Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 1477 insertions, 0 deletions

diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
new file mode 100644
index 000000000..a0d1cde26
--- /dev/null
+++ b/net/wireless/mlme.c
@@ -0,0 +1,1477 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * cfg80211 MLME SAP interface
+ *
+ * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2015		Intel Deutschland GmbH
+ * Copyright (C) 2019-2020, 2022-2026 Intel Corporation
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/etherdevice.h>
+#include <linux/netdevice.h>
+#include <linux/nl80211.h>
+#include <linux/slab.h>
+#include <linux/wireless.h>
+#include <net/cfg80211.h>
+#include <net/iw_handler.h>
+#include "core.h"
+#include "nl80211.h"
+#include "rdev-ops.h"
+
+
+void cfg80211_rx_assoc_resp(struct net_device *dev,
+			    const struct cfg80211_rx_assoc_resp_data *data)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)data->buf;
+	struct cfg80211_connect_resp_params cr = {
+		.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED,
+		.req_ie = data->req_ies,
+		.req_ie_len = data->req_ies_len,
+		.ap_mld_addr = data->ap_mld_addr,
+		.assoc_encrypted = data->assoc_encrypted,
+	};
+	unsigned int link_id;
+	bool is_s1g = false;
+
+	for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) {
+		cr.links[link_id].status = data->links[link_id].status;
+		cr.links[link_id].bss = data->links[link_id].bss;
+
+		WARN_ON_ONCE(cr.links[link_id].status != WLAN_STATUS_SUCCESS &&
+			     (!cr.ap_mld_addr || !cr.links[link_id].bss));
+
+		if (!cr.links[link_id].bss)
+			continue;
+		cr.links[link_id].bssid = data->links[link_id].bss->bssid;
+		cr.links[link_id].addr = data->links[link_id].addr;
+		/* need to have local link addresses for MLO connections */
+		WARN_ON(cr.ap_mld_addr &&
+			!is_valid_ether_addr(cr.links[link_id].addr));
+
+		BUG_ON(!cr.links[link_id].bss->channel);
+
+		if (cr.links[link_id].bss->channel->band == NL80211_BAND_S1GHZ) {
+			WARN_ON(link_id);
+			is_s1g = true;
+		}
+
+		if (cr.ap_mld_addr)
+			cr.valid_links |= BIT(link_id);
+	}
+
+	if (is_s1g) {
+		if (data->len < offsetof(struct ieee80211_mgmt,
+					 u.s1g_assoc_resp.variable))
+			goto free_bss;
+		cr.resp_ie = (u8 *)&mgmt->u.s1g_assoc_resp.variable;
+		cr.resp_ie_len = data->len -
+				 offsetof(struct ieee80211_mgmt,
+					  u.s1g_assoc_resp.variable);
+	} else {
+		if (data->len < offsetof(struct ieee80211_mgmt,
+					 u.assoc_resp.variable))
+			goto free_bss;
+		cr.resp_ie = mgmt->u.assoc_resp.variable;
+		cr.resp_ie_len = data->len -
+				 offsetof(struct ieee80211_mgmt,
+					  u.assoc_resp.variable);
+	}
+	cr.status = le16_to_cpu(mgmt->u.assoc_resp.status_code);
+
+	trace_cfg80211_send_rx_assoc(dev, data);
+
+	/*
+	 * This is a bit of a hack, we don't notify userspace of
+	 * a (re-)association reply if we tried to send a reassoc
+	 * and got a reject -- we only try again with an assoc
+	 * frame instead of reassoc.
+	 */
+	if (cfg80211_sme_rx_assoc_resp(wdev, cr.status))
+		goto free_bss;
+
+	nl80211_send_rx_assoc(rdev, dev, data);
+	/* update current_bss etc., consumes the bss reference */
+	__cfg80211_connect_result(dev, &cr, cr.status == WLAN_STATUS_SUCCESS);
+	return;
+
+free_bss:
+	for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) {
+		struct cfg80211_bss *bss = data->links[link_id].bss;
+
+		if (!bss)
+			continue;
+
+		cfg80211_unhold_bss(bss_from_pub(bss));
+		cfg80211_put_bss(wiphy, bss);
+	}
+}
+EXPORT_SYMBOL(cfg80211_rx_assoc_resp);
+
+static void cfg80211_process_auth(struct wireless_dev *wdev,
+				  const u8 *buf, size_t len)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+
+	nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
+	cfg80211_sme_rx_auth(wdev, buf, len);
+}
+
+static void cfg80211_process_deauth(struct wireless_dev *wdev,
+				    const u8 *buf, size_t len,
+				    bool reconnect)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
+	const u8 *bssid = mgmt->bssid;
+	u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
+	bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
+
+	nl80211_send_deauth(rdev, wdev->netdev, buf, len, reconnect, GFP_KERNEL);
+
+	if (!wdev->connected || !ether_addr_equal(wdev->u.client.connected_addr, bssid))
+		return;
+
+	__cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
+	cfg80211_sme_deauth(wdev);
+}
+
+static void cfg80211_process_disassoc(struct wireless_dev *wdev,
+				      const u8 *buf, size_t len,
+				      bool reconnect)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
+	const u8 *bssid = mgmt->bssid;
+	u16 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
+	bool from_ap = !ether_addr_equal(mgmt->sa, wdev->netdev->dev_addr);
+
+	nl80211_send_disassoc(rdev, wdev->netdev, buf, len, reconnect,
+			      GFP_KERNEL);
+
+	if (WARN_ON(!wdev->connected ||
+		    !ether_addr_equal(wdev->u.client.connected_addr, bssid)))
+		return;
+
+	__cfg80211_disconnected(wdev->netdev, NULL, 0, reason_code, from_ap);
+	cfg80211_sme_disassoc(wdev);
+}
+
+void cfg80211_rx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct ieee80211_mgmt *mgmt = (void *)buf;
+	__le16 fc;
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	if (len < sizeof(fc))
+		return;
+
+	fc = mgmt->frame_control;
+
+	if (ieee80211_is_auth(fc)) {
+		if (len < offsetofend(struct ieee80211_mgmt, u.auth.status_code))
+			return;
+	} else if (ieee80211_is_deauth(fc)) {
+		if (len < offsetofend(struct ieee80211_mgmt, u.deauth.reason_code))
+			return;
+	} else if (ieee80211_is_disassoc(fc)) {
+		if (len < offsetofend(struct ieee80211_mgmt, u.disassoc.reason_code))
+			return;
+	} else {
+		return;
+	}
+
+	trace_cfg80211_rx_mlme_mgmt(dev, buf, len);
+
+	if (ieee80211_is_auth(fc))
+		cfg80211_process_auth(wdev, buf, len);
+	else if (ieee80211_is_deauth(fc))
+		cfg80211_process_deauth(wdev, buf, len, false);
+	else
+		cfg80211_process_disassoc(wdev, buf, len, false);
+}
+EXPORT_SYMBOL(cfg80211_rx_mlme_mgmt);
+
+void cfg80211_auth_timeout(struct net_device *dev, const u8 *addr)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	trace_cfg80211_send_auth_timeout(dev, addr);
+
+	nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
+	cfg80211_sme_auth_timeout(wdev);
+}
+EXPORT_SYMBOL(cfg80211_auth_timeout);
+
+void cfg80211_assoc_failure(struct net_device *dev,
+			    struct cfg80211_assoc_failure *data)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	const u8 *addr = data->ap_mld_addr ?: data->bss[0]->bssid;
+	int i;
+
+	trace_cfg80211_send_assoc_failure(dev, data);
+
+	if (data->timeout) {
+		nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
+		cfg80211_sme_assoc_timeout(wdev);
+	} else {
+		cfg80211_sme_abandon_assoc(wdev);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(data->bss); i++) {
+		struct cfg80211_bss *bss = data->bss[i];
+
+		if (!bss)
+			continue;
+
+		cfg80211_unhold_bss(bss_from_pub(bss));
+		cfg80211_put_bss(wiphy, bss);
+	}
+}
+EXPORT_SYMBOL(cfg80211_assoc_failure);
+
+void cfg80211_tx_mlme_mgmt(struct net_device *dev, const u8 *buf, size_t len,
+			   bool reconnect)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct ieee80211_mgmt *mgmt = (void *)buf;
+	__le16 fc;
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	if (len < sizeof(fc))
+		return;
+
+	fc = mgmt->frame_control;
+
+	if (ieee80211_is_deauth(fc)) {
+		if (len < offsetofend(struct ieee80211_mgmt, u.deauth.reason_code))
+			return;
+	} else if (ieee80211_is_disassoc(fc)) {
+		if (len < offsetofend(struct ieee80211_mgmt, u.disassoc.reason_code))
+			return;
+	} else {
+		return;
+	}
+
+	trace_cfg80211_tx_mlme_mgmt(dev, buf, len, reconnect);
+
+	if (ieee80211_is_deauth(fc))
+		cfg80211_process_deauth(wdev, buf, len, reconnect);
+	else
+		cfg80211_process_disassoc(wdev, buf, len, reconnect);
+}
+EXPORT_SYMBOL(cfg80211_tx_mlme_mgmt);
+
+void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
+				  enum nl80211_key_type key_type, int key_id,
+				  const u8 *tsc, gfp_t gfp)
+{
+	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+#ifdef CONFIG_CFG80211_WEXT
+	union iwreq_data wrqu;
+	char *buf = kmalloc(128, gfp);
+
+	if (buf) {
+		memset(&wrqu, 0, sizeof(wrqu));
+		wrqu.data.length =
+			sprintf(buf, "MLME-MICHAELMICFAILURE."
+				"indication(keyid=%d %scast addr=%pM)",
+				key_id, key_type == NL80211_KEYTYPE_GROUP
+				? "broad" : "uni", addr);
+		wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
+		kfree(buf);
+	}
+#endif
+
+	trace_cfg80211_michael_mic_failure(dev, addr, key_type, key_id, tsc);
+	nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
+}
+EXPORT_SYMBOL(cfg80211_michael_mic_failure);
+
+/* some MLME handling for userspace SME */
+int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
+		       struct net_device *dev,
+		       struct cfg80211_auth_request *req)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	if (!req->bss)
+		return -ENOENT;
+
+	if (req->link_id >= 0 &&
+	    !(wdev->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO))
+		return -EINVAL;
+
+	if (req->auth_type == NL80211_AUTHTYPE_SHARED_KEY) {
+		if (!req->key || !req->key_len ||
+		    req->key_idx < 0 || req->key_idx > 3)
+			return -EINVAL;
+	}
+
+	if (wdev->connected &&
+	    ether_addr_equal(req->bss->bssid, wdev->u.client.connected_addr))
+		return -EALREADY;
+
+	if (ether_addr_equal(req->bss->bssid, dev->dev_addr) ||
+	    (req->link_id >= 0 &&
+	     ether_addr_equal(req->ap_mld_addr, dev->dev_addr)))
+		return -EINVAL;
+
+	return rdev_auth(rdev, dev, req);
+}
+
+/*  Do a logical ht_capa &= ht_capa_mask.  */
+void cfg80211_oper_and_ht_capa(struct ieee80211_ht_cap *ht_capa,
+			       const struct ieee80211_ht_cap *ht_capa_mask)
+{
+	int i;
+	u8 *p1, *p2;
+	if (!ht_capa_mask) {
+		memset(ht_capa, 0, sizeof(*ht_capa));
+		return;
+	}
+
+	p1 = (u8*)(ht_capa);
+	p2 = (u8*)(ht_capa_mask);
+	for (i = 0; i < sizeof(*ht_capa); i++)
+		p1[i] &= p2[i];
+}
+
+/*  Do a logical vht_capa &= vht_capa_mask.  */
+void cfg80211_oper_and_vht_capa(struct ieee80211_vht_cap *vht_capa,
+				const struct ieee80211_vht_cap *vht_capa_mask)
+{
+	int i;
+	u8 *p1, *p2;
+	if (!vht_capa_mask) {
+		memset(vht_capa, 0, sizeof(*vht_capa));
+		return;
+	}
+
+	p1 = (u8*)(vht_capa);
+	p2 = (u8*)(vht_capa_mask);
+	for (i = 0; i < sizeof(*vht_capa); i++)
+		p1[i] &= p2[i];
+}
+
+static int
+cfg80211_mlme_check_mlo_compat(const struct ieee80211_multi_link_elem *mle_a,
+			       const struct ieee80211_multi_link_elem *mle_b,
+			       struct netlink_ext_ack *extack)
+{
+	const struct ieee80211_mle_basic_common_info *common_a, *common_b;
+
+	common_a = (const void *)mle_a->variable;
+	common_b = (const void *)mle_b->variable;
+
+	if (memcmp(common_a->mld_mac_addr, common_b->mld_mac_addr, ETH_ALEN)) {
+		NL_SET_ERR_MSG(extack, "AP MLD address mismatch");
+		return -EINVAL;
+	}
+
+	if (ieee80211_mle_get_eml_cap((const u8 *)mle_a) !=
+	    ieee80211_mle_get_eml_cap((const u8 *)mle_b)) {
+		NL_SET_ERR_MSG(extack, "link EML capabilities mismatch");
+		return -EINVAL;
+	}
+
+	if (ieee80211_mle_get_mld_capa_op((const u8 *)mle_a) !=
+	    ieee80211_mle_get_mld_capa_op((const u8 *)mle_b)) {
+		NL_SET_ERR_MSG(extack, "link MLD capabilities/ops mismatch");
+		return -EINVAL;
+	}
+
+	/*
+	 * Only verify the values in Extended MLD Capabilities that are
+	 * not reserved when transmitted by an AP (and expected to remain the
+	 * same over time).
+	 * The Recommended Max Simultaneous Links subfield in particular is
+	 * reserved when included in a unicast Probe Response frame and may
+	 * also change when the AP adds/removes links. The BTM MLD
+	 * Recommendation For Multiple APs Support subfield is reserved when
+	 * transmitted by an AP.
+	 */
+	if ((ieee80211_mle_get_ext_mld_capa_op((const u8 *)mle_a) &
+	     (IEEE80211_EHT_ML_EXT_MLD_CAPA_OP_PARAM_UPDATE |
+	      IEEE80211_EHT_ML_EXT_MLD_CAPA_NSTR_UPDATE |
+	      IEEE80211_EHT_ML_EXT_MLD_CAPA_EMLSR_ENA_ON_ONE_LINK |
+	      IEEE80211_UHR_ML_EXT_MLD_CAPA_ML_PM)) !=
+	    (ieee80211_mle_get_ext_mld_capa_op((const u8 *)mle_b) &
+	     (IEEE80211_EHT_ML_EXT_MLD_CAPA_OP_PARAM_UPDATE |
+	      IEEE80211_EHT_ML_EXT_MLD_CAPA_NSTR_UPDATE |
+	      IEEE80211_EHT_ML_EXT_MLD_CAPA_EMLSR_ENA_ON_ONE_LINK |
+	      IEEE80211_UHR_ML_EXT_MLD_CAPA_ML_PM))) {
+		NL_SET_ERR_MSG(extack,
+			       "extended link MLD capabilities/ops mismatch");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int cfg80211_mlme_check_mlo(struct net_device *dev,
+				   struct cfg80211_assoc_request *req,
+				   struct netlink_ext_ack *extack)
+{
+	const struct ieee80211_multi_link_elem *mles[ARRAY_SIZE(req->links)] = {};
+	int i;
+
+	if (req->link_id < 0)
+		return 0;
+
+	if (!req->links[req->link_id].bss) {
+		NL_SET_ERR_MSG(extack, "no BSS for assoc link");
+		return -EINVAL;
+	}
+
+	rcu_read_lock();
+	for (i = 0; i < ARRAY_SIZE(req->links); i++) {
+		const struct cfg80211_bss_ies *ies;
+		const struct element *ml;
+
+		if (!req->links[i].bss)
+			continue;
+
+		if (ether_addr_equal(req->links[i].bss->bssid, dev->dev_addr)) {
+			NL_SET_ERR_MSG(extack, "BSSID must not be our address");
+			req->links[i].error = -EINVAL;
+			goto error;
+		}
+
+		ies = rcu_dereference(req->links[i].bss->ies);
+		ml = cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK,
+					    ies->data, ies->len);
+		if (!ml) {
+			NL_SET_ERR_MSG(extack, "MLO BSS w/o ML element");
+			req->links[i].error = -EINVAL;
+			goto error;
+		}
+
+		if (!ieee80211_mle_type_ok(ml->data + 1,
+					   IEEE80211_ML_CONTROL_TYPE_BASIC,
+					   ml->datalen - 1)) {
+			NL_SET_ERR_MSG(extack, "BSS with invalid ML element");
+			req->links[i].error = -EINVAL;
+			goto error;
+		}
+
+		mles[i] = (const void *)(ml->data + 1);
+
+		if (ieee80211_mle_get_link_id((const u8 *)mles[i]) != i) {
+			NL_SET_ERR_MSG(extack, "link ID mismatch");
+			req->links[i].error = -EINVAL;
+			goto error;
+		}
+	}
+
+	if (WARN_ON(!mles[req->link_id]))
+		goto error;
+
+	for (i = 0; i < ARRAY_SIZE(req->links); i++) {
+		if (i == req->link_id || !req->links[i].bss)
+			continue;
+
+		if (WARN_ON(!mles[i]))
+			goto error;
+
+		if (cfg80211_mlme_check_mlo_compat(mles[req->link_id], mles[i],
+						   extack)) {
+			req->links[i].error = -EINVAL;
+			goto error;
+		}
+	}
+
+	rcu_read_unlock();
+	return 0;
+error:
+	rcu_read_unlock();
+	return -EINVAL;
+}
+
+/* Note: caller must cfg80211_put_bss() regardless of result */
+int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
+			struct net_device *dev,
+			struct cfg80211_assoc_request *req,
+			struct netlink_ext_ack *extack)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	int err;
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	err = cfg80211_mlme_check_mlo(dev, req, extack);
+	if (err)
+		return err;
+
+	if (wdev->connected &&
+	    (!req->prev_bssid ||
+	     !ether_addr_equal(wdev->u.client.connected_addr, req->prev_bssid)))
+		return -EALREADY;
+
+	if ((req->bss && ether_addr_equal(req->bss->bssid, dev->dev_addr)) ||
+	    (req->link_id >= 0 &&
+	     ether_addr_equal(req->ap_mld_addr, dev->dev_addr)))
+		return -EINVAL;
+
+	cfg80211_oper_and_ht_capa(&req->ht_capa_mask,
+				  rdev->wiphy.ht_capa_mod_mask);
+	cfg80211_oper_and_vht_capa(&req->vht_capa_mask,
+				   rdev->wiphy.vht_capa_mod_mask);
+
+	err = rdev_assoc(rdev, dev, req);
+	if (!err) {
+		int link_id;
+
+		if (req->bss) {
+			cfg80211_ref_bss(&rdev->wiphy, req->bss);
+			cfg80211_hold_bss(bss_from_pub(req->bss));
+		}
+
+		for (link_id = 0; link_id < ARRAY_SIZE(req->links); link_id++) {
+			if (!req->links[link_id].bss)
+				continue;
+			cfg80211_ref_bss(&rdev->wiphy, req->links[link_id].bss);
+			cfg80211_hold_bss(bss_from_pub(req->links[link_id].bss));
+		}
+	}
+	return err;
+}
+
+int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
+			 struct net_device *dev, const u8 *bssid,
+			 const u8 *ie, int ie_len, u16 reason,
+			 bool local_state_change)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct cfg80211_deauth_request req = {
+		.bssid = bssid,
+		.reason_code = reason,
+		.ie = ie,
+		.ie_len = ie_len,
+		.local_state_change = local_state_change,
+	};
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	if (local_state_change &&
+	    (!wdev->connected ||
+	     !ether_addr_equal(wdev->u.client.connected_addr, bssid)))
+		return 0;
+
+	if (ether_addr_equal(wdev->disconnect_bssid, bssid) ||
+	    (wdev->connected &&
+	     ether_addr_equal(wdev->u.client.connected_addr, bssid)))
+		wdev->conn_owner_nlportid = 0;
+
+	return rdev_deauth(rdev, dev, &req);
+}
+
+int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
+			   struct net_device *dev, const u8 *ap_addr,
+			   const u8 *ie, int ie_len, u16 reason,
+			   bool local_state_change)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct cfg80211_disassoc_request req = {
+		.reason_code = reason,
+		.local_state_change = local_state_change,
+		.ie = ie,
+		.ie_len = ie_len,
+		.ap_addr = ap_addr,
+	};
+	int err;
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	if (!wdev->connected)
+		return -ENOTCONN;
+
+	if (memcmp(wdev->u.client.connected_addr, ap_addr, ETH_ALEN))
+		return -ENOTCONN;
+
+	err = rdev_disassoc(rdev, dev, &req);
+	if (err)
+		return err;
+
+	/* driver should have reported the disassoc */
+	WARN_ON(wdev->connected);
+	return 0;
+}
+
+void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
+			struct net_device *dev)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	u8 bssid[ETH_ALEN];
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	if (!rdev->ops->deauth)
+		return;
+
+	if (!wdev->connected)
+		return;
+
+	memcpy(bssid, wdev->u.client.connected_addr, ETH_ALEN);
+	cfg80211_mlme_deauth(rdev, dev, bssid, NULL, 0,
+			     WLAN_REASON_DEAUTH_LEAVING, false);
+}
+
+struct cfg80211_mgmt_registration {
+	struct list_head list;
+	struct wireless_dev *wdev;
+
+	u32 nlportid;
+
+	int match_len;
+
+	__le16 frame_type;
+
+	bool multicast_rx;
+
+	u8 match[];
+};
+
+static void cfg80211_mgmt_registrations_update(struct wireless_dev *wdev)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+	struct wireless_dev *tmp;
+	struct cfg80211_mgmt_registration *reg;
+	struct mgmt_frame_regs upd = {};
+
+	lockdep_assert_held(&rdev->wiphy.mtx);
+
+	spin_lock_bh(&rdev->mgmt_registrations_lock);
+	if (!wdev->mgmt_registrations_need_update) {
+		spin_unlock_bh(&rdev->mgmt_registrations_lock);
+		return;
+	}
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(tmp, &rdev->wiphy.wdev_list, list) {
+		list_for_each_entry(reg, &tmp->mgmt_registrations, list) {
+			u32 mask = BIT(le16_to_cpu(reg->frame_type) >> 4);
+			u32 mcast_mask = 0;
+
+			if (reg->multicast_rx)
+				mcast_mask = mask;
+
+			upd.global_stypes |= mask;
+			upd.global_mcast_stypes |= mcast_mask;
+
+			if (tmp == wdev) {
+				upd.interface_stypes |= mask;
+				upd.interface_mcast_stypes |= mcast_mask;
+			}
+		}
+	}
+	rcu_read_unlock();
+
+	wdev->mgmt_registrations_need_update = 0;
+	spin_unlock_bh(&rdev->mgmt_registrations_lock);
+
+	rdev_update_mgmt_frame_registrations(rdev, wdev, &upd);
+}
+
+void cfg80211_mgmt_registrations_update_wk(struct work_struct *wk)
+{
+	struct cfg80211_registered_device *rdev;
+	struct wireless_dev *wdev;
+
+	rdev = container_of(wk, struct cfg80211_registered_device,
+			    mgmt_registrations_update_wk);
+
+	guard(wiphy)(&rdev->wiphy);
+
+	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
+		cfg80211_mgmt_registrations_update(wdev);
+}
+
+int cfg80211_mlme_register_mgmt(struct wireless_dev *wdev, u32 snd_portid,
+				u16 frame_type, const u8 *match_data,
+				int match_len, bool multicast_rx,
+				struct netlink_ext_ack *extack)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+	struct cfg80211_mgmt_registration *reg, *nreg;
+	int err = 0;
+	u16 mgmt_type;
+	bool update_multicast = false;
+
+	if (!wdev->wiphy->mgmt_stypes)
+		return -EOPNOTSUPP;
+
+	if ((frame_type & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT) {
+		NL_SET_ERR_MSG(extack, "frame type not management");
+		return -EINVAL;
+	}
+
+	if (frame_type & ~(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) {
+		NL_SET_ERR_MSG(extack, "Invalid frame type");
+		return -EINVAL;
+	}
+
+	mgmt_type = (frame_type & IEEE80211_FCTL_STYPE) >> 4;
+	if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].rx & BIT(mgmt_type))) {
+		NL_SET_ERR_MSG(extack,
+			       "Registration to specific type not supported");
+		return -EINVAL;
+	}
+
+	/*
+	 * To support Pre Association Security Negotiation (PASN), registration
+	 * for authentication frames should be supported. However, as some
+	 * versions of the user space daemons wrongly register to all types of
+	 * authentication frames (which might result in unexpected behavior)
+	 * allow such registration if the request is for a specific
+	 * authentication algorithm number.
+	 */
+	if (wdev->iftype == NL80211_IFTYPE_STATION &&
+	    (frame_type & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_AUTH &&
+	    !(match_data && match_len >= 2)) {
+		NL_SET_ERR_MSG(extack,
+			       "Authentication algorithm number required");
+		return -EINVAL;
+	}
+
+	nreg = kzalloc(sizeof(*reg) + match_len, GFP_KERNEL);
+	if (!nreg)
+		return -ENOMEM;
+
+	spin_lock_bh(&rdev->mgmt_registrations_lock);
+
+	list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
+		int mlen = min(match_len, reg->match_len);
+
+		if (frame_type != le16_to_cpu(reg->frame_type))
+			continue;
+
+		if (memcmp(reg->match, match_data, mlen) == 0) {
+			if (reg->multicast_rx != multicast_rx) {
+				update_multicast = true;
+				reg->multicast_rx = multicast_rx;
+				break;
+			}
+			NL_SET_ERR_MSG(extack, "Match already configured");
+			err = -EALREADY;
+			break;
+		}
+	}
+
+	if (err)
+		goto out;
+
+	if (update_multicast) {
+		kfree(nreg);
+	} else {
+		memcpy(nreg->match, match_data, match_len);
+		nreg->match_len = match_len;
+		nreg->nlportid = snd_portid;
+		nreg->frame_type = cpu_to_le16(frame_type);
+		nreg->wdev = wdev;
+		nreg->multicast_rx = multicast_rx;
+		list_add(&nreg->list, &wdev->mgmt_registrations);
+	}
+	wdev->mgmt_registrations_need_update = 1;
+	spin_unlock_bh(&rdev->mgmt_registrations_lock);
+
+	cfg80211_mgmt_registrations_update(wdev);
+
+	return 0;
+
+ out:
+	kfree(nreg);
+	spin_unlock_bh(&rdev->mgmt_registrations_lock);
+
+	return err;
+}
+
+void cfg80211_mlme_unregister_socket(struct wireless_dev *wdev, u32 nlportid)
+{
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	struct cfg80211_mgmt_registration *reg, *tmp;
+
+	spin_lock_bh(&rdev->mgmt_registrations_lock);
+
+	list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
+		if (reg->nlportid != nlportid)
+			continue;
+
+		list_del(&reg->list);
+		kfree(reg);
+
+		wdev->mgmt_registrations_need_update = 1;
+		schedule_work(&rdev->mgmt_registrations_update_wk);
+	}
+
+	spin_unlock_bh(&rdev->mgmt_registrations_lock);
+
+	if (nlportid && rdev->crit_proto_nlportid == nlportid) {
+		rdev->crit_proto_nlportid = 0;
+		rdev_crit_proto_stop(rdev, wdev);
+	}
+
+	if (nlportid == wdev->unexpected_nlportid)
+		wdev->unexpected_nlportid = 0;
+}
+
+void cfg80211_mlme_purge_registrations(struct wireless_dev *wdev)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
+	struct cfg80211_mgmt_registration *reg, *tmp;
+
+	spin_lock_bh(&rdev->mgmt_registrations_lock);
+	list_for_each_entry_safe(reg, tmp, &wdev->mgmt_registrations, list) {
+		list_del(&reg->list);
+		kfree(reg);
+	}
+	wdev->mgmt_registrations_need_update = 1;
+	spin_unlock_bh(&rdev->mgmt_registrations_lock);
+
+	cfg80211_mgmt_registrations_update(wdev);
+}
+
+static bool cfg80211_allowed_address(struct wireless_dev *wdev, const u8 *addr)
+{
+	int i;
+
+	for_each_valid_link(wdev, i) {
+		if (ether_addr_equal(addr, wdev->links[i].addr))
+			return true;
+	}
+
+	return ether_addr_equal(addr, wdev_address(wdev));
+}
+
+static bool cfg80211_allowed_random_address(struct wireless_dev *wdev,
+					    const struct ieee80211_mgmt *mgmt)
+{
+	if (ieee80211_is_auth(mgmt->frame_control) ||
+	    ieee80211_is_deauth(mgmt->frame_control)) {
+		/* Allow random TA to be used with authentication and
+		 * deauthentication frames if the driver has indicated support.
+		 */
+		if (wiphy_ext_feature_isset(
+			    wdev->wiphy,
+			    NL80211_EXT_FEATURE_AUTH_AND_DEAUTH_RANDOM_TA))
+			return true;
+	} else if (ieee80211_is_action(mgmt->frame_control) &&
+		   mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
+		/* Allow random TA to be used with Public Action frames if the
+		 * driver has indicated support.
+		 */
+		if (!wdev->connected &&
+		    wiphy_ext_feature_isset(
+			    wdev->wiphy,
+			    NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA))
+			return true;
+
+		if (wdev->connected &&
+		    wiphy_ext_feature_isset(
+			    wdev->wiphy,
+			    NL80211_EXT_FEATURE_MGMT_TX_RANDOM_TA_CONNECTED))
+			return true;
+	}
+
+	return false;
+}
+
+int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
+			  struct wireless_dev *wdev,
+			  struct cfg80211_mgmt_tx_params *params, u64 cookie)
+{
+	const struct ieee80211_mgmt *mgmt;
+	u16 stype;
+
+	lockdep_assert_wiphy(&rdev->wiphy);
+
+	if (!wdev->wiphy->mgmt_stypes)
+		return -EOPNOTSUPP;
+
+	if (!rdev->ops->mgmt_tx)
+		return -EOPNOTSUPP;
+
+	if (params->len < 24 + 1)
+		return -EINVAL;
+
+	mgmt = (const struct ieee80211_mgmt *)params->buf;
+
+	if (!ieee80211_is_mgmt(mgmt->frame_control) ||
+	    ieee80211_has_order(mgmt->frame_control))
+		return -EINVAL;
+
+	stype = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE;
+	if (!(wdev->wiphy->mgmt_stypes[wdev->iftype].tx & BIT(stype >> 4)))
+		return -EINVAL;
+
+	if (ieee80211_is_action(mgmt->frame_control) &&
+	    mgmt->u.action.category != WLAN_CATEGORY_PUBLIC) {
+		int err = 0;
+
+		switch (wdev->iftype) {
+		case NL80211_IFTYPE_ADHOC:
+			/*
+			 * check for IBSS DA must be done by driver as
+			 * cfg80211 doesn't track the stations
+			 */
+			if (!wdev->u.ibss.current_bss ||
+			    !ether_addr_equal(wdev->u.ibss.current_bss->pub.bssid,
+					      mgmt->bssid)) {
+				err = -ENOTCONN;
+				break;
+			}
+			break;
+		case NL80211_IFTYPE_STATION:
+		case NL80211_IFTYPE_P2P_CLIENT:
+			if (!wdev->connected) {
+				err = -ENOTCONN;
+				break;
+			}
+
+			/* FIXME: MLD may address this differently */
+
+			if (!ether_addr_equal(wdev->u.client.connected_addr,
+					      mgmt->bssid)) {
+				err = -ENOTCONN;
+				break;
+			}
+
+			/* for station, check that DA is the AP */
+			if (!ether_addr_equal(wdev->u.client.connected_addr,
+					      mgmt->da)) {
+				err = -ENOTCONN;
+				break;
+			}
+			break;
+		case NL80211_IFTYPE_AP:
+		case NL80211_IFTYPE_P2P_GO:
+		case NL80211_IFTYPE_AP_VLAN:
+			if (!ether_addr_equal(mgmt->bssid, wdev_address(wdev)) &&
+			    (params->link_id < 0 ||
+			     !ether_addr_equal(mgmt->bssid,
+					       wdev->links[params->link_id].addr)))
+				err = -EINVAL;
+			break;
+		case NL80211_IFTYPE_MESH_POINT:
+			if (!ether_addr_equal(mgmt->sa, mgmt->bssid)) {
+				err = -EINVAL;
+				break;
+			}
+			/*
+			 * check for mesh DA must be done by driver as
+			 * cfg80211 doesn't track the stations
+			 */
+			break;
+		case NL80211_IFTYPE_NAN:
+		case NL80211_IFTYPE_NAN_DATA:
+			if (mgmt->u.action.category !=
+			    WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION)
+				err = -EOPNOTSUPP;
+			break;
+		case NL80211_IFTYPE_P2P_DEVICE:
+			/*
+			 * fall through, P2P device only supports
+			 * public action frames
+			 */
+		case NL80211_IFTYPE_PD:
+		default:
+			err = -EOPNOTSUPP;
+			break;
+		}
+
+		if (err)
+			return err;
+	}
+
+	if (!cfg80211_allowed_address(wdev, mgmt->sa) &&
+	    !cfg80211_allowed_random_address(wdev, mgmt))
+		return -EINVAL;
+
+	/* Transmit the management frame as requested by user space */
+	return rdev_mgmt_tx(rdev, wdev, params, cookie);
+}
+
+bool cfg80211_rx_mgmt_ext(struct wireless_dev *wdev,
+			  struct cfg80211_rx_info *info)
+{
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	struct cfg80211_mgmt_registration *reg;
+	const struct ieee80211_txrx_stypes *stypes =
+		&wiphy->mgmt_stypes[wdev->iftype];
+	struct ieee80211_mgmt *mgmt = (void *)info->buf;
+	const u8 *data;
+	int data_len;
+	bool result = false;
+	__le16 ftype = mgmt->frame_control &
+		cpu_to_le16(IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE);
+	u16 stype;
+
+	trace_cfg80211_rx_mgmt(wdev, info);
+	stype = (le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_STYPE) >> 4;
+
+	if (!(stypes->rx & BIT(stype))) {
+		trace_cfg80211_return_bool(false);
+		return false;
+	}
+
+	data = info->buf + ieee80211_hdrlen(mgmt->frame_control);
+	data_len = info->len - ieee80211_hdrlen(mgmt->frame_control);
+
+	spin_lock_bh(&rdev->mgmt_registrations_lock);
+
+	list_for_each_entry(reg, &wdev->mgmt_registrations, list) {
+		if (reg->frame_type != ftype)
+			continue;
+
+		if (reg->match_len > data_len)
+			continue;
+
+		if (memcmp(reg->match, data, reg->match_len))
+			continue;
+
+		/* found match! */
+
+		/* Indicate the received Action frame to user space */
+		if (nl80211_send_mgmt(rdev, wdev, reg->nlportid, info,
+				      GFP_ATOMIC))
+			continue;
+
+		result = true;
+		break;
+	}
+
+	spin_unlock_bh(&rdev->mgmt_registrations_lock);
+
+	trace_cfg80211_return_bool(result);
+	return result;
+}
+EXPORT_SYMBOL(cfg80211_rx_mgmt_ext);
+
+void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev)
+{
+	cancel_delayed_work(&rdev->dfs_update_channels_wk);
+	queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk, 0);
+}
+
+void cfg80211_dfs_channels_update_work(struct work_struct *work)
+{
+	struct delayed_work *delayed_work = to_delayed_work(work);
+	struct cfg80211_registered_device *rdev;
+	struct cfg80211_chan_def chandef;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_channel *c;
+	struct wiphy *wiphy;
+	bool check_again = false;
+	unsigned long timeout, next_time = 0;
+	unsigned long time_dfs_update;
+	enum nl80211_radar_event radar_event;
+	int bandid, i;
+
+	rdev = container_of(delayed_work, struct cfg80211_registered_device,
+			    dfs_update_channels_wk);
+	wiphy = &rdev->wiphy;
+
+	rtnl_lock();
+	for (bandid = 0; bandid < NUM_NL80211_BANDS; bandid++) {
+		sband = wiphy->bands[bandid];
+		if (!sband)
+			continue;
+
+		for (i = 0; i < sband->n_channels; i++) {
+			c = &sband->channels[i];
+
+			if (!(c->flags & IEEE80211_CHAN_RADAR))
+				continue;
+
+			if (c->dfs_state != NL80211_DFS_UNAVAILABLE &&
+			    c->dfs_state != NL80211_DFS_AVAILABLE)
+				continue;
+
+			if (c->dfs_state == NL80211_DFS_UNAVAILABLE) {
+				time_dfs_update = IEEE80211_DFS_MIN_NOP_TIME_MS;
+				radar_event = NL80211_RADAR_NOP_FINISHED;
+			} else {
+				if (regulatory_pre_cac_allowed(wiphy) ||
+				    cfg80211_any_wiphy_oper_chan(wiphy, c))
+					continue;
+
+				time_dfs_update = REG_PRE_CAC_EXPIRY_GRACE_MS;
+				radar_event = NL80211_RADAR_PRE_CAC_EXPIRED;
+			}
+
+			timeout = c->dfs_state_entered +
+				  msecs_to_jiffies(time_dfs_update);
+
+			if (time_after_eq(jiffies, timeout)) {
+				c->dfs_state = NL80211_DFS_USABLE;
+				c->dfs_state_entered = jiffies;
+
+				cfg80211_chandef_create(&chandef, c,
+							NL80211_CHAN_NO_HT);
+
+				nl80211_radar_notify(rdev, &chandef,
+						     radar_event, NULL,
+						     GFP_ATOMIC);
+
+				regulatory_propagate_dfs_state(wiphy, &chandef,
+							       c->dfs_state,
+							       radar_event);
+				continue;
+			}
+
+			if (!check_again)
+				next_time = timeout - jiffies;
+			else
+				next_time = min(next_time, timeout - jiffies);
+			check_again = true;
+		}
+	}
+	rtnl_unlock();
+
+	/* reschedule if there are other channels waiting to be cleared again */
+	if (check_again)
+		queue_delayed_work(cfg80211_wq, &rdev->dfs_update_channels_wk,
+				   next_time);
+}
+
+
+void __cfg80211_radar_event(struct wiphy *wiphy,
+			    struct cfg80211_chan_def *chandef,
+			    bool offchan, gfp_t gfp)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	trace_cfg80211_radar_event(wiphy, chandef, offchan);
+
+	/* only set the chandef supplied channel to unavailable, in
+	 * case the radar is detected on only one of multiple channels
+	 * spanned by the chandef.
+	 */
+	cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_UNAVAILABLE);
+
+	if (offchan) {
+		cancel_delayed_work(&rdev->background_cac_done_wk);
+		queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
+	}
+
+	cfg80211_sched_dfs_chan_update(rdev);
+
+	nl80211_radar_notify(rdev, chandef, NL80211_RADAR_DETECTED, NULL, gfp);
+
+	memcpy(&rdev->radar_chandef, chandef, sizeof(struct cfg80211_chan_def));
+	queue_work(cfg80211_wq, &rdev->propagate_radar_detect_wk);
+}
+EXPORT_SYMBOL(__cfg80211_radar_event);
+
+void cfg80211_cac_event(struct net_device *netdev,
+			const struct cfg80211_chan_def *chandef,
+			enum nl80211_radar_event event, gfp_t gfp,
+			unsigned int link_id)
+{
+	struct wireless_dev *wdev = netdev->ieee80211_ptr;
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	unsigned long timeout;
+
+	if (WARN_ON(wdev->valid_links &&
+		    !(wdev->valid_links & BIT(link_id))))
+		return;
+
+	trace_cfg80211_cac_event(netdev, event, link_id);
+
+	if (WARN_ON(!wdev->links[link_id].cac_started &&
+		    event != NL80211_RADAR_CAC_STARTED))
+		return;
+
+	switch (event) {
+	case NL80211_RADAR_CAC_FINISHED:
+		timeout = wdev->links[link_id].cac_start_time +
+			  msecs_to_jiffies(wdev->links[link_id].cac_time_ms);
+		WARN_ON(!time_after_eq(jiffies, timeout));
+		cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
+		memcpy(&rdev->cac_done_chandef, chandef,
+		       sizeof(struct cfg80211_chan_def));
+		queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
+		cfg80211_sched_dfs_chan_update(rdev);
+		fallthrough;
+	case NL80211_RADAR_CAC_ABORTED:
+		wdev->links[link_id].cac_started = false;
+		cfg80211_set_cac_state(wiphy, chandef, false);
+		break;
+	case NL80211_RADAR_CAC_STARTED:
+		wdev->links[link_id].cac_started = true;
+		cfg80211_set_cac_state(wiphy, chandef, true);
+		break;
+	default:
+		WARN_ON(1);
+		return;
+	}
+
+	nl80211_radar_notify(rdev, chandef, event, netdev, gfp);
+}
+EXPORT_SYMBOL(cfg80211_cac_event);
+
+static void
+__cfg80211_background_cac_event(struct cfg80211_registered_device *rdev,
+				struct wireless_dev *wdev,
+				const struct cfg80211_chan_def *chandef,
+				enum nl80211_radar_event event)
+{
+	struct wiphy *wiphy = &rdev->wiphy;
+	struct net_device *netdev;
+
+	lockdep_assert_wiphy(&rdev->wiphy);
+
+	if (!cfg80211_chandef_valid(chandef))
+		return;
+
+	switch (event) {
+	case NL80211_RADAR_CAC_FINISHED:
+		cfg80211_set_dfs_state(wiphy, chandef, NL80211_DFS_AVAILABLE);
+		cfg80211_set_cac_state(wiphy, chandef, false);
+		memcpy(&rdev->cac_done_chandef, chandef, sizeof(*chandef));
+		queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
+		cfg80211_sched_dfs_chan_update(rdev);
+		break;
+	case NL80211_RADAR_CAC_ABORTED:
+		cfg80211_set_cac_state(wiphy, chandef, false);
+		if (!cancel_delayed_work(&rdev->background_cac_done_wk))
+			return;
+		break;
+	case NL80211_RADAR_CAC_STARTED:
+		cfg80211_set_cac_state(wiphy, chandef, true);
+		break;
+	default:
+		return;
+	}
+
+	netdev = wdev ? wdev->netdev : NULL;
+	nl80211_radar_notify(rdev, chandef, event, netdev, GFP_KERNEL);
+}
+
+void cfg80211_background_cac_done_wk(struct work_struct *work)
+{
+	struct delayed_work *delayed_work = to_delayed_work(work);
+	struct cfg80211_registered_device *rdev;
+
+	rdev = container_of(delayed_work, struct cfg80211_registered_device,
+			    background_cac_done_wk);
+
+	guard(wiphy)(&rdev->wiphy);
+
+	rdev_set_radar_background(rdev, NULL);
+
+	__cfg80211_background_cac_event(rdev, rdev->background_radar_wdev,
+					&rdev->background_radar_chandef,
+					NL80211_RADAR_CAC_FINISHED);
+
+	rdev->background_radar_wdev = NULL;
+}
+
+void cfg80211_background_cac_abort_wk(struct work_struct *work)
+{
+	struct cfg80211_registered_device *rdev;
+	struct wireless_dev *wdev;
+
+	rdev = container_of(work, struct cfg80211_registered_device,
+			    background_cac_abort_wk);
+
+	guard(wiphy)(&rdev->wiphy);
+
+	wdev = rdev->background_radar_wdev;
+	if (wdev)
+		cfg80211_stop_background_radar_detection(wdev);
+}
+
+void cfg80211_background_cac_abort(struct wiphy *wiphy)
+{
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	queue_work(cfg80211_wq, &rdev->background_cac_abort_wk);
+}
+EXPORT_SYMBOL(cfg80211_background_cac_abort);
+
+int
+cfg80211_start_background_radar_detection(struct cfg80211_registered_device *rdev,
+					  struct wireless_dev *wdev,
+					  struct cfg80211_chan_def *chandef)
+{
+	unsigned int cac_time_ms;
+	int err;
+
+	lockdep_assert_wiphy(&rdev->wiphy);
+
+	if (!wiphy_ext_feature_isset(&rdev->wiphy,
+				     NL80211_EXT_FEATURE_RADAR_BACKGROUND))
+		return -EOPNOTSUPP;
+
+	/* Offchannel chain already locked by another wdev */
+	if (rdev->background_radar_wdev && rdev->background_radar_wdev != wdev)
+		return -EBUSY;
+
+	/* CAC already in progress on the offchannel chain */
+	if (rdev->background_radar_wdev == wdev &&
+	    delayed_work_pending(&rdev->background_cac_done_wk))
+		return -EBUSY;
+
+	err = rdev_set_radar_background(rdev, chandef);
+	if (err)
+		return err;
+
+	cac_time_ms = cfg80211_chandef_dfs_cac_time(&rdev->wiphy, chandef);
+	if (!cac_time_ms)
+		cac_time_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
+
+	rdev->background_radar_chandef = *chandef;
+	rdev->background_radar_wdev = wdev; /* Get offchain ownership */
+
+	__cfg80211_background_cac_event(rdev, wdev, chandef,
+					NL80211_RADAR_CAC_STARTED);
+	queue_delayed_work(cfg80211_wq, &rdev->background_cac_done_wk,
+			   msecs_to_jiffies(cac_time_ms));
+
+	return 0;
+}
+
+void cfg80211_stop_radar_detection(struct wireless_dev *wdev)
+{
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+	int link_id;
+
+	for_each_valid_link(wdev, link_id) {
+		struct cfg80211_chan_def chandef;
+
+		if (!wdev->links[link_id].cac_started)
+			continue;
+
+		chandef = *wdev_chandef(wdev, link_id);
+		rdev_end_cac(rdev, wdev->netdev, link_id);
+		wdev->links[link_id].cac_started = false;
+		cfg80211_set_cac_state(wiphy, &chandef, false);
+		nl80211_radar_notify(rdev, &chandef, NL80211_RADAR_CAC_ABORTED,
+				     wdev->netdev, GFP_KERNEL);
+	}
+}
+
+void cfg80211_stop_background_radar_detection(struct wireless_dev *wdev)
+{
+	struct wiphy *wiphy = wdev->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+	lockdep_assert_wiphy(wiphy);
+
+	if (wdev != rdev->background_radar_wdev)
+		return;
+
+	rdev_set_radar_background(rdev, NULL);
+
+	__cfg80211_background_cac_event(rdev, wdev,
+					&rdev->background_radar_chandef,
+					NL80211_RADAR_CAC_ABORTED);
+
+	rdev->background_radar_wdev = NULL;
+}
+
+int cfg80211_assoc_ml_reconf(struct cfg80211_registered_device *rdev,
+			     struct net_device *dev,
+			     struct cfg80211_ml_reconf_req *req)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	int err;
+
+	lockdep_assert_wiphy(wdev->wiphy);
+
+	err = rdev_assoc_ml_reconf(rdev, dev, req);
+	if (!err) {
+		int link_id;
+
+		for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS;
+		     link_id++) {
+			if (!req->add_links[link_id].bss)
+				continue;
+
+			cfg80211_ref_bss(&rdev->wiphy, req->add_links[link_id].bss);
+			cfg80211_hold_bss(bss_from_pub(req->add_links[link_id].bss));
+		}
+	}
+
+	return err;
+}
+
+void cfg80211_mlo_reconf_add_done(struct net_device *dev,
+				  struct cfg80211_mlo_reconf_done_data *data)
+{
+	struct wireless_dev *wdev = dev->ieee80211_ptr;
+	struct wiphy *wiphy = wdev->wiphy;
+	int link_id;
+
+	lockdep_assert_wiphy(wiphy);
+
+	trace_cfg80211_mlo_reconf_add_done(dev, data->added_links,
+					   data->buf, data->len,
+					   data->driver_initiated);
+
+	if (WARN_ON(!wdev->valid_links))
+		return;
+
+	if (WARN_ON(wdev->iftype != NL80211_IFTYPE_STATION &&
+		    wdev->iftype != NL80211_IFTYPE_P2P_CLIENT))
+		return;
+
+	/* validate that a BSS is given for each added link */
+	for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) {
+		struct cfg80211_bss *bss = data->links[link_id].bss;
+
+		if (!(data->added_links & BIT(link_id)))
+			continue;
+
+		if (WARN_ON(!bss))
+			return;
+	}
+
+	for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) {
+		struct cfg80211_bss *bss = data->links[link_id].bss;
+
+		if (!bss)
+			continue;
+
+		if (data->added_links & BIT(link_id)) {
+			wdev->links[link_id].client.current_bss =
+				bss_from_pub(bss);
+
+			if (data->driver_initiated)
+				cfg80211_hold_bss(bss_from_pub(bss));
+
+			memcpy(wdev->links[link_id].addr,
+			       data->links[link_id].addr,
+			       ETH_ALEN);
+		} else {
+			if (!data->driver_initiated)
+				cfg80211_unhold_bss(bss_from_pub(bss));
+
+			cfg80211_put_bss(wiphy, bss);
+		}
+	}
+
+	wdev->valid_links |= data->added_links;
+	nl80211_mlo_reconf_add_done(dev, data);
+}
+EXPORT_SYMBOL(cfg80211_mlo_reconf_add_done);