nl80211: fix check for valid SSID size in scan operations

In both trigger_scan and sched_scan operations, we were checking for
the SSID length before assigning the value correctly.  Since the
memory was just kzalloc'ed, the check was always failing and SSID with
over 32 characters were allowed to go through.

This was causing a buffer overflow when copying the actual SSID to the
proper place.

This bug has been there since 2.6.29-rc4.

Cc: stable@kernel.org
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
	struct nlattr *nl_cmds;
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
	const struct ieee80211_txrx_stypes *mgmt_stypes =
				dev->wiphy.mgmt_stypes;

	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
	if (!hdr)
		return -1;

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));

	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    cfg80211_rdev_list_generation);

	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
		   dev->wiphy.retry_short);
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
		   dev->wiphy.retry_long);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
		    dev->wiphy.frag_threshold);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
		    dev->wiphy.rts_threshold);
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
		    dev->wiphy.coverage_class);
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);

	if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
	if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);

	NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
		sizeof(u32) * dev->wiphy.n_cipher_suites,
		dev->wiphy.cipher_suites);

	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
		   dev->wiphy.max_num_pmkids);

	if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
		NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
		    dev->wiphy.available_antennas_tx);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
		    dev->wiphy.available_antennas_rx);

	if ((dev->wiphy.available_antennas_tx ||
	     dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
		u32 tx_ant = 0, rx_ant = 0;
		int res;
		res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
		if (!res) {
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
		}
	}

	if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
				dev->wiphy.interface_modes))
		goto nla_put_failure;

	nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
	if (!nl_bands)
		goto nla_put_failure;

	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
		if (!dev->wiphy.bands[band])
			continue;

		nl_band = nla_nest_start(msg, band);
		if (!nl_band)
			goto nla_put_failure;

		/* add HT info */
		if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
			NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
				sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
				&dev->wiphy.bands[band]->ht_cap.mcs);
			NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
				dev->wiphy.bands[band]->ht_cap.cap);
			NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
				dev->wiphy.bands[band]->ht_cap.ampdu_factor);
			NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
				dev->wiphy.bands[band]->ht_cap.ampdu_density);
		}

		/* add frequencies */
		nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
		if (!nl_freqs)
			goto nla_put_failure;

		for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
			nl_freq = nla_nest_start(msg, i);
			if (!nl_freq)
				goto nla_put_failure;

			chan = &dev->wiphy.bands[band]->channels[i];

			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;

			nla_nest_end(msg, nl_freq);
		}

		nla_nest_end(msg, nl_freqs);

		/* add bitrates */
		nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
		if (!nl_rates)
			goto nla_put_failure;

		for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
			nl_rate = nla_nest_start(msg, i);
			if (!nl_rate)
				goto nla_put_failure;

			rate = &dev->wiphy.bands[band]->bitrates[i];
			NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
				    rate->bitrate);
			if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
				NLA_PUT_FLAG(msg,
					NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);

			nla_nest_end(msg, nl_rate);
		}

		nla_nest_end(msg, nl_rates);

		nla_nest_end(msg, nl_band);
	}
	nla_nest_end(msg, nl_bands);

	nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
	if (!nl_cmds)
		goto nla_put_failure;

	i = 0;
#define CMD(op, n)						\
	 do {							\
		if (dev->ops->op) {				\
			i++;					\
			NLA_PUT_U32(msg, i, NL80211_CMD_ ## n);	\
		}						\
	} while (0)

	CMD(add_virtual_intf, NEW_INTERFACE);
	CMD(change_virtual_intf, SET_INTERFACE);
	CMD(add_key, NEW_KEY);
	CMD(add_beacon, NEW_BEACON);
	CMD(add_station, NEW_STATION);
	CMD(add_mpath, NEW_MPATH);
	CMD(update_mesh_config, SET_MESH_CONFIG);
	CMD(change_bss, SET_BSS);
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
	CMD(join_ibss, JOIN_IBSS);
	CMD(join_mesh, JOIN_MESH);
	CMD(set_pmksa, SET_PMKSA);
	CMD(del_pmksa, DEL_PMKSA);
	CMD(flush_pmksa, FLUSH_PMKSA);
	CMD(remain_on_channel, REMAIN_ON_CHANNEL);
	CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
	CMD(mgmt_tx, FRAME);
	CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
	if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
	}
	CMD(set_channel, SET_CHANNEL);
	CMD(set_wds_peer, SET_WDS_PEER);
	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
		CMD(sched_scan_start, START_SCHED_SCAN);

#undef CMD

	if (dev->ops->connect || dev->ops->auth) {
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
	}

	if (dev->ops->disconnect || dev->ops->deauth) {
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
	}

	nla_nest_end(msg, nl_cmds);

	if (dev->ops->remain_on_channel)
		NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
			    dev->wiphy.max_remain_on_channel_duration);

	/* for now at least assume all drivers have it */
	if (dev->ops->mgmt_tx)
		NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);

	if (mgmt_stypes) {
		u16 stypes;
		struct nlattr *nl_ftypes, *nl_ifs;
		enum nl80211_iftype ift;

		nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
		if (!nl_ifs)
			goto nla_put_failure;

		for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
			nl_ftypes = nla_nest_start(msg, ift);
			if (!nl_ftypes)
				goto nla_put_failure;
			i = 0;
			stypes = mgmt_stypes[ift].tx;
			while (stypes) {
				if (stypes & 1)
					NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
						    (i << 4) | IEEE80211_FTYPE_MGMT);
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}

		nla_nest_end(msg, nl_ifs);

		nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
		if (!nl_ifs)
			goto nla_put_failure;

		for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
			nl_ftypes = nla_nest_start(msg, ift);
			if (!nl_ftypes)
				goto nla_put_failure;
			i = 0;
			stypes = mgmt_stypes[ift].rx;
			while (stypes) {
				if (stypes & 1)
					NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
						    (i << 4) | IEEE80211_FTYPE_MGMT);
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}
		nla_nest_end(msg, nl_ifs);
	}

	if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
		struct nlattr *nl_wowlan;

		nl_wowlan = nla_nest_start(msg,
				NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
		if (!nl_wowlan)
			goto nla_put_failure;

		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
		if (dev->wiphy.wowlan.n_patterns) {
			struct nl80211_wowlan_pattern_support pat = {
				.max_patterns = dev->wiphy.wowlan.n_patterns,
				.min_pattern_len =
					dev->wiphy.wowlan.pattern_min_len,
				.max_pattern_len =
					dev->wiphy.wowlan.pattern_max_len,
			};
			NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
				sizeof(pat), &pat);
		}

		nla_nest_end(msg, nl_wowlan);
	}

	if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
				dev->wiphy.software_iftypes))
		goto nla_put_failure;

	if (nl80211_put_iface_combinations(&dev->wiphy, msg))
		goto nla_put_failure;

	return genlmsg_end(msg, hdr);

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}

static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
			      struct cfg80211_registered_device *dev)
{
	void *hdr;
	struct nlattr *nl_bands, *nl_band;
	struct nlattr *nl_freqs, *nl_freq;
	struct nlattr *nl_rates, *nl_rate;
	struct nlattr *nl_cmds;
	enum ieee80211_band band;
	struct ieee80211_channel *chan;
	struct ieee80211_rate *rate;
	int i;
	const struct ieee80211_txrx_stypes *mgmt_stypes =
				dev->wiphy.mgmt_stypes;

	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);
	if (!hdr)
		return -1;

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->wiphy_idx);
	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));

	NLA_PUT_U32(msg, NL80211_ATTR_GENERATION,
		    cfg80211_rdev_list_generation);

	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_SHORT,
		   dev->wiphy.retry_short);
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_RETRY_LONG,
		   dev->wiphy.retry_long);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD,
		    dev->wiphy.frag_threshold);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD,
		    dev->wiphy.rts_threshold);
	NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_COVERAGE_CLASS,
		    dev->wiphy.coverage_class);
	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_SCAN_SSIDS,
		   dev->wiphy.max_scan_ssids);
	NLA_PUT_U16(msg, NL80211_ATTR_MAX_SCAN_IE_LEN,
		    dev->wiphy.max_scan_ie_len);

	if (dev->wiphy.flags & WIPHY_FLAG_IBSS_RSN)
		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_IBSS_RSN);
	if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
		NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);

	NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
		sizeof(u32) * dev->wiphy.n_cipher_suites,
		dev->wiphy.cipher_suites);

	NLA_PUT_U8(msg, NL80211_ATTR_MAX_NUM_PMKIDS,
		   dev->wiphy.max_num_pmkids);

	if (dev->wiphy.flags & WIPHY_FLAG_CONTROL_PORT_PROTOCOL)
		NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE);

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_TX,
		    dev->wiphy.available_antennas_tx);
	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_AVAIL_RX,
		    dev->wiphy.available_antennas_rx);

	if ((dev->wiphy.available_antennas_tx ||
	     dev->wiphy.available_antennas_rx) && dev->ops->get_antenna) {
		u32 tx_ant = 0, rx_ant = 0;
		int res;
		res = dev->ops->get_antenna(&dev->wiphy, &tx_ant, &rx_ant);
		if (!res) {
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_TX, tx_ant);
			NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_ANTENNA_RX, rx_ant);
		}
	}

	if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
				dev->wiphy.interface_modes))
		goto nla_put_failure;

	nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);
	if (!nl_bands)
		goto nla_put_failure;

	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
		if (!dev->wiphy.bands[band])
			continue;

		nl_band = nla_nest_start(msg, band);
		if (!nl_band)
			goto nla_put_failure;

		/* add HT info */
		if (dev->wiphy.bands[band]->ht_cap.ht_supported) {
			NLA_PUT(msg, NL80211_BAND_ATTR_HT_MCS_SET,
				sizeof(dev->wiphy.bands[band]->ht_cap.mcs),
				&dev->wiphy.bands[band]->ht_cap.mcs);
			NLA_PUT_U16(msg, NL80211_BAND_ATTR_HT_CAPA,
				dev->wiphy.bands[band]->ht_cap.cap);
			NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_FACTOR,
				dev->wiphy.bands[band]->ht_cap.ampdu_factor);
			NLA_PUT_U8(msg, NL80211_BAND_ATTR_HT_AMPDU_DENSITY,
				dev->wiphy.bands[band]->ht_cap.ampdu_density);
		}

		/* add frequencies */
		nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);
		if (!nl_freqs)
			goto nla_put_failure;

		for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {
			nl_freq = nla_nest_start(msg, i);
			if (!nl_freq)
				goto nla_put_failure;

			chan = &dev->wiphy.bands[band]->channels[i];

			if (nl80211_msg_put_channel(msg, chan))
				goto nla_put_failure;

			nla_nest_end(msg, nl_freq);
		}

		nla_nest_end(msg, nl_freqs);

		/* add bitrates */
		nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);
		if (!nl_rates)
			goto nla_put_failure;

		for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {
			nl_rate = nla_nest_start(msg, i);
			if (!nl_rate)
				goto nla_put_failure;

			rate = &dev->wiphy.bands[band]->bitrates[i];
			NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,
				    rate->bitrate);
			if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)
				NLA_PUT_FLAG(msg,
					NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);

			nla_nest_end(msg, nl_rate);
		}

		nla_nest_end(msg, nl_rates);

		nla_nest_end(msg, nl_band);
	}
	nla_nest_end(msg, nl_bands);

	nl_cmds = nla_nest_start(msg, NL80211_ATTR_SUPPORTED_COMMANDS);
	if (!nl_cmds)
		goto nla_put_failure;

	i = 0;
#define CMD(op, n)						\
	 do {							\
		if (dev->ops->op) {				\
			i++;					\
			NLA_PUT_U32(msg, i, NL80211_CMD_ ## n);	\
		}						\
	} while (0)

	CMD(add_virtual_intf, NEW_INTERFACE);
	CMD(change_virtual_intf, SET_INTERFACE);
	CMD(add_key, NEW_KEY);
	CMD(add_beacon, NEW_BEACON);
	CMD(add_station, NEW_STATION);
	CMD(add_mpath, NEW_MPATH);
	CMD(update_mesh_config, SET_MESH_CONFIG);
	CMD(change_bss, SET_BSS);
	CMD(auth, AUTHENTICATE);
	CMD(assoc, ASSOCIATE);
	CMD(deauth, DEAUTHENTICATE);
	CMD(disassoc, DISASSOCIATE);
	CMD(join_ibss, JOIN_IBSS);
	CMD(join_mesh, JOIN_MESH);
	CMD(set_pmksa, SET_PMKSA);
	CMD(del_pmksa, DEL_PMKSA);
	CMD(flush_pmksa, FLUSH_PMKSA);
	CMD(remain_on_channel, REMAIN_ON_CHANNEL);
	CMD(set_bitrate_mask, SET_TX_BITRATE_MASK);
	CMD(mgmt_tx, FRAME);
	CMD(mgmt_tx_cancel_wait, FRAME_WAIT_CANCEL);
	if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
	}
	CMD(set_channel, SET_CHANNEL);
	CMD(set_wds_peer, SET_WDS_PEER);
	if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_SCHED_SCAN)
		CMD(sched_scan_start, START_SCHED_SCAN);

#undef CMD

	if (dev->ops->connect || dev->ops->auth) {
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_CONNECT);
	}

	if (dev->ops->disconnect || dev->ops->deauth) {
		i++;
		NLA_PUT_U32(msg, i, NL80211_CMD_DISCONNECT);
	}

	nla_nest_end(msg, nl_cmds);

	if (dev->ops->remain_on_channel)
		NLA_PUT_U32(msg, NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION,
			    dev->wiphy.max_remain_on_channel_duration);

	/* for now at least assume all drivers have it */
	if (dev->ops->mgmt_tx)
		NLA_PUT_FLAG(msg, NL80211_ATTR_OFFCHANNEL_TX_OK);

	if (mgmt_stypes) {
		u16 stypes;
		struct nlattr *nl_ftypes, *nl_ifs;
		enum nl80211_iftype ift;

		nl_ifs = nla_nest_start(msg, NL80211_ATTR_TX_FRAME_TYPES);
		if (!nl_ifs)
			goto nla_put_failure;

		for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
			nl_ftypes = nla_nest_start(msg, ift);
			if (!nl_ftypes)
				goto nla_put_failure;
			i = 0;
			stypes = mgmt_stypes[ift].tx;
			while (stypes) {
				if (stypes & 1)
					NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
						    (i << 4) | IEEE80211_FTYPE_MGMT);
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}

		nla_nest_end(msg, nl_ifs);

		nl_ifs = nla_nest_start(msg, NL80211_ATTR_RX_FRAME_TYPES);
		if (!nl_ifs)
			goto nla_put_failure;

		for (ift = 0; ift < NUM_NL80211_IFTYPES; ift++) {
			nl_ftypes = nla_nest_start(msg, ift);
			if (!nl_ftypes)
				goto nla_put_failure;
			i = 0;
			stypes = mgmt_stypes[ift].rx;
			while (stypes) {
				if (stypes & 1)
					NLA_PUT_U16(msg, NL80211_ATTR_FRAME_TYPE,
						    (i << 4) | IEEE80211_FTYPE_MGMT);
				stypes >>= 1;
				i++;
			}
			nla_nest_end(msg, nl_ftypes);
		}
		nla_nest_end(msg, nl_ifs);
	}

	if (dev->wiphy.wowlan.flags || dev->wiphy.wowlan.n_patterns) {
		struct nlattr *nl_wowlan;

		nl_wowlan = nla_nest_start(msg,
				NL80211_ATTR_WOWLAN_TRIGGERS_SUPPORTED);
		if (!nl_wowlan)
			goto nla_put_failure;

		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_ANY)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_ANY);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_DISCONNECT)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_DISCONNECT);
		if (dev->wiphy.wowlan.flags & WIPHY_WOWLAN_MAGIC_PKT)
			NLA_PUT_FLAG(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT);
		if (dev->wiphy.wowlan.n_patterns) {
			struct nl80211_wowlan_pattern_support pat = {
				.max_patterns = dev->wiphy.wowlan.n_patterns,
				.min_pattern_len =
					dev->wiphy.wowlan.pattern_min_len,
				.max_pattern_len =
					dev->wiphy.wowlan.pattern_max_len,
			};
			NLA_PUT(msg, NL80211_WOWLAN_TRIG_PKT_PATTERN,
				sizeof(pat), &pat);
		}

		nla_nest_end(msg, nl_wowlan);
	}

	if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
				dev->wiphy.software_iftypes))
		goto nla_put_failure;

	if (nl80211_put_iface_combinations(&dev->wiphy, msg))
		goto nla_put_failure;

	return genlmsg_end(msg, hdr);

 nla_put_failure:
	genlmsg_cancel(msg, hdr);
	return -EMSGSIZE;
}
