Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

1 files changed, 1209 insertions, 0 deletions

diff --git a/net/mac80211/parse.c b/net/mac80211/parse.c
new file mode 100644
index 000000000..cb2be167c
--- /dev/null
+++ b/net/mac80211/parse.c
@@ -0,0 +1,1209 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2002-2005, Instant802 Networks, Inc.
+ * Copyright 2005-2006, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
+ * Copyright 2013-2014  Intel Mobile Communications GmbH
+ * Copyright (C) 2015-2017	Intel Deutschland GmbH
+ * Copyright (C) 2018-2026 Intel Corporation
+ *
+ * element parsing for mac80211
+ */
+
+#include <net/mac80211.h>
+#include <linux/netdevice.h>
+#include <linux/export.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/if_arp.h>
+#include <linux/bitmap.h>
+#include <linux/crc32.h>
+#include <net/net_namespace.h>
+#include <net/cfg80211.h>
+#include <net/rtnetlink.h>
+#include <kunit/visibility.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "mesh.h"
+#include "wme.h"
+#include "led.h"
+#include "wep.h"
+
+static const u8 empty_non_inheritance[] = {
+	WLAN_EID_EXTENSION, 1, WLAN_EID_EXT_NON_INHERITANCE,
+	/*
+	 * cfg80211_is_element_inherited() hardcodes elements that
+	 * cannot be inherited, so we just need an empty one to be
+	 * calling it at all.
+	 */
+};
+
+struct ieee80211_elem_defrag {
+	const struct element *elem;
+	/* container start/len */
+	const u8 *start;
+	size_t len;
+};
+
+struct ieee80211_elems_parse {
+	/* must be first for kfree to work */
+	struct ieee802_11_elems elems;
+
+	struct ieee80211_elem_defrag ml_reconf, ml_epcs, ml_basic;
+
+	bool inside_multilink;
+	bool skip_vendor;
+
+	/*
+	 * scratch buffer that can be used for various element parsing related
+	 * tasks, e.g., element de-fragmentation etc.
+	 */
+	size_t scratch_len;
+	u8 *scratch_pos;
+	u8 scratch[] __counted_by(scratch_len);
+};
+
+static void
+ieee80211_parse_extension_element(u32 *crc,
+				  const struct element *elem,
+				  struct ieee80211_elems_parse *elems_parse,
+				  struct ieee80211_elems_parse_params *params)
+{
+	struct ieee802_11_elems *elems = &elems_parse->elems;
+	const void *data = elem->data + 1;
+	bool calc_crc = false;
+	u8 len;
+
+	if (!elem->datalen)
+		return;
+
+	len = elem->datalen - 1;
+
+	switch (elem->data[0]) {
+	case WLAN_EID_EXT_HE_MU_EDCA:
+		if (params->mode < IEEE80211_CONN_MODE_HE)
+			break;
+		calc_crc = true;
+		if (len >= sizeof(*elems->mu_edca_param_set))
+			elems->mu_edca_param_set = data;
+		break;
+	case WLAN_EID_EXT_HE_CAPABILITY:
+		if (params->mode < IEEE80211_CONN_MODE_HE)
+			break;
+		if (ieee80211_he_capa_size_ok(data, len)) {
+			elems->he_cap = data;
+			elems->he_cap_len = len;
+		}
+		break;
+	case WLAN_EID_EXT_HE_OPERATION:
+		if (params->mode < IEEE80211_CONN_MODE_HE)
+			break;
+		calc_crc = true;
+		if (len >= sizeof(*elems->he_operation) &&
+		    len >= ieee80211_he_oper_size(data) - 1)
+			elems->he_operation = data;
+		break;
+	case WLAN_EID_EXT_UORA:
+		if (params->mode < IEEE80211_CONN_MODE_HE)
+			break;
+		if (len >= 1)
+			elems->uora_element = data;
+		break;
+	case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
+		if (len == 3)
+			elems->max_channel_switch_time = data;
+		break;
+	case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
+		if (len >= sizeof(*elems->mbssid_config_ie))
+			elems->mbssid_config_ie = data;
+		break;
+	case WLAN_EID_EXT_HE_SPR:
+		if (params->mode < IEEE80211_CONN_MODE_HE)
+			break;
+		if (len >= sizeof(*elems->he_spr) &&
+		    len >= ieee80211_he_spr_size(data) - 1)
+			elems->he_spr = data;
+		break;
+	case WLAN_EID_EXT_HE_6GHZ_CAPA:
+		if (params->mode < IEEE80211_CONN_MODE_HE)
+			break;
+		if (len >= sizeof(*elems->he_6ghz_capa))
+			elems->he_6ghz_capa = data;
+		break;
+	case WLAN_EID_EXT_EHT_CAPABILITY:
+		if (params->mode < IEEE80211_CONN_MODE_EHT)
+			break;
+		if (ieee80211_eht_capa_size_ok(elems->he_cap,
+					       data, len,
+					       params->from_ap)) {
+			elems->eht_cap = data;
+			elems->eht_cap_len = len;
+		}
+		break;
+	case WLAN_EID_EXT_EHT_OPERATION:
+		if (params->mode < IEEE80211_CONN_MODE_EHT)
+			break;
+		if (ieee80211_eht_oper_size_ok(data, len))
+			elems->eht_operation = data;
+		calc_crc = true;
+		break;
+	case WLAN_EID_EXT_EHT_MULTI_LINK:
+		if (params->mode < IEEE80211_CONN_MODE_EHT)
+			break;
+		calc_crc = true;
+
+		if (ieee80211_mle_size_ok(data, len)) {
+			const struct ieee80211_multi_link_elem *mle =
+				(void *)data;
+
+			switch (le16_get_bits(mle->control,
+					      IEEE80211_ML_CONTROL_TYPE)) {
+			case IEEE80211_ML_CONTROL_TYPE_BASIC:
+				if (elems_parse->inside_multilink) {
+					elems->parse_error |=
+						IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC;
+					break;
+				}
+				elems_parse->ml_basic.elem = elem;
+				elems_parse->ml_basic.start = params->start;
+				elems_parse->ml_basic.len = params->len;
+				break;
+			case IEEE80211_ML_CONTROL_TYPE_RECONF:
+				elems_parse->ml_reconf.elem = elem;
+				elems_parse->ml_reconf.start = params->start;
+				elems_parse->ml_reconf.len = params->len;
+				break;
+			case IEEE80211_ML_CONTROL_TYPE_PRIO_ACCESS:
+				elems_parse->ml_epcs.elem = elem;
+				elems_parse->ml_epcs.start = params->start;
+				elems_parse->ml_epcs.len = params->len;
+				break;
+			default:
+				break;
+			}
+		}
+		break;
+	case WLAN_EID_EXT_BANDWIDTH_INDICATION:
+		if (params->mode < IEEE80211_CONN_MODE_EHT)
+			break;
+		if (ieee80211_bandwidth_indication_size_ok(data, len))
+			elems->bandwidth_indication = data;
+		calc_crc = true;
+		break;
+	case WLAN_EID_EXT_TID_TO_LINK_MAPPING:
+		if (params->mode < IEEE80211_CONN_MODE_EHT)
+			break;
+		calc_crc = true;
+		if (ieee80211_tid_to_link_map_size_ok(data, len) &&
+		    elems->ttlm_num < ARRAY_SIZE(elems->ttlm)) {
+			elems->ttlm[elems->ttlm_num] = (void *)data;
+			elems->ttlm_num++;
+		}
+		break;
+	case WLAN_EID_EXT_UHR_OPER:
+		if (params->mode < IEEE80211_CONN_MODE_UHR)
+			break;
+		calc_crc = true;
+		if (ieee80211_uhr_oper_size_ok(data, len)) {
+			elems->uhr_operation = data;
+			elems->uhr_operation_len = len;
+		}
+		break;
+	case WLAN_EID_EXT_UHR_CAPA:
+		if (params->mode < IEEE80211_CONN_MODE_UHR)
+			break;
+		calc_crc = true;
+		if (ieee80211_uhr_capa_size_ok(data, len, true)) {
+			elems->uhr_cap = data;
+			elems->uhr_cap_len = len;
+		}
+		break;
+	}
+
+	if (crc && calc_crc)
+		*crc = crc32_be(*crc, (void *)elem, elem->datalen + 2);
+}
+
+static void ieee80211_parse_tpe(struct ieee80211_parsed_tpe *tpe,
+				const u8 *data, u8 len)
+{
+	const struct ieee80211_tx_pwr_env *env = (const void *)data;
+	u8 count, interpret, category;
+	u8 *out, N, *cnt_out = NULL, *N_out = NULL;
+
+	if (!ieee80211_valid_tpe_element(data, len))
+		return;
+
+	count = u8_get_bits(env->info, IEEE80211_TX_PWR_ENV_INFO_COUNT);
+	interpret = u8_get_bits(env->info, IEEE80211_TX_PWR_ENV_INFO_INTERPRET);
+	category = u8_get_bits(env->info, IEEE80211_TX_PWR_ENV_INFO_CATEGORY);
+
+	switch (interpret) {
+	case IEEE80211_TPE_LOCAL_EIRP:
+		out = tpe->max_local[category].power;
+		cnt_out = &tpe->max_local[category].count;
+		tpe->max_local[category].valid = true;
+		break;
+	case IEEE80211_TPE_REG_CLIENT_EIRP:
+		out = tpe->max_reg_client[category].power;
+		cnt_out = &tpe->max_reg_client[category].count;
+		tpe->max_reg_client[category].valid = true;
+		break;
+	case IEEE80211_TPE_LOCAL_EIRP_PSD:
+		out = tpe->psd_local[category].power;
+		cnt_out = &tpe->psd_local[category].count;
+		N_out = &tpe->psd_local[category].n;
+		tpe->psd_local[category].valid = true;
+		break;
+	case IEEE80211_TPE_REG_CLIENT_EIRP_PSD:
+		out = tpe->psd_reg_client[category].power;
+		cnt_out = &tpe->psd_reg_client[category].count;
+		N_out = &tpe->psd_reg_client[category].n;
+		tpe->psd_reg_client[category].valid = true;
+		break;
+	}
+
+	switch (interpret) {
+	case IEEE80211_TPE_LOCAL_EIRP:
+	case IEEE80211_TPE_REG_CLIENT_EIRP:
+		/* count was validated <= 3, plus 320 MHz */
+		BUILD_BUG_ON(IEEE80211_TPE_EIRP_ENTRIES_320MHZ < 5);
+		memcpy(out, env->variable, count + 1);
+		*cnt_out = count + 1;
+		/* separately take 320 MHz if present */
+		if (count == 3 && len > sizeof(*env) + count + 1) {
+			out[4] = env->variable[4];
+			*cnt_out = 5;
+		}
+		break;
+	case IEEE80211_TPE_LOCAL_EIRP_PSD:
+	case IEEE80211_TPE_REG_CLIENT_EIRP_PSD:
+		if (!count) {
+			memset(out, env->variable[0],
+			       IEEE80211_TPE_PSD_ENTRIES_320MHZ);
+			*cnt_out = IEEE80211_TPE_PSD_ENTRIES_320MHZ;
+			break;
+		}
+
+		N = 1 << (count - 1);
+		memcpy(out, env->variable, N);
+		*cnt_out = N;
+		*N_out = N;
+
+		if (len > sizeof(*env) + N) {
+			int K = u8_get_bits(env->variable[N],
+					    IEEE80211_TX_PWR_ENV_EXT_COUNT);
+
+			K = min(K, IEEE80211_TPE_PSD_ENTRIES_320MHZ - N);
+			memcpy(out + N, env->variable + N + 1, K);
+			(*cnt_out) += K;
+		}
+		break;
+	}
+}
+
+static u32
+_ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params,
+			     struct ieee80211_elems_parse *elems_parse,
+			     const struct element *check_inherit)
+{
+	struct ieee802_11_elems *elems = &elems_parse->elems;
+	const struct element *elem;
+	bool calc_crc = params->filter != 0;
+	DECLARE_BITMAP(seen_elems, 256);
+	u32 crc = params->crc;
+
+	bitmap_zero(seen_elems, 256);
+
+	switch (params->type) {
+	/* we don't need to parse assoc request, luckily (it's value 0) */
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_REQ:
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_REQ:
+	default:
+		WARN(1, "invalid frame type 0x%x for element parsing\n",
+		     params->type);
+		break;
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ASSOC_RESP:
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_REASSOC_RESP:
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ:
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP:
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON:
+	case IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_ACTION:
+	case IEEE80211_FTYPE_EXT | IEEE80211_STYPE_S1G_BEACON:
+		break;
+	}
+
+	for_each_element(elem, params->start, params->len) {
+		const struct element *subelem;
+		u8 elem_parse_failed;
+		u8 id = elem->id;
+		u8 elen = elem->datalen;
+		const u8 *pos = elem->data;
+
+		if (check_inherit &&
+		    !cfg80211_is_element_inherited(elem,
+						   check_inherit))
+			continue;
+
+		switch (id) {
+		case WLAN_EID_SSID:
+		case WLAN_EID_SUPP_RATES:
+		case WLAN_EID_FH_PARAMS:
+		case WLAN_EID_DS_PARAMS:
+		case WLAN_EID_CF_PARAMS:
+		case WLAN_EID_TIM:
+		case WLAN_EID_IBSS_PARAMS:
+		case WLAN_EID_CHALLENGE:
+		case WLAN_EID_RSN:
+		case WLAN_EID_ERP_INFO:
+		case WLAN_EID_EXT_SUPP_RATES:
+		case WLAN_EID_HT_CAPABILITY:
+		case WLAN_EID_HT_OPERATION:
+		case WLAN_EID_VHT_CAPABILITY:
+		case WLAN_EID_VHT_OPERATION:
+		case WLAN_EID_MESH_ID:
+		case WLAN_EID_MESH_CONFIG:
+		case WLAN_EID_PEER_MGMT:
+		case WLAN_EID_PREQ:
+		case WLAN_EID_PREP:
+		case WLAN_EID_PERR:
+		case WLAN_EID_RANN:
+		case WLAN_EID_CHANNEL_SWITCH:
+		case WLAN_EID_EXT_CHANSWITCH_ANN:
+		case WLAN_EID_COUNTRY:
+		case WLAN_EID_PWR_CONSTRAINT:
+		case WLAN_EID_TIMEOUT_INTERVAL:
+		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
+		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
+		case WLAN_EID_CHAN_SWITCH_PARAM:
+		case WLAN_EID_EXT_CAPABILITY:
+		case WLAN_EID_CHAN_SWITCH_TIMING:
+		case WLAN_EID_LINK_ID:
+		case WLAN_EID_BSS_MAX_IDLE_PERIOD:
+		case WLAN_EID_RSNX:
+		case WLAN_EID_S1G_BCN_COMPAT:
+		case WLAN_EID_S1G_CAPABILITIES:
+		case WLAN_EID_S1G_OPERATION:
+		case WLAN_EID_AID_RESPONSE:
+		case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
+		/*
+		 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
+		 * that if the content gets bigger it might be needed more than once
+		 */
+			if (test_bit(id, seen_elems)) {
+				elems->parse_error |=
+					IEEE80211_PARSE_ERR_DUP_ELEM;
+				continue;
+			}
+			break;
+		}
+
+		if (calc_crc && id < 64 && (params->filter & (1ULL << id)))
+			crc = crc32_be(crc, pos - 2, elen + 2);
+
+		elem_parse_failed = 0;
+
+		switch (id) {
+		case WLAN_EID_LINK_ID:
+			if (elen + 2 < sizeof(struct ieee80211_tdls_lnkie)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->lnk_id = (void *)(pos - 2);
+			break;
+		case WLAN_EID_CHAN_SWITCH_TIMING:
+			if (elen < sizeof(struct ieee80211_ch_switch_timing)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->ch_sw_timing = (void *)pos;
+			break;
+		case WLAN_EID_EXT_CAPABILITY:
+			elems->ext_capab = pos;
+			elems->ext_capab_len = elen;
+			break;
+		case WLAN_EID_SSID:
+			elems->ssid = pos;
+			elems->ssid_len = elen;
+			break;
+		case WLAN_EID_SUPP_RATES:
+			elems->supp_rates = pos;
+			elems->supp_rates_len = elen;
+			break;
+		case WLAN_EID_DS_PARAMS:
+			if (elen >= 1)
+				elems->ds_params = pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_TIM:
+			if (elen >= sizeof(struct ieee80211_tim_ie)) {
+				elems->tim = (void *)pos;
+				elems->tim_len = elen;
+			} else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_VENDOR_SPECIFIC:
+			if (elems_parse->skip_vendor)
+				break;
+
+			if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
+			    pos[2] == 0xf2) {
+				/* Microsoft OUI (00:50:F2) */
+
+				if (calc_crc)
+					crc = crc32_be(crc, pos - 2, elen + 2);
+
+				if (elen >= 5 && pos[3] == 2) {
+					/* OUI Type 2 - WMM IE */
+					if (pos[4] == 0) {
+						elems->wmm_info = pos;
+						elems->wmm_info_len = elen;
+					} else if (pos[4] == 1) {
+						elems->wmm_param = pos;
+						elems->wmm_param_len = elen;
+					}
+				}
+			}
+			break;
+		case WLAN_EID_RSN:
+			elems->rsn = pos;
+			elems->rsn_len = elen;
+			break;
+		case WLAN_EID_ERP_INFO:
+			if (elen >= 1)
+				elems->erp_info = pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_EXT_SUPP_RATES:
+			elems->ext_supp_rates = pos;
+			elems->ext_supp_rates_len = elen;
+			break;
+		case WLAN_EID_HT_CAPABILITY:
+			if (params->mode < IEEE80211_CONN_MODE_HT)
+				break;
+			if (elen >= sizeof(struct ieee80211_ht_cap))
+				elems->ht_cap_elem = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_HT_OPERATION:
+			if (params->mode < IEEE80211_CONN_MODE_HT)
+				break;
+			if (elen >= sizeof(struct ieee80211_ht_operation))
+				elems->ht_operation = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_VHT_CAPABILITY:
+			if (params->mode < IEEE80211_CONN_MODE_VHT)
+				break;
+			if (elen >= sizeof(struct ieee80211_vht_cap))
+				elems->vht_cap_elem = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_VHT_OPERATION:
+			if (params->mode < IEEE80211_CONN_MODE_VHT)
+				break;
+			if (elen >= sizeof(struct ieee80211_vht_operation)) {
+				elems->vht_operation = (void *)pos;
+				if (calc_crc)
+					crc = crc32_be(crc, pos - 2, elen + 2);
+				break;
+			}
+			elem_parse_failed =
+				IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_OPMODE_NOTIF:
+			if (params->mode < IEEE80211_CONN_MODE_VHT)
+				break;
+			if (elen > 0) {
+				elems->opmode_notif = pos;
+				if (calc_crc)
+					crc = crc32_be(crc, pos - 2, elen + 2);
+				break;
+			}
+			elem_parse_failed =
+				IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_MESH_ID:
+			elems->mesh_id = pos;
+			elems->mesh_id_len = elen;
+			break;
+		case WLAN_EID_MESH_CONFIG:
+			if (elen >= sizeof(struct ieee80211_meshconf_ie))
+				elems->mesh_config = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_PEER_MGMT:
+			elems->peering = pos;
+			elems->peering_len = elen;
+			break;
+		case WLAN_EID_MESH_AWAKE_WINDOW:
+			if (elen >= 2)
+				elems->awake_window = (void *)pos;
+			break;
+		case WLAN_EID_PREQ:
+			if (ieee80211_mesh_preq_size_ok(pos, elen)) {
+				elems->preq = pos;
+				elems->preq_len = elen;
+			} else {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			}
+			break;
+		case WLAN_EID_PREP:
+			if (ieee80211_mesh_prep_size_ok(pos, elen)) {
+				elems->prep = pos;
+				elems->prep_len = elen;
+			} else {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			}
+			break;
+		case WLAN_EID_PERR:
+			if (ieee80211_mesh_perr_size_ok(pos, elen)) {
+				elems->perr = pos;
+				elems->perr_len = elen;
+			} else {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			}
+			break;
+		case WLAN_EID_RANN:
+			if (elen >= sizeof(struct ieee80211_rann_ie))
+				elems->rann = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_CHANNEL_SWITCH:
+			if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->ch_switch_ie = (void *)pos;
+			break;
+		case WLAN_EID_EXT_CHANSWITCH_ANN:
+			if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->ext_chansw_ie = (void *)pos;
+			break;
+		case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
+			if (params->mode < IEEE80211_CONN_MODE_HT)
+				break;
+			if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->sec_chan_offs = (void *)pos;
+			break;
+		case WLAN_EID_CHAN_SWITCH_PARAM:
+			if (elen <
+			    sizeof(*elems->mesh_chansw_params_ie)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->mesh_chansw_params_ie = (void *)pos;
+			break;
+		case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
+			if (params->mode < IEEE80211_CONN_MODE_VHT)
+				break;
+
+			if (params->type != (IEEE80211_FTYPE_MGMT |
+					     IEEE80211_STYPE_ACTION)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_UNEXPECTED_ELEM;
+				break;
+			}
+
+			if (elen < sizeof(*elems->wide_bw_chansw_ie)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->wide_bw_chansw_ie = (void *)pos;
+			break;
+		case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
+			if (params->mode < IEEE80211_CONN_MODE_VHT)
+				break;
+			if (params->type == (IEEE80211_FTYPE_MGMT |
+					     IEEE80211_STYPE_ACTION)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_UNEXPECTED_ELEM;
+				break;
+			}
+			/*
+			 * This is a bit tricky, but as we only care about
+			 * a few elements, parse them out manually.
+			 */
+			subelem = cfg80211_find_elem(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
+						     pos, elen);
+			if (subelem) {
+				if (subelem->datalen >= sizeof(*elems->wide_bw_chansw_ie))
+					elems->wide_bw_chansw_ie =
+						(void *)subelem->data;
+				else
+					elem_parse_failed =
+						IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			}
+
+			if (params->mode < IEEE80211_CONN_MODE_EHT)
+				break;
+
+			subelem = cfg80211_find_ext_elem(WLAN_EID_EXT_BANDWIDTH_INDICATION,
+							 pos, elen);
+			if (subelem) {
+				const void *edata = subelem->data + 1;
+				u8 edatalen = subelem->datalen - 1;
+
+				if (ieee80211_bandwidth_indication_size_ok(edata,
+									   edatalen))
+					elems->bandwidth_indication = edata;
+				else
+					elem_parse_failed =
+						IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			}
+
+			subelem = cfg80211_find_ext_elem(WLAN_EID_TX_POWER_ENVELOPE,
+							 pos, elen);
+			if (subelem)
+				ieee80211_parse_tpe(&elems->csa_tpe,
+						    subelem->data + 1,
+						    subelem->datalen - 1);
+			break;
+		case WLAN_EID_COUNTRY:
+			elems->country_elem = pos;
+			elems->country_elem_len = elen;
+			break;
+		case WLAN_EID_PWR_CONSTRAINT:
+			if (elen != 1) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->pwr_constr_elem = pos;
+			break;
+		case WLAN_EID_CISCO_VENDOR_SPECIFIC:
+			/* Lots of different options exist, but we only care
+			 * about the Dynamic Transmit Power Control element.
+			 * First check for the Cisco OUI, then for the DTPC
+			 * tag (0x00).
+			 */
+			if (elen < 4) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+
+			if (pos[0] != 0x00 || pos[1] != 0x40 ||
+			    pos[2] != 0x96 || pos[3] != 0x00)
+				break;
+
+			if (elen != 6) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+
+			if (calc_crc)
+				crc = crc32_be(crc, pos - 2, elen + 2);
+
+			elems->cisco_dtpc_elem = pos;
+			break;
+		case WLAN_EID_ADDBA_EXT:
+			if (elen < sizeof(struct ieee80211_addba_ext_ie)) {
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+				break;
+			}
+			elems->addba_ext_ie = (void *)pos;
+			break;
+		case WLAN_EID_TIMEOUT_INTERVAL:
+			if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
+				elems->timeout_int = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_BSS_MAX_IDLE_PERIOD:
+			if (elen >= sizeof(*elems->max_idle_period_ie))
+				elems->max_idle_period_ie = (void *)pos;
+			break;
+		case WLAN_EID_RSNX:
+			elems->rsnx = pos;
+			elems->rsnx_len = elen;
+			break;
+		case WLAN_EID_TX_POWER_ENVELOPE:
+			if (params->mode < IEEE80211_CONN_MODE_HE)
+				break;
+			ieee80211_parse_tpe(&elems->tpe, pos, elen);
+			break;
+		case WLAN_EID_EXTENSION:
+			ieee80211_parse_extension_element(calc_crc ?
+								&crc : NULL,
+							  elem, elems_parse,
+							  params);
+			break;
+		case WLAN_EID_S1G_CAPABILITIES:
+			if (params->mode != IEEE80211_CONN_MODE_S1G)
+				break;
+			if (elen >= sizeof(*elems->s1g_capab))
+				elems->s1g_capab = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_S1G_OPERATION:
+			if (params->mode != IEEE80211_CONN_MODE_S1G)
+				break;
+			if (elen == sizeof(*elems->s1g_oper))
+				elems->s1g_oper = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_S1G_BCN_COMPAT:
+			if (params->mode != IEEE80211_CONN_MODE_S1G)
+				break;
+			if (elen == sizeof(*elems->s1g_bcn_compat))
+				elems->s1g_bcn_compat = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		case WLAN_EID_AID_RESPONSE:
+			if (params->mode != IEEE80211_CONN_MODE_S1G)
+				break;
+			if (elen == sizeof(struct ieee80211_aid_response_ie))
+				elems->aid_resp = (void *)pos;
+			else
+				elem_parse_failed =
+					IEEE80211_PARSE_ERR_BAD_ELEM_SIZE;
+			break;
+		default:
+			break;
+		}
+
+		if (elem_parse_failed)
+			elems->parse_error |= elem_parse_failed;
+		else
+			__set_bit(id, seen_elems);
+	}
+
+	if (!for_each_element_completed(elem, params->start, params->len))
+		elems->parse_error |= IEEE80211_PARSE_ERR_INVALID_END;
+
+	return crc;
+}
+
+static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
+					    struct ieee802_11_elems *elems,
+					    struct cfg80211_bss *bss,
+					    u8 *nontransmitted_profile)
+{
+	const struct element *elem, *sub;
+
+	if (!bss || !bss->transmitted_bss)
+		return 0;
+
+	for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
+		if (elem->datalen < 2)
+			continue;
+		if (elem->data[0] < 1 || elem->data[0] > 8)
+			continue;
+
+		for_each_element(sub, elem->data + 1, elem->datalen - 1) {
+			u8 new_bssid[ETH_ALEN];
+			size_t profile_len;
+			const u8 *index;
+
+			if (sub->id != 0 || sub->datalen < 4) {
+				/* not a valid BSS profile */
+				continue;
+			}
+
+			if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
+			    sub->data[1] != 2) {
+				/* The first element of the
+				 * Nontransmitted BSSID Profile is not
+				 * the Nontransmitted BSSID Capability
+				 * element.
+				 */
+				continue;
+			}
+
+			memset(nontransmitted_profile, 0, len);
+			profile_len = cfg80211_merge_profile(start, len,
+							     elem,
+							     sub,
+							     nontransmitted_profile,
+							     len);
+
+			/* found a Nontransmitted BSSID Profile */
+			index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
+						 nontransmitted_profile,
+						 profile_len);
+			if (!index || index[1] < 1 || index[2] == 0) {
+				/* Invalid MBSSID Index element */
+				continue;
+			}
+
+			cfg80211_gen_new_bssid(bss->transmitted_bss->bssid,
+					       elem->data[0],
+					       index[2],
+					       new_bssid);
+			if (ether_addr_equal(new_bssid, bss->bssid)) {
+				elems->bssid_index_len = index[1];
+				elems->bssid_index = (void *)&index[2];
+				return profile_len;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static void
+ieee80211_mle_get_sta_prof(struct ieee80211_elems_parse *elems_parse,
+			   u8 link_id)
+{
+	struct ieee802_11_elems *elems = &elems_parse->elems;
+	const struct ieee80211_multi_link_elem *ml = elems->ml_basic;
+	ssize_t ml_len = elems->ml_basic_len;
+	const struct element *sub;
+
+	for_each_mle_subelement(sub, (u8 *)ml, ml_len) {
+		struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data;
+		ssize_t sta_prof_len;
+		u16 control;
+
+		if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE)
+			continue;
+
+		if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data,
+							  sub->datalen))
+			return;
+
+		control = le16_to_cpu(prof->control);
+
+		if (link_id != u16_get_bits(control,
+					    IEEE80211_MLE_STA_CONTROL_LINK_ID))
+			continue;
+
+		if (!(control & IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE))
+			return;
+
+		/* the sub element can be fragmented */
+		sta_prof_len =
+			cfg80211_defragment_element(sub,
+						    (u8 *)ml, ml_len,
+						    elems_parse->scratch_pos,
+						    elems_parse->scratch +
+							elems_parse->scratch_len -
+							elems_parse->scratch_pos,
+						    IEEE80211_MLE_SUBELEM_FRAGMENT);
+
+		if (sta_prof_len < 0)
+			return;
+
+		elems->prof = (void *)elems_parse->scratch_pos;
+		elems->sta_prof_len = sta_prof_len;
+		elems_parse->scratch_pos += sta_prof_len;
+
+		return;
+	}
+}
+
+static const struct element *
+ieee80211_prep_mle_link_parse(struct ieee80211_elems_parse *elems_parse,
+			      struct ieee80211_elems_parse_params *params,
+			      struct ieee80211_elems_parse_params *sub)
+{
+	struct ieee802_11_elems *elems = &elems_parse->elems;
+	struct ieee80211_mle_per_sta_profile *prof;
+	const struct element *ml_basic_elem = NULL;
+	const struct element *tmp, *ret;
+	ssize_t ml_len;
+	const u8 *end;
+
+	if (params->mode < IEEE80211_CONN_MODE_EHT)
+		return NULL;
+
+	for_each_element_extid(tmp, WLAN_EID_EXT_EHT_MULTI_LINK,
+			       elems->ie_start, elems->total_len) {
+		const struct ieee80211_multi_link_elem *mle =
+			(void *)tmp->data + 1;
+
+		if (!ieee80211_mle_size_ok(tmp->data + 1, tmp->datalen - 1))
+			continue;
+
+		if (le16_get_bits(mle->control, IEEE80211_ML_CONTROL_TYPE) !=
+		    IEEE80211_ML_CONTROL_TYPE_BASIC)
+			continue;
+
+		ml_basic_elem = tmp;
+		break;
+	}
+
+	ml_len = cfg80211_defragment_element(ml_basic_elem, elems->ie_start,
+					     elems->total_len,
+					     elems_parse->scratch_pos,
+					     elems_parse->scratch +
+						elems_parse->scratch_len -
+						elems_parse->scratch_pos,
+					     WLAN_EID_FRAGMENT);
+
+	if (ml_len < 0)
+		return NULL;
+
+	elems->ml_basic = (const void *)elems_parse->scratch_pos;
+	elems->ml_basic_len = ml_len;
+	elems_parse->scratch_pos += ml_len;
+
+	if (params->link_id == -1)
+		return NULL;
+
+	ieee80211_mle_get_sta_prof(elems_parse, params->link_id);
+	prof = elems->prof;
+
+	if (!prof)
+		return NULL;
+
+	/* check if we have the 4 bytes for the fixed part in assoc response */
+	if (elems->sta_prof_len < sizeof(*prof) + prof->sta_info_len - 1 + 4) {
+		elems->prof = NULL;
+		elems->sta_prof_len = 0;
+		return NULL;
+	}
+
+	/*
+	 * Skip the capability information and the status code that are expected
+	 * as part of the station profile in association response frames. Note
+	 * the -1 is because the 'sta_info_len' is accounted to as part of the
+	 * per-STA profile, but not part of the 'u8 variable[]' portion.
+	 */
+	sub->start = prof->variable + prof->sta_info_len - 1 + 4;
+	end = (const u8 *)prof + elems->sta_prof_len;
+	sub->len = end - sub->start;
+
+	sub->mode = params->mode;
+	sub->type = params->type;
+	sub->from_ap = params->from_ap;
+	sub->link_id = -1;
+
+	ret = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
+				     sub->start, sub->len);
+	if (ret)
+		return ret;
+
+	/*
+	 * Since we know we want and found a profile, apply an empty
+	 * non-inheritance if the profile didn't have one, so that any
+	 * element that shouldn't be inherited by spec isn't.
+	 */
+	return (const void *)empty_non_inheritance;
+}
+
+static const void *
+ieee80211_mle_defrag(struct ieee80211_elems_parse *elems_parse,
+		     struct ieee80211_elem_defrag *defrag,
+		     size_t *out_len)
+{
+	const void *ret;
+	ssize_t ml_len;
+
+	ml_len = cfg80211_defragment_element(defrag->elem,
+					     defrag->start, defrag->len,
+					     elems_parse->scratch_pos,
+					     elems_parse->scratch +
+						elems_parse->scratch_len -
+						elems_parse->scratch_pos,
+					     WLAN_EID_FRAGMENT);
+	if (ml_len < 0)
+		return NULL;
+	ret = elems_parse->scratch_pos;
+	*out_len = ml_len;
+	elems_parse->scratch_pos += ml_len;
+	return ret;
+}
+
+struct ieee802_11_elems *
+ieee802_11_parse_elems_full(struct ieee80211_elems_parse_params *params)
+{
+	struct ieee80211_elems_parse_params sub = {};
+	struct ieee80211_elems_parse *elems_parse;
+	const struct element *non_inherit = NULL;
+	struct ieee802_11_elems *elems;
+	size_t scratch_len = 3 * params->len;
+	bool inside_multilink = false;
+
+	BUILD_BUG_ON(sizeof(empty_non_inheritance) != empty_non_inheritance[1] + 2);
+	BUILD_BUG_ON(offsetof(typeof(*elems_parse), elems) != 0);
+
+	/* cannot parse for both a specific link and non-transmitted BSS */
+	if (WARN_ON(params->link_id >= 0 && params->bss))
+		return NULL;
+
+	elems_parse = kzalloc_flex(*elems_parse, scratch, scratch_len,
+				   GFP_ATOMIC);
+	if (!elems_parse)
+		return NULL;
+
+	elems_parse->elems.frame_type = params->type;
+	elems_parse->elems.from_ap = params->from_ap;
+
+	elems_parse->scratch_len = scratch_len;
+	elems_parse->scratch_pos = elems_parse->scratch;
+
+	elems = &elems_parse->elems;
+	elems->ie_start = params->start;
+	elems->total_len = params->len;
+
+	/* set all TPE entries to unlimited (but invalid) */
+	ieee80211_clear_tpe(&elems->tpe);
+	ieee80211_clear_tpe(&elems->csa_tpe);
+
+	/*
+	 * If we're looking for a non-transmitted BSS then we cannot at
+	 * the same time be looking for a second link as the two can only
+	 * appear in the same frame carrying info for different BSSes.
+	 *
+	 * In any case, we only look for one at a time, as encoded by
+	 * the WARN_ON above.
+	 */
+	if (params->bss) {
+		int nontx_len =
+			ieee802_11_find_bssid_profile(params->start,
+						      params->len,
+						      elems, params->bss,
+						      elems_parse->scratch_pos);
+		sub.start = elems_parse->scratch_pos;
+		sub.mode = params->mode;
+		sub.len = nontx_len;
+		sub.type = params->type;
+		sub.link_id = params->link_id;
+
+		/* indicate to consumer whether or not profile was found */
+		if (params->bss->transmitted_bss && !nontx_len)
+			elems->mbssid_nontx_profile_missing = true;
+
+		/* consume the space used for non-transmitted profile */
+		elems_parse->scratch_pos += nontx_len;
+
+		non_inherit = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
+						     sub.start, nontx_len);
+		/*
+		 * If it's a non-transmitted BSS, we shouldn't pick
+		 * any elements in the outer parsing that shouldn't
+		 * be inherited. If the profile has a non-inheritance
+		 * element this automatically happens, but if not then
+		 * provide an empty one so that the hard-coded elements
+		 * in cfg80211_is_element_inherited() are ignored, but
+		 * it must be called.
+		 */
+		if (params->bss->transmitted_bss && !non_inherit)
+			non_inherit = (const void *)empty_non_inheritance;
+	} else {
+		/*
+		 * Find the multi-link element and the non-inherit element inside
+		 * the applicable profile, if requested by params->link_id >= 0.
+		 */
+		non_inherit = ieee80211_prep_mle_link_parse(elems_parse, params,
+							    &sub);
+		inside_multilink = true;
+	}
+
+	elems_parse->skip_vendor =
+		cfg80211_find_elem(WLAN_EID_VENDOR_SPECIFIC,
+				   sub.start, sub.len);
+	elems->crc = _ieee802_11_parse_elems_full(params, elems_parse,
+						  non_inherit);
+
+	/* Override with nontransmitted/per-STA profile if found */
+	if (sub.len) {
+		elems_parse->inside_multilink = inside_multilink;
+		elems_parse->skip_vendor = false;
+		_ieee802_11_parse_elems_full(&sub, elems_parse, NULL);
+	}
+
+	elems->ml_reconf = ieee80211_mle_defrag(elems_parse,
+						&elems_parse->ml_reconf,
+						&elems->ml_reconf_len);
+	elems->ml_epcs = ieee80211_mle_defrag(elems_parse,
+					      &elems_parse->ml_epcs,
+					      &elems->ml_epcs_len);
+	if (!elems->ml_basic)
+		elems->ml_basic = ieee80211_mle_defrag(elems_parse,
+						       &elems_parse->ml_basic,
+						       &elems->ml_basic_len);
+
+	if (elems->tim && !elems->parse_error) {
+		const struct ieee80211_tim_ie *tim_ie = elems->tim;
+
+		elems->dtim_period = tim_ie->dtim_period;
+		elems->dtim_count = tim_ie->dtim_count;
+	}
+
+	/* Override DTIM period and count if needed */
+	if (elems->bssid_index &&
+	    elems->bssid_index_len >=
+	    offsetofend(struct ieee80211_bssid_index, dtim_period))
+		elems->dtim_period = elems->bssid_index->dtim_period;
+
+	if (elems->bssid_index &&
+	    elems->bssid_index_len >=
+	    offsetofend(struct ieee80211_bssid_index, dtim_count))
+		elems->dtim_count = elems->bssid_index->dtim_count;
+
+	return elems;
+}
+EXPORT_SYMBOL_IF_KUNIT(ieee802_11_parse_elems_full);
+
+int ieee80211_parse_bitrates(const struct ieee80211_supported_band *sband,
+			     const u8 *srates, int srates_len, u32 *rates)
+{
+	struct ieee80211_rate *br;
+	int brate, rate, i, j, count = 0;
+
+	*rates = 0;
+
+	for (i = 0; i < srates_len; i++) {
+		rate = srates[i] & 0x7f;
+
+		for (j = 0; j < sband->n_bitrates; j++) {
+			br = &sband->bitrates[j];
+
+			brate = DIV_ROUND_UP(br->bitrate, 5);
+			if (brate == rate) {
+				*rates |= BIT(j);
+				count++;
+				break;
+			}
+		}
+	}
+	return count;
+}