the link_id from the bitmap, pass a masked value to
+	 * simulate as if link_id does not exist anymore.
+	 */
+	ieee80211_vif_set_links(sdata, new_links, 0);
 }
 
 static int

net/mac80211/ieee80211_i.h

@@ -1104,8 +1104,6 @@ struct ieee80211_sub_if_data {
 
 	unsigned long state;
 
-	bool csa_blocked_queues;
-
 	char name[IFNAMSIZ];
 
 	struct ieee80211_fragment_cache frags;
@@ -2412,17 +2410,13 @@ void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
 				   struct ieee80211_sub_if_data *sdata);
 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
 			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
-
+unsigned int
+ieee80211_get_vif_queues(struct ieee80211_local *local,
+			 struct ieee80211_sub_if_data *sdata);
 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
 				     unsigned long queues,
 				     enum queue_stop_reason reason,
 				     bool refcounted);
-void ieee80211_stop_vif_queues(struct ieee80211_local *local,
-			       struct ieee80211_sub_if_data *sdata,
-			       enum queue_stop_reason reason);
-void ieee80211_wake_vif_queues(struct ieee80211_local *local,
-			       struct ieee80211_sub_if_data *sdata,
-			       enum queue_stop_reason reason);
 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
 				     unsigned long queues,
 				     enum queue_stop_reason reason,
@@ -2433,6 +2427,43 @@ void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
 				    enum queue_stop_reason reason,
 				    bool refcounted);
+static inline void
+ieee80211_stop_vif_queues(struct ieee80211_local *local,
+			  struct ieee80211_sub_if_data *sdata,
+			  enum queue_stop_reason reason)
+{
+	ieee80211_stop_queues_by_reason(&local->hw,
+					ieee80211_get_vif_queues(local, sdata),
+					reason, true);
+}
+
+static inline void
+ieee80211_wake_vif_queues(struct ieee80211_local *local,
+			  struct ieee80211_sub_if_data *sdata,
+			  enum queue_stop_reason reason)
+{
+	ieee80211_wake_queues_by_reason(&local->hw,
+					ieee80211_get_vif_queues(local, sdata),
+					reason, true);
+}
+static inline void
+ieee80211_stop_vif_queues_norefcount(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata,
+				     enum queue_stop_reason reason)
+{
+	ieee80211_stop_queues_by_reason(&local->hw,
+					ieee80211_get_vif_queues(local, sdata),
+					reason, false);
+}
+static inline void
+ieee80211_wake_vif_queues_norefcount(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata,
+				     enum queue_stop_reason reason)
+{
+	ieee80211_wake_queues_by_reason(&local->hw,
+					ieee80211_get_vif_queues(local, sdata),
+					reason, false);
+}
 void ieee80211_add_pending_skb(struct ieee80211_local *local,
 			       struct sk_buff *skb);
 void ieee80211_add_pending_skbs(struct ieee80211_local *local,

net/mac80211/iface.c

@@ -278,13 +278,8 @@ static int _ieee80211_change_mac(struct ieee80211_sub_if_data *sdata,
 	ret = eth_mac_addr(sdata->dev, sa);
 
 	if (ret == 0) {
-		if (check_dup) {
-			memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
-			ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
-		} else {
-			memset(sdata->vif.addr, 0, ETH_ALEN);
-			memset(sdata->vif.bss_conf.addr, 0, ETH_ALEN);
-		}
+		memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
+		ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
 	}
 
 	/* Regardless of eth_mac_addr() return we still want to add the
@@ -1323,6 +1318,8 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
 		}
 	}
 
+	sdata->vif.addr_valid = sdata->vif.type != NL80211_IFTYPE_MONITOR ||
+				(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE);
 	switch (sdata->vif.type) {
 	case NL80211_IFTYPE_AP_VLAN:
 		/* no need to tell driver, but set carrier and chanctx */
@@ -2374,18 +2371,14 @@ void ieee80211_vif_block_queues_csa(struct ieee80211_sub_if_data *sdata)
 	if (ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA))
 		return;
 
-	ieee80211_stop_vif_queues(local, sdata,
-				  IEEE80211_QUEUE_STOP_REASON_CSA);
-	sdata->csa_blocked_queues = true;
+	ieee80211_stop_vif_queues_norefcount(local, sdata,
+					     IEEE80211_QUEUE_STOP_REASON_CSA);
 }
 
 void ieee80211_vif_unblock_queues_csa(struct ieee80211_sub_if_data *sdata)
 {
 	struct ieee80211_local *local = sdata->local;
 
-	if (sdata->csa_blocked_queues) {
-		ieee80211_wake_vif_queues(local, sdata,
-					  IEEE80211_QUEUE_STOP_REASON_CSA);
-		sdata->csa_blocked_queues = false;
-	}
+	ieee80211_wake_vif_queues_norefcount(local, sdata,
+					     IEEE80211_QUEUE_STOP_REASON_CSA);
 }

net/mac80211/mesh.c

@@ -1157,14 +1157,14 @@ void ieee80211_mbss_info_change_notify(struct ieee80211_sub_if_data *sdata,
 				       u64 changed)
 {
 	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
-	unsigned long bits = changed;
+	unsigned long bits[] = { BITMAP_FROM_U64(changed) };
 	u32 bit;
 
-	if (!bits)
+	if (!changed)
 		return;
 
 	/* if we race with running work, worst case this work becomes a noop */
-	for_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE)
+	for_each_set_bit(bit, bits, sizeof(changed) * BITS_PER_BYTE)
 		set_bit(bit, ifmsh->mbss_changed);
 	set_bit(MESH_WORK_MBSS_CHANGED, &ifmsh->wrkq_flags);
 	wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work);

net/mac80211/mlme.c

@@ -2638,8 +2638,6 @@ ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link,
 	 */
 	link->conf->csa_active = true;
 	link->u.mgd.csa.blocked_tx = csa_ie.mode;
-	sdata->csa_blocked_queues =
-		csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA);
 
 	wiphy_work_queue(sdata->local->hw.wiphy,
 			 &ifmgd->csa_connection_drop_work);

net/mac80211/util.c

@@ -657,7 +657,7 @@ void ieee80211_wake_queues(struct ieee80211_hw *hw)
 }
 EXPORT_SYMBOL(ieee80211_wake_queues);
 
-static unsigned int
+unsigned int
 ieee80211_get_vif_queues(struct ieee80211_local *local,
 			 struct ieee80211_sub_if_data *sdata)
 {
@@ -669,7 +669,8 @@ ieee80211_get_vif_queues(struct ieee80211_local *local,
 		queues = 0;
 
 		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
-			queues |= BIT(sdata->vif.hw_queue[ac]);
+			if (sdata->vif.hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
+				queues |= BIT(sdata->vif.hw_queue[ac]);
 		if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
 			queues |= BIT(sdata->vif.cab_queue);
 	} else {
@@ -724,24 +725,6 @@ void ieee80211_flush_queues(struct ieee80211_local *local,
 	__ieee80211_flush_queues(local, sdata, 0, drop);
 }
 
-void ieee80211_stop_vif_queues(struct ieee80211_local *local,
-			       struct ieee80211_sub_if_data *sdata,
-			       enum queue_stop_reason reason)
-{
-	ieee80211_stop_queues_by_reason(&local->hw,
-					ieee80211_get_vif_queues(local, sdata),
-					reason, true);
-}
-
-void ieee80211_wake_vif_queues(struct ieee80211_local *local,
-			       struct ieee80211_sub_if_data *sdata,
-			       enum queue_stop_reason reason)
-{
-	ieee80211_wake_queues_by_reason(&local->hw,
-					ieee80211_get_vif_queues(local, sdata),
-					reason, true);
-}
-
 static void __iterate_interfaces(struct ieee80211_local *local,
 				 u32 iter_flags,
 				 void (*iterator)(void *data, u8 *mac,
@@ -1843,6 +1826,9 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 			WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
 		else
 			WARN(1, "Hardware became unavailable during restart.\n");
+		ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
+						IEEE80211_QUEUE_STOP_REASON_SUSPEND,
+						false);
 		ieee80211_handle_reconfig_failure(local);
 		return res;
 	}

net/wireless/nl80211.c

@@ -814,7 +814,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
 	[NL80211_ATTR_MLO_LINKS] =
 		NLA_POLICY_NESTED_ARRAY(nl80211_policy),
 	[NL80211_ATTR_MLO_LINK_ID] =
-		NLA_POLICY_RANGE(NLA_U8, 0, IEEE80211_MLD_MAX_NUM_LINKS),
+		NLA_POLICY_RANGE(NLA_U8, 0, IEEE80211_MLD_MAX_NUM_LINKS - 1),
 	[NL80211_ATTR_MLD_ADDR] = NLA_POLICY_EXACT_LEN(ETH_ALEN),
 	[NL80211_ATTR_MLO_SUPPORT] = { .type = NLA_FLAG },
 	[NL80211_ATTR_MAX_NUM_AKM_SUITES] = { .type = NLA_REJECT },

net/wireless/sme.c

@@ -83,6 +83,7 @@ static int cfg80211_conn_scan(struct wireless_dev *wdev)
 	if (!request)
 		return -ENOMEM;
 
+	request->n_channels = n_channels;
 	if (wdev->conn->params.channel) {
 		enum nl80211_band band = wdev->conn->params.channel->band;
 		struct ieee80211_supported_band *sband =

net/wireless/util.c

@@ -2843,10 +2843,9 @@ void cfg80211_remove_link(struct wireless_dev *wdev, unsigned int link_id)
 		break;
 	}
 
-	wdev->valid_links &= ~BIT(link_id);
-
 	rdev_del_intf_link(rdev, wdev, link_id);
 
+	wdev->valid_links &= ~BIT(link_id);
 	eth_zero_addr(wdev->links[link_id].addr);
 }