From 14b8da6ba3b04b23a1b999bed93ddb9c09b3c0bc Mon Sep 17 00:00:00 2001 From: Patrick Walther Date: Tue, 18 Oct 2022 11:50:35 +0200 Subject: [PATCH] FIX: [mac80211] backport security fixes This mainly affects scanning and beacon parsing, especially with MBSSID enabled Fixes: CVE-2022-41674 Fixes: CVE-2022-42719 Fixes: CVE-2022-42720 Fixes: CVE-2022-42721 Fixes: CVE-2022-42722 patches taken from https://github.com/openwrt/openwrt/commit/26f400210d6b3780fcc0deb89b9741837df9c8b8 BugzId: 81746 (cherry picked from commit 303cf4aa33d80b5185017046f5259e01439a043c) --- ...kport-of-subsys-patches-from-openwrt.patch | 1660 ++++++++++++++++- 1 file changed, 1604 insertions(+), 56 deletions(-) diff --git a/recipes-kernel/mac80211/mac80211/0002-backport-of-subsys-patches-from-openwrt.patch b/recipes-kernel/mac80211/mac80211/0002-backport-of-subsys-patches-from-openwrt.patch index 8237145..91de576 100644 --- a/recipes-kernel/mac80211/mac80211/0002-backport-of-subsys-patches-from-openwrt.patch +++ b/recipes-kernel/mac80211/mac80211/0002-backport-of-subsys-patches-from-openwrt.patch @@ -1,43 +1,13 @@ -From af9497b64852209f0f7980eaeede4cae9a741942 Mon Sep 17 00:00:00 2001 -From: Patrick Walther -Date: Wed, 14 Sep 2022 14:25:55 +0200 -Subject: [PATCH] backport of subsys patches from openwrt +commit ccac50514f793a8a52e9ab6734b6ff0029b1dda4 +Author: Patrick Walther +Date: Wed Sep 14 14:25:55 2022 +0200 ---- - drivers/net/wireless/mac80211_hwsim.c | 27 +- - include/net/cfg80211.h | 89 +++- - include/net/mac80211.h | 47 +- - include/uapi/linux/nl80211.h | 100 +++- - net/mac80211/cfg.c | 231 +++++++-- - net/mac80211/debugfs.c | 102 ++-- - net/mac80211/debugfs_netdev.c | 32 +- - net/mac80211/debugfs_sta.c | 24 +- - net/mac80211/driver-ops.h | 24 + - net/mac80211/ieee80211_i.h | 210 ++------- - net/mac80211/iface.c | 99 +++- - net/mac80211/main.c | 39 +- - net/mac80211/rc80211_minstrel_ht.c | 75 +-- - net/mac80211/rc80211_minstrel_ht.h | 2 +- - net/mac80211/rx.c | 53 ++- - net/mac80211/sta_info.c | 79 ++-- - net/mac80211/sta_info.h | 12 +- - net/mac80211/status.c | 19 - - net/mac80211/trace.h | 9 + - net/mac80211/tx.c | 644 ++++++++++++-------------- - net/mac80211/util.c | 3 + - net/wireless/chan.c | 16 + - net/wireless/core.c | 23 +- - net/wireless/core.h | 16 + - net/wireless/mlme.c | 153 +++++- - net/wireless/nl80211.c | 260 ++++++++++- - net/wireless/rdev-ops.h | 17 + - net/wireless/sysfs.c | 27 +- - net/wireless/trace.h | 30 +- - 30 files changed, 1581 insertions(+), 907 deletions(-) - delete mode 100644 backport-include/linux/of_net.h + backport of subsys patches from openwrt + + %% original patch: 0002-backport-of-subsys-patches-from-openwrt.patch diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c -index bfc2b1f..79a00c2 100644 +index bfc2b1f..ea0749c 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -3004,15 +3004,19 @@ static void mac80211_hwsim_he_capab(struct ieee80211_supported_band *sband) @@ -101,6 +71,15 @@ index bfc2b1f..79a00c2 100644 } /* By default all radios belong to the first group */ +@@ -3747,6 +3760,8 @@ static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2, + + rx_status.band = channel->band; + rx_status.rate_idx = nla_get_u32(info->attrs[HWSIM_ATTR_RX_RATE]); ++ if (rx_status.rate_idx >= data2->hw->wiphy->bands[rx_status.band]->n_bitrates) ++ goto out; + rx_status.signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]); + + hdr = (void *)skb->data; diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 30c9ebd..ab83553 100644 --- a/include/net/cfg80211.h @@ -292,7 +271,7 @@ index 30c9ebd..ab83553 100644 /** * cfg80211_gtk_rekey_notify - notify userspace about driver rekeying diff --git a/include/net/mac80211.h b/include/net/mac80211.h -index a331431..c85050f 100644 +index a331431..4c2760d 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -1566,6 +1566,7 @@ enum ieee80211_smps_mode { @@ -576,6 +555,43 @@ index c2efea9..019f065 100644 +}; + #endif /* __LINUX_NL80211_H */ +diff --git a/net/mac80211/agg-rx.c b/net/mac80211/agg-rx.c +index ef729b1..7d2925b 100644 +--- a/net/mac80211/agg-rx.c ++++ b/net/mac80211/agg-rx.c +@@ -478,7 +478,7 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, + size_t len) + { + u16 capab, tid, timeout, ba_policy, buf_size, start_seq_num; +- struct ieee802_11_elems elems = { }; ++ struct ieee802_11_elems *elems = NULL; + u8 dialog_token; + int ies_len; + +@@ -496,16 +496,18 @@ void ieee80211_process_addba_request(struct ieee80211_local *local, + ies_len = len - offsetof(struct ieee80211_mgmt, + u.action.u.addba_req.variable); + if (ies_len) { +- ieee802_11_parse_elems(mgmt->u.action.u.addba_req.variable, +- ies_len, true, &elems, mgmt->bssid, NULL); +- if (elems.parse_error) +- return; ++ elems = ieee802_11_parse_elems(mgmt->u.action.u.addba_req.variable, ++ ies_len, true, mgmt->bssid, NULL); ++ if (!elems || elems->parse_error) ++ goto free; + } + + __ieee80211_start_rx_ba_session(sta, dialog_token, timeout, + start_seq_num, ba_policy, tid, + buf_size, true, false, +- elems.addba_ext_ie); ++ elems ? elems->addba_ext_ie : NULL); ++free: ++ kfree(elems); + } + + void ieee80211_manage_rx_ba_offl(struct ieee80211_vif *vif, diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index 1de989c..abe7318 100644 --- a/net/mac80211/cfg.c @@ -1259,7 +1275,7 @@ index 8be28cf..afac8d4 100644 } diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h -index 912c75d..2df420b 100644 +index 912c75d..bd1e46e 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -1486,4 +1486,28 @@ static inline void drv_twt_teardown_request(struct ieee80211_local *local, @@ -1291,8 +1307,82 @@ index 912c75d..2df420b 100644 +#endif + #endif /* __MAC80211_DRIVER_OPS */ +diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c +index 5d6ca4c..0416c4d 100644 +--- a/net/mac80211/ibss.c ++++ b/net/mac80211/ibss.c +@@ -9,7 +9,7 @@ + * Copyright 2009, Johannes Berg + * Copyright 2013-2014 Intel Mobile Communications GmbH + * Copyright(c) 2016 Intel Deutschland GmbH +- * Copyright(c) 2018-2020 Intel Corporation ++ * Copyright(c) 2018-2021 Intel Corporation + */ + + #include +@@ -1589,7 +1589,7 @@ void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, + struct ieee80211_rx_status *rx_status) + { + size_t baselen; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + + BUILD_BUG_ON(offsetof(typeof(mgmt->u.probe_resp), variable) != + offsetof(typeof(mgmt->u.beacon), variable)); +@@ -1602,10 +1602,14 @@ void ieee80211_rx_mgmt_probe_beacon(struct ieee80211_sub_if_data *sdata, + if (baselen > len) + return; + +- ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, +- false, &elems, mgmt->bssid, NULL); ++ elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, ++ len - baselen, false, ++ mgmt->bssid, NULL); + +- ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems); ++ if (elems) { ++ ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, elems); ++ kfree(elems); ++ } + } + + void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, +@@ -1614,7 +1618,7 @@ void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, + struct ieee80211_rx_status *rx_status; + struct ieee80211_mgmt *mgmt; + u16 fc; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + int ies_len; + + rx_status = IEEE80211_SKB_RXCB(skb); +@@ -1651,15 +1655,16 @@ void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, + if (ies_len < 0) + break; + +- ieee802_11_parse_elems( ++ elems = ieee802_11_parse_elems( + mgmt->u.action.u.chan_switch.variable, +- ies_len, true, &elems, mgmt->bssid, NULL); +- +- if (elems.parse_error) +- break; +- +- ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, skb->len, +- rx_status, &elems); ++ ies_len, true, mgmt->bssid, NULL); ++ ++ if (elems && !elems->parse_error) ++ ieee80211_rx_mgmt_spectrum_mgmt(sdata, mgmt, ++ skb->len, ++ rx_status, ++ elems); ++ kfree(elems); + break; + } + } diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h -index 5e9b0af..0d697af 100644 +index 5e9b0af..6edabd8 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -83,6 +83,15 @@ extern const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS]; @@ -1319,7 +1409,21 @@ index 5e9b0af..0d697af 100644 struct rcu_head rcu_head; }; -@@ -862,16 +872,20 @@ enum txq_info_flags { +@@ -635,10 +645,9 @@ struct ieee80211_if_ocb { + */ + struct ieee802_11_elems; + struct ieee80211_mesh_sync_ops { +- void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata, +- u16 stype, +- struct ieee80211_mgmt *mgmt, +- struct ieee802_11_elems *elems, ++ void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata, u16 stype, ++ struct ieee80211_mgmt *mgmt, unsigned int len, ++ const struct ieee80211_meshconf_ie *mesh_cfg, + struct ieee80211_rx_status *rx_status); + + /* should be called with beacon_data under RCU read lock */ +@@ -862,16 +871,20 @@ enum txq_info_flags { * @def_flow: used as a fallback flow when a packet destined to @tin hashes to * a fq_flow which is already owned by a different tin * @def_cvars: codel vars for @def_flow @@ -1342,7 +1446,7 @@ index 5e9b0af..0d697af 100644 unsigned long flags; /* keep last! */ -@@ -948,8 +962,6 @@ struct ieee80211_sub_if_data { +@@ -948,8 +961,6 @@ struct ieee80211_sub_if_data { struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS]; struct mac80211_qos_map __rcu *qos_map; @@ -1351,7 +1455,7 @@ index 5e9b0af..0d697af 100644 struct work_struct csa_finalize_work; bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */ struct cfg80211_chan_def csa_chandef; -@@ -1083,6 +1095,20 @@ ieee80211_vif_get_shift(struct ieee80211_vif *vif) +@@ -1083,6 +1094,20 @@ ieee80211_vif_get_shift(struct ieee80211_vif *vif) return shift; } @@ -1372,7 +1476,7 @@ index 5e9b0af..0d697af 100644 enum { IEEE80211_RX_MSG = 1, IEEE80211_TX_STATUS_MSG = 2, -@@ -1170,44 +1196,6 @@ enum mac80211_scan_state { +@@ -1170,44 +1195,6 @@ enum mac80211_scan_state { SCAN_ABORT, }; @@ -1417,7 +1521,7 @@ index 5e9b0af..0d697af 100644 DECLARE_STATIC_KEY_FALSE(aql_disable); struct ieee80211_local { -@@ -1221,10 +1209,16 @@ struct ieee80211_local { +@@ -1221,10 +1208,16 @@ struct ieee80211_local { struct codel_params cparams; /* protects active_txqs and txqi->schedule_order */ @@ -1435,7 +1539,7 @@ index 5e9b0af..0d697af 100644 const struct ieee80211_ops *ops; -@@ -1454,6 +1448,7 @@ struct ieee80211_local { +@@ -1454,6 +1447,7 @@ struct ieee80211_local { int dynamic_ps_forced_timeout; int user_power_level; /* in dBm, for all interfaces */ @@ -1443,7 +1547,7 @@ index 5e9b0af..0d697af 100644 enum ieee80211_smps_mode smps_mode; -@@ -1490,7 +1485,7 @@ struct ieee80211_local { +@@ -1490,7 +1484,7 @@ struct ieee80211_local { }; static inline struct ieee80211_sub_if_data * @@ -1452,7 +1556,46 @@ index 5e9b0af..0d697af 100644 { return netdev_priv(dev); } -@@ -1639,125 +1634,6 @@ static inline bool txq_has_queue(struct ieee80211_txq *txq) +@@ -1537,6 +1531,7 @@ struct ieee80211_csa_ie { + struct ieee802_11_elems { + const u8 *ie_start; + size_t total_len; ++ u32 crc; + + /* pointers to IEs */ + const struct ieee80211_tdls_lnkie *lnk_id; +@@ -1546,7 +1541,6 @@ struct ieee802_11_elems { + const u8 *supp_rates; + const u8 *ds_params; + const struct ieee80211_tim_ie *tim; +- const u8 *challenge; + const u8 *rsn; + const u8 *rsnx; + const u8 *erp_info; +@@ -1600,7 +1594,6 @@ struct ieee802_11_elems { + u8 ssid_len; + u8 supp_rates_len; + u8 tim_len; +- u8 challenge_len; + u8 rsn_len; + u8 rsnx_len; + u8 ext_supp_rates_len; +@@ -1619,6 +1612,14 @@ struct ieee802_11_elems { + + /* whether a parse error occurred while retrieving these elements */ + bool parse_error; ++ ++ /* ++ * 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[]; + }; + + static inline struct ieee80211_local *hw_to_local( +@@ -1639,125 +1640,6 @@ static inline bool txq_has_queue(struct ieee80211_txq *txq) return !(skb_queue_empty(&txqi->frags) && !txqi->tin.backlog_packets); } @@ -1578,7 +1721,7 @@ index 5e9b0af..0d697af 100644 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr) { return ether_addr_equal(raddr, addr) || -@@ -2003,14 +1879,6 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, +@@ -2003,14 +1885,6 @@ int ieee80211_tx_control_port(struct wiphy *wiphy, struct net_device *dev, u64 *cookie); int ieee80211_probe_mesh_link(struct wiphy *wiphy, struct net_device *dev, const u8 *buf, size_t len); @@ -1593,8 +1736,38 @@ index 5e9b0af..0d697af 100644 /* HT */ void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, +@@ -2223,18 +2097,18 @@ static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata, + ieee80211_tx_skb_tid(sdata, skb, 7); + } + +-u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, +- struct ieee802_11_elems *elems, +- u64 filter, u32 crc, u8 *transmitter_bssid, +- u8 *bss_bssid); +-static inline void ieee802_11_parse_elems(const u8 *start, size_t len, +- bool action, +- struct ieee802_11_elems *elems, +- u8 *transmitter_bssid, +- u8 *bss_bssid) ++struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len, ++ bool action, ++ u64 filter, u32 crc, ++ const u8 *transmitter_bssid, ++ const u8 *bss_bssid); ++static inline struct ieee802_11_elems * ++ieee802_11_parse_elems(const u8 *start, size_t len, bool action, ++ const u8 *transmitter_bssid, ++ const u8 *bss_bssid) + { +- ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0, +- transmitter_bssid, bss_bssid); ++ return ieee802_11_parse_elems_crc(start, len, action, 0, 0, ++ transmitter_bssid, bss_bssid); + } + + diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c -index b6dc214..b777921 100644 +index b6dc214..dede578 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -378,6 +378,7 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_do @@ -1860,6 +2033,842 @@ index 397d289..09e5bf1 100644 unregister_inet6addr_notifier(&local->ifa6_notifier); #endif +diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c +index 42bd81a..6847fdf 100644 +--- a/net/mac80211/mesh.c ++++ b/net/mac80211/mesh.c +@@ -1247,7 +1247,7 @@ ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, + struct sk_buff *presp; + struct beacon_data *bcn; + struct ieee80211_mgmt *hdr; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + size_t baselen; + u8 *pos; + +@@ -1256,22 +1256,24 @@ ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, + if (baselen > len) + return; + +- ieee802_11_parse_elems(pos, len - baselen, false, &elems, mgmt->bssid, +- NULL); +- +- if (!elems.mesh_id) ++ elems = ieee802_11_parse_elems(pos, len - baselen, false, mgmt->bssid, ++ NULL); ++ if (!elems) + return; + ++ if (!elems->mesh_id) ++ goto free; ++ + /* 802.11-2012 10.1.4.3.2 */ + if ((!ether_addr_equal(mgmt->da, sdata->vif.addr) && + !is_broadcast_ether_addr(mgmt->da)) || +- elems.ssid_len != 0) +- return; ++ elems->ssid_len != 0) ++ goto free; + +- if (elems.mesh_id_len != 0 && +- (elems.mesh_id_len != ifmsh->mesh_id_len || +- memcmp(elems.mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) +- return; ++ if (elems->mesh_id_len != 0 && ++ (elems->mesh_id_len != ifmsh->mesh_id_len || ++ memcmp(elems->mesh_id, ifmsh->mesh_id, ifmsh->mesh_id_len))) ++ goto free; + + rcu_read_lock(); + bcn = rcu_dereference(ifmsh->beacon); +@@ -1295,6 +1297,8 @@ ieee80211_mesh_rx_probe_req(struct ieee80211_sub_if_data *sdata, + ieee80211_tx_skb(sdata, presp); + out: + rcu_read_unlock(); ++free: ++ kfree(elems); + } + + static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, +@@ -1305,7 +1309,7 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, + { + struct ieee80211_local *local = sdata->local; + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + struct ieee80211_channel *channel; + size_t baselen; + int freq; +@@ -1320,42 +1324,47 @@ static void ieee80211_mesh_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, + if (baselen > len) + return; + +- ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen, +- false, &elems, mgmt->bssid, NULL); ++ elems = ieee802_11_parse_elems(mgmt->u.probe_resp.variable, ++ len - baselen, ++ false, mgmt->bssid, NULL); ++ if (!elems) ++ return; + + /* ignore non-mesh or secure / unsecure mismatch */ +- if ((!elems.mesh_id || !elems.mesh_config) || +- (elems.rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || +- (!elems.rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) +- return; ++ if ((!elems->mesh_id || !elems->mesh_config) || ++ (elems->rsn && sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) || ++ (!elems->rsn && sdata->u.mesh.security != IEEE80211_MESH_SEC_NONE)) ++ goto free; + +- if (elems.ds_params) +- freq = ieee80211_channel_to_frequency(elems.ds_params[0], band); ++ if (elems->ds_params) ++ freq = ieee80211_channel_to_frequency(elems->ds_params[0], band); + else + freq = rx_status->freq; + + channel = ieee80211_get_channel(local->hw.wiphy, freq); + + if (!channel || channel->flags & IEEE80211_CHAN_DISABLED) +- return; ++ goto free; + +- if (mesh_matches_local(sdata, &elems)) { ++ if (mesh_matches_local(sdata, elems)) { + mpl_dbg(sdata, "rssi_threshold=%d,rx_status->signal=%d\n", + sdata->u.mesh.mshcfg.rssi_threshold, rx_status->signal); + if (!sdata->u.mesh.user_mpm || + sdata->u.mesh.mshcfg.rssi_threshold == 0 || + sdata->u.mesh.mshcfg.rssi_threshold < rx_status->signal) +- mesh_neighbour_update(sdata, mgmt->sa, &elems, ++ mesh_neighbour_update(sdata, mgmt->sa, elems, + rx_status); + + if (ifmsh->csa_role != IEEE80211_MESH_CSA_ROLE_INIT && + !sdata->vif.csa_active) +- ieee80211_mesh_process_chnswitch(sdata, &elems, true); ++ ieee80211_mesh_process_chnswitch(sdata, elems, true); + } + + if (ifmsh->sync_ops) +- ifmsh->sync_ops->rx_bcn_presp(sdata, +- stype, mgmt, &elems, rx_status); ++ ifmsh->sync_ops->rx_bcn_presp(sdata, stype, mgmt, len, ++ elems->mesh_config, rx_status); ++free: ++ kfree(elems); + } + + int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata) +@@ -1447,7 +1456,7 @@ static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, + struct ieee80211_mgmt *mgmt, size_t len) + { + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + u16 pre_value; + bool fwd_csa = true; + size_t baselen; +@@ -1460,33 +1469,37 @@ static void mesh_rx_csa_frame(struct ieee80211_sub_if_data *sdata, + pos = mgmt->u.action.u.chan_switch.variable; + baselen = offsetof(struct ieee80211_mgmt, + u.action.u.chan_switch.variable); +- ieee802_11_parse_elems(pos, len - baselen, true, &elems, +- mgmt->bssid, NULL); +- +- if (!mesh_matches_local(sdata, &elems)) ++ elems = ieee802_11_parse_elems(pos, len - baselen, true, ++ mgmt->bssid, NULL); ++ if (!elems) + return; + +- ifmsh->chsw_ttl = elems.mesh_chansw_params_ie->mesh_ttl; ++ if (!mesh_matches_local(sdata, elems)) ++ goto free; ++ ++ ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; + if (!--ifmsh->chsw_ttl) + fwd_csa = false; + +- pre_value = le16_to_cpu(elems.mesh_chansw_params_ie->mesh_pre_value); ++ pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); + if (ifmsh->pre_value >= pre_value) +- return; ++ goto free; + + ifmsh->pre_value = pre_value; + + if (!sdata->vif.csa_active && +- !ieee80211_mesh_process_chnswitch(sdata, &elems, false)) { ++ !ieee80211_mesh_process_chnswitch(sdata, elems, false)) { + mcsa_dbg(sdata, "Failed to process CSA action frame"); +- return; ++ goto free; + } + + /* forward or re-broadcast the CSA frame */ + if (fwd_csa) { +- if (mesh_fwd_csa_frame(sdata, mgmt, len, &elems) < 0) ++ if (mesh_fwd_csa_frame(sdata, mgmt, len, elems) < 0) + mcsa_dbg(sdata, "Failed to forward the CSA frame"); + } ++free: ++ kfree(elems); + } + + static void ieee80211_mesh_rx_mgmt_action(struct ieee80211_sub_if_data *sdata, +diff --git a/net/mac80211/mesh_hwmp.c b/net/mac80211/mesh_hwmp.c +index a05b615..44a6fdb 100644 +--- a/net/mac80211/mesh_hwmp.c ++++ b/net/mac80211/mesh_hwmp.c +@@ -1,7 +1,7 @@ + // SPDX-License-Identifier: GPL-2.0-only + /* + * Copyright (c) 2008, 2009 open80211s Ltd. +- * Copyright (C) 2019 Intel Corporation ++ * Copyright (C) 2019, 2021 Intel Corporation + * Author: Luis Carlos Cobo + */ + +@@ -908,7 +908,7 @@ static void hwmp_rann_frame_process(struct ieee80211_sub_if_data *sdata, + void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata, + struct ieee80211_mgmt *mgmt, size_t len) + { +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + size_t baselen; + u32 path_metric; + struct sta_info *sta; +@@ -926,37 +926,41 @@ void mesh_rx_path_sel_frame(struct ieee80211_sub_if_data *sdata, + rcu_read_unlock(); + + baselen = (u8 *) mgmt->u.action.u.mesh_action.variable - (u8 *) mgmt; +- ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable, +- len - baselen, false, &elems, mgmt->bssid, NULL); ++ elems = ieee802_11_parse_elems(mgmt->u.action.u.mesh_action.variable, ++ len - baselen, false, mgmt->bssid, NULL); ++ if (!elems) ++ return; + +- if (elems.preq) { +- if (elems.preq_len != 37) ++ if (elems->preq) { ++ if (elems->preq_len != 37) + /* Right now we support just 1 destination and no AE */ +- return; +- path_metric = hwmp_route_info_get(sdata, mgmt, elems.preq, ++ goto free; ++ path_metric = hwmp_route_info_get(sdata, mgmt, elems->preq, + MPATH_PREQ); + if (path_metric) +- hwmp_preq_frame_process(sdata, mgmt, elems.preq, ++ hwmp_preq_frame_process(sdata, mgmt, elems->preq, + path_metric); + } +- if (elems.prep) { +- if (elems.prep_len != 31) ++ if (elems->prep) { ++ if (elems->prep_len != 31) + /* Right now we support no AE */ +- return; +- path_metric = hwmp_route_info_get(sdata, mgmt, elems.prep, ++ goto free; ++ path_metric = hwmp_route_info_get(sdata, mgmt, elems->prep, + MPATH_PREP); + if (path_metric) +- hwmp_prep_frame_process(sdata, mgmt, elems.prep, ++ hwmp_prep_frame_process(sdata, mgmt, elems->prep, + path_metric); + } +- if (elems.perr) { +- if (elems.perr_len != 15) ++ if (elems->perr) { ++ if (elems->perr_len != 15) + /* Right now we support only one destination per PERR */ +- return; +- hwmp_perr_frame_process(sdata, mgmt, elems.perr); ++ goto free; ++ hwmp_perr_frame_process(sdata, mgmt, elems->perr); + } +- if (elems.rann) +- hwmp_rann_frame_process(sdata, mgmt, elems.rann); ++ if (elems->rann) ++ hwmp_rann_frame_process(sdata, mgmt, elems->rann); ++free: ++ kfree(elems); + } + + /** +diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c +index a691584..a829470 100644 +--- a/net/mac80211/mesh_plink.c ++++ b/net/mac80211/mesh_plink.c +@@ -1,7 +1,7 @@ + // SPDX-License-Identifier: GPL-2.0-only + /* + * Copyright (c) 2008, 2009 open80211s Ltd. +- * Copyright (C) 2019 Intel Corporation ++ * Copyright (C) 2019, 2021 Intel Corporation + * Author: Luis Carlos Cobo + */ + #include +@@ -1200,7 +1200,7 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, + struct ieee80211_mgmt *mgmt, size_t len, + struct ieee80211_rx_status *rx_status) + { +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + size_t baselen; + u8 *baseaddr; + +@@ -1228,7 +1228,8 @@ void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, + if (baselen > len) + return; + } +- ieee802_11_parse_elems(baseaddr, len - baselen, true, &elems, +- mgmt->bssid, NULL); +- mesh_process_plink_frame(sdata, mgmt, &elems, rx_status); ++ elems = ieee802_11_parse_elems(baseaddr, len - baselen, true, ++ mgmt->bssid, NULL); ++ mesh_process_plink_frame(sdata, mgmt, elems, rx_status); ++ kfree(elems); + } +diff --git a/net/mac80211/mesh_sync.c b/net/mac80211/mesh_sync.c +index fde93de..9e342cc 100644 +--- a/net/mac80211/mesh_sync.c ++++ b/net/mac80211/mesh_sync.c +@@ -3,6 +3,7 @@ + * Copyright 2011-2012, Pavel Zubarev + * Copyright 2011-2012, Marco Porsch + * Copyright 2011-2012, cozybit Inc. ++ * Copyright (C) 2021 Intel Corporation + */ + + #include "ieee80211_i.h" +@@ -35,12 +36,12 @@ struct sync_method { + /** + * mesh_peer_tbtt_adjusting - check if an mp is currently adjusting its TBTT + * +- * @ie: information elements of a management frame from the mesh peer ++ * @cfg: mesh config element from the mesh peer (or %NULL) + */ +-static bool mesh_peer_tbtt_adjusting(struct ieee802_11_elems *ie) ++static bool mesh_peer_tbtt_adjusting(const struct ieee80211_meshconf_ie *cfg) + { +- return (ie->mesh_config->meshconf_cap & +- IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING) != 0; ++ return cfg && ++ (cfg->meshconf_cap & IEEE80211_MESHCONF_CAPAB_TBTT_ADJUSTING); + } + + void mesh_sync_adjust_tsf(struct ieee80211_sub_if_data *sdata) +@@ -76,11 +77,11 @@ void mesh_sync_adjust_tsf(struct ieee80211_sub_if_data *sdata) + } + } + +-static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, +- u16 stype, +- struct ieee80211_mgmt *mgmt, +- struct ieee802_11_elems *elems, +- struct ieee80211_rx_status *rx_status) ++static void ++mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, u16 stype, ++ struct ieee80211_mgmt *mgmt, unsigned int len, ++ const struct ieee80211_meshconf_ie *mesh_cfg, ++ struct ieee80211_rx_status *rx_status) + { + struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh; + struct ieee80211_local *local = sdata->local; +@@ -101,10 +102,7 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, + */ + if (ieee80211_have_rx_timestamp(rx_status)) + t_r = ieee80211_calculate_rx_timestamp(local, rx_status, +- 24 + 12 + +- elems->total_len + +- FCS_LEN, +- 24); ++ len + FCS_LEN, 24); + else + t_r = drv_get_tsf(local, sdata); + +@@ -119,7 +117,7 @@ static void mesh_sync_offset_rx_bcn_presp(struct ieee80211_sub_if_data *sdata, + * dot11MeshNbrOffsetMaxNeighbor non-peer non-MBSS neighbors + */ + +- if (elems->mesh_config && mesh_peer_tbtt_adjusting(elems)) { ++ if (mesh_peer_tbtt_adjusting(mesh_cfg)) { + msync_dbg(sdata, "STA %pM : is adjusting TBTT\n", + sta->sta.addr); + goto no_sync; +diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c +index 1548f53..cc6d38a 100644 +--- a/net/mac80211/mlme.c ++++ b/net/mac80211/mlme.c +@@ -2889,17 +2889,17 @@ static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, + { + struct ieee80211_local *local = sdata->local; + struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; ++ const struct element *challenge; + u8 *pos; +- struct ieee802_11_elems elems; + u32 tx_flags = 0; + struct ieee80211_prep_tx_info info = { + .subtype = IEEE80211_STYPE_AUTH, + }; + + pos = mgmt->u.auth.variable; +- ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, +- mgmt->bssid, auth_data->bss->bssid); +- if (!elems.challenge) ++ challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, ++ len - (pos - (u8 *)mgmt)); ++ if (!challenge) + return; + auth_data->expected_transaction = 4; + drv_mgd_prepare_tx(sdata->local, sdata, &info); +@@ -2907,7 +2907,8 @@ static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, + tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | + IEEE80211_TX_INTFL_MLME_CONN_TX; + ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, +- elems.challenge - 2, elems.challenge_len + 2, ++ (void *)challenge, ++ challenge->datalen + sizeof(*challenge), + auth_data->bss->bssid, auth_data->bss->bssid, + auth_data->key, auth_data->key_len, + auth_data->key_idx, tx_flags); +@@ -3316,8 +3317,11 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, + aid = 0; /* TODO */ + } + capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); +- ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, elems, +- mgmt->bssid, assoc_data->bss->bssid); ++ elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, ++ mgmt->bssid, assoc_data->bss->bssid); ++ ++ if (!elems) ++ return false; + + if (elems->aid_resp) + aid = le16_to_cpu(elems->aid_resp->aid); +@@ -3339,7 +3343,8 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, + + if (!is_s1g && !elems->supp_rates) { + sdata_info(sdata, "no SuppRates element in AssocResp\n"); +- return false; ++ ret = false; ++ goto out; + } + + sdata->vif.bss_conf.aid = aid; +@@ -3361,7 +3366,7 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, + (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) && + (!elems->vht_cap_elem || !elems->vht_operation)))) { + const struct cfg80211_bss_ies *ies; +- struct ieee802_11_elems bss_elems; ++ struct ieee802_11_elems *bss_elems; + + rcu_read_lock(); + ies = rcu_dereference(cbss->ies); +@@ -3369,16 +3374,22 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, + bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, + GFP_ATOMIC); + rcu_read_unlock(); +- if (!bss_ies) +- return false; ++ if (!bss_ies) { ++ ret = false; ++ goto out; ++ } ++ ++ bss_elems = ieee802_11_parse_elems(bss_ies->data, bss_ies->len, ++ false, mgmt->bssid, ++ assoc_data->bss->bssid); ++ if (!bss_elems) { ++ ret = false; ++ goto out; ++ } + +- ieee802_11_parse_elems(bss_ies->data, bss_ies->len, +- false, &bss_elems, +- mgmt->bssid, +- assoc_data->bss->bssid); + if (assoc_data->wmm && +- !elems->wmm_param && bss_elems.wmm_param) { +- elems->wmm_param = bss_elems.wmm_param; ++ !elems->wmm_param && bss_elems->wmm_param) { ++ elems->wmm_param = bss_elems->wmm_param; + sdata_info(sdata, + "AP bug: WMM param missing from AssocResp\n"); + } +@@ -3387,30 +3398,32 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, + * Also check if we requested HT/VHT, otherwise the AP doesn't + * have to include the IEs in the (re)association response. + */ +- if (!elems->ht_cap_elem && bss_elems.ht_cap_elem && ++ if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && + !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { +- elems->ht_cap_elem = bss_elems.ht_cap_elem; ++ elems->ht_cap_elem = bss_elems->ht_cap_elem; + sdata_info(sdata, + "AP bug: HT capability missing from AssocResp\n"); + } +- if (!elems->ht_operation && bss_elems.ht_operation && ++ if (!elems->ht_operation && bss_elems->ht_operation && + !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) { +- elems->ht_operation = bss_elems.ht_operation; ++ elems->ht_operation = bss_elems->ht_operation; + sdata_info(sdata, + "AP bug: HT operation missing from AssocResp\n"); + } +- if (!elems->vht_cap_elem && bss_elems.vht_cap_elem && ++ if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && + !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { +- elems->vht_cap_elem = bss_elems.vht_cap_elem; ++ elems->vht_cap_elem = bss_elems->vht_cap_elem; + sdata_info(sdata, + "AP bug: VHT capa missing from AssocResp\n"); + } +- if (!elems->vht_operation && bss_elems.vht_operation && ++ if (!elems->vht_operation && bss_elems->vht_operation && + !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) { +- elems->vht_operation = bss_elems.vht_operation; ++ elems->vht_operation = bss_elems->vht_operation; + sdata_info(sdata, + "AP bug: VHT operation missing from AssocResp\n"); + } ++ ++ kfree(bss_elems); + } + + /* +@@ -3661,6 +3674,7 @@ static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, + + ret = true; + out: ++ kfree(elems); + kfree(bss_ies); + return ret; + } +@@ -3672,7 +3686,7 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, + struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; + struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; + u16 capab_info, status_code, aid; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + int ac, uapsd_queues = -1; + u8 *pos; + bool reassoc; +@@ -3729,14 +3743,16 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, + fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) + return; + +- ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, &elems, +- mgmt->bssid, assoc_data->bss->bssid); ++ elems = ieee802_11_parse_elems(pos, len - (pos - (u8 *)mgmt), false, ++ mgmt->bssid, assoc_data->bss->bssid); ++ if (!elems) ++ goto notify_driver; + + if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && +- elems.timeout_int && +- elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { ++ elems->timeout_int && ++ elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { + u32 tu, ms; +- tu = le32_to_cpu(elems.timeout_int->value); ++ tu = le32_to_cpu(elems->timeout_int->value); + ms = tu * 1024 / 1000; + sdata_info(sdata, + "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", +@@ -3756,7 +3772,7 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, + event.u.mlme.reason = status_code; + drv_event_callback(sdata->local, sdata, &event); + } else { +- if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, &elems)) { ++ if (!ieee80211_assoc_success(sdata, cbss, mgmt, len, elems)) { + /* oops -- internal error -- send timeout for now */ + ieee80211_destroy_assoc_data(sdata, false, false); + cfg80211_assoc_timeout(sdata->dev, cbss); +@@ -3786,6 +3802,7 @@ static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, + ifmgd->assoc_req_ies, ifmgd->assoc_req_ies_len); + notify_driver: + drv_mgd_complete_tx(sdata->local, sdata, &info); ++ kfree(elems); + } + + static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata, +@@ -3990,7 +4007,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; + struct ieee80211_mgmt *mgmt = (void *) hdr; + size_t baselen; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + struct ieee80211_local *local = sdata->local; + struct ieee80211_chanctx_conf *chanctx_conf; + struct ieee80211_channel *chan; +@@ -4036,15 +4053,16 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + + if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && + ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->bss)) { +- ieee802_11_parse_elems(variable, +- len - baselen, false, &elems, +- bssid, +- ifmgd->assoc_data->bss->bssid); ++ elems = ieee802_11_parse_elems(variable, len - baselen, false, ++ bssid, ++ ifmgd->assoc_data->bss->bssid); ++ if (!elems) ++ return; + + ieee80211_rx_bss_info(sdata, mgmt, len, rx_status); + +- if (elems.dtim_period) +- ifmgd->dtim_period = elems.dtim_period; ++ if (elems->dtim_period) ++ ifmgd->dtim_period = elems->dtim_period; + ifmgd->have_beacon = true; + ifmgd->assoc_data->need_beacon = false; + if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { +@@ -4052,17 +4070,17 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + le64_to_cpu(mgmt->u.beacon.timestamp); + sdata->vif.bss_conf.sync_device_ts = + rx_status->device_timestamp; +- sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; ++ sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; + } + +- if (elems.mbssid_config_ie) ++ if (elems->mbssid_config_ie) + bss_conf->profile_periodicity = +- elems.mbssid_config_ie->profile_periodicity; ++ elems->mbssid_config_ie->profile_periodicity; + else + bss_conf->profile_periodicity = 0; + +- if (elems.ext_capab_len >= 11 && +- (elems.ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) ++ if (elems->ext_capab_len >= 11 && ++ (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) + bss_conf->ema_ap = true; + else + bss_conf->ema_ap = false; +@@ -4071,6 +4089,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + ifmgd->assoc_data->timeout = jiffies; + ifmgd->assoc_data->timeout_started = true; + run_again(sdata, ifmgd->assoc_data->timeout); ++ kfree(elems); + return; + } + +@@ -4102,13 +4121,15 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + */ + if (!ieee80211_is_s1g_beacon(hdr->frame_control)) + ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); +- ncrc = ieee802_11_parse_elems_crc(variable, +- len - baselen, false, &elems, +- care_about_ies, ncrc, +- mgmt->bssid, bssid); ++ elems = ieee802_11_parse_elems_crc(variable, len - baselen, ++ false, care_about_ies, ncrc, ++ mgmt->bssid, bssid); ++ if (!elems) ++ return; ++ ncrc = elems->crc; + + if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && +- ieee80211_check_tim(elems.tim, elems.tim_len, bss_conf->aid)) { ++ ieee80211_check_tim(elems->tim, elems->tim_len, bss_conf->aid)) { + if (local->hw.conf.dynamic_ps_timeout > 0) { + if (local->hw.conf.flags & IEEE80211_CONF_PS) { + local->hw.conf.flags &= ~IEEE80211_CONF_PS; +@@ -4178,12 +4199,12 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + le64_to_cpu(mgmt->u.beacon.timestamp); + sdata->vif.bss_conf.sync_device_ts = + rx_status->device_timestamp; +- sdata->vif.bss_conf.sync_dtim_count = elems.dtim_count; ++ sdata->vif.bss_conf.sync_dtim_count = elems->dtim_count; + } + + if ((ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid) || + ieee80211_is_s1g_short_beacon(mgmt->frame_control)) +- return; ++ goto free; + ifmgd->beacon_crc = ncrc; + ifmgd->beacon_crc_valid = true; + +@@ -4191,12 +4212,12 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + + ieee80211_sta_process_chanswitch(sdata, rx_status->mactime, + rx_status->device_timestamp, +- &elems, true); ++ elems, true); + + if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && +- ieee80211_sta_wmm_params(local, sdata, elems.wmm_param, +- elems.wmm_param_len, +- elems.mu_edca_param_set)) ++ ieee80211_sta_wmm_params(local, sdata, elems->wmm_param, ++ elems->wmm_param_len, ++ elems->mu_edca_param_set)) + changed |= BSS_CHANGED_QOS; + + /* +@@ -4205,7 +4226,7 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + */ + if (!ifmgd->have_beacon) { + /* a few bogus AP send dtim_period = 0 or no TIM IE */ +- bss_conf->dtim_period = elems.dtim_period ?: 1; ++ bss_conf->dtim_period = elems->dtim_period ?: 1; + + changed |= BSS_CHANGED_BEACON_INFO; + ifmgd->have_beacon = true; +@@ -4217,9 +4238,9 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + ieee80211_recalc_ps_vif(sdata); + } + +- if (elems.erp_info) { ++ if (elems->erp_info) { + erp_valid = true; +- erp_value = elems.erp_info[0]; ++ erp_value = elems->erp_info[0]; + } else { + erp_valid = false; + } +@@ -4232,12 +4253,12 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + mutex_lock(&local->sta_mtx); + sta = sta_info_get(sdata, bssid); + +- changed |= ieee80211_recalc_twt_req(sdata, sta, &elems); ++ changed |= ieee80211_recalc_twt_req(sdata, sta, elems); + +- if (ieee80211_config_bw(sdata, sta, elems.ht_cap_elem, +- elems.vht_cap_elem, elems.ht_operation, +- elems.vht_operation, elems.he_operation, +- elems.s1g_oper, bssid, &changed)) { ++ if (ieee80211_config_bw(sdata, sta, elems->ht_cap_elem, ++ elems->vht_cap_elem, elems->ht_operation, ++ elems->vht_operation, elems->he_operation, ++ elems->s1g_oper, bssid, &changed)) { + mutex_unlock(&local->sta_mtx); + sdata_info(sdata, + "failed to follow AP %pM bandwidth change, disconnect\n", +@@ -4249,21 +4270,23 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata, + sizeof(deauth_buf), true, + WLAN_REASON_DEAUTH_LEAVING, + false); +- return; ++ goto free; + } + +- if (sta && elems.opmode_notif) +- ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif, ++ if (sta && elems->opmode_notif) ++ ieee80211_vht_handle_opmode(sdata, sta, *elems->opmode_notif, + rx_status->band); + mutex_unlock(&local->sta_mtx); + + changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt, +- elems.country_elem, +- elems.country_elem_len, +- elems.pwr_constr_elem, +- elems.cisco_dtpc_elem); ++ elems->country_elem, ++ elems->country_elem_len, ++ elems->pwr_constr_elem, ++ elems->cisco_dtpc_elem); + + ieee80211_bss_info_change_notify(sdata, changed); ++free: ++ kfree(elems); + } + + void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, +@@ -4292,7 +4315,6 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, + struct ieee80211_rx_status *rx_status; + struct ieee80211_mgmt *mgmt; + u16 fc; +- struct ieee802_11_elems elems; + int ies_len; + + rx_status = (struct ieee80211_rx_status *) skb->cb; +@@ -4324,6 +4346,8 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, + break; + case IEEE80211_STYPE_ACTION: + if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { ++ struct ieee802_11_elems *elems; ++ + ies_len = skb->len - + offsetof(struct ieee80211_mgmt, + u.action.u.chan_switch.variable); +@@ -4332,18 +4356,19 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, + break; + + /* CSA IE cannot be overridden, no need for BSSID */ +- ieee802_11_parse_elems( +- mgmt->u.action.u.chan_switch.variable, +- ies_len, true, &elems, mgmt->bssid, NULL); +- +- if (elems.parse_error) +- break; +- +- ieee80211_sta_process_chanswitch(sdata, +- rx_status->mactime, +- rx_status->device_timestamp, +- &elems, false); ++ elems = ieee802_11_parse_elems( ++ mgmt->u.action.u.chan_switch.variable, ++ ies_len, true, mgmt->bssid, NULL); ++ ++ if (elems && !elems->parse_error) ++ ieee80211_sta_process_chanswitch(sdata, ++ rx_status->mactime, ++ rx_status->device_timestamp, ++ elems, false); ++ kfree(elems); + } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { ++ struct ieee802_11_elems *elems; ++ + ies_len = skb->len - + offsetof(struct ieee80211_mgmt, + u.action.u.ext_chan_switch.variable); +@@ -4355,21 +4380,22 @@ void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, + * extended CSA IE can't be overridden, no need for + * BSSID + */ +- ieee802_11_parse_elems( +- mgmt->u.action.u.ext_chan_switch.variable, +- ies_len, true, &elems, mgmt->bssid, NULL); +- +- if (elems.parse_error) +- break; +- +- /* for the handling code pretend this was also an IE */ +- elems.ext_chansw_ie = +- &mgmt->u.action.u.ext_chan_switch.data; ++ elems = ieee802_11_parse_elems( ++ mgmt->u.action.u.ext_chan_switch.variable, ++ ies_len, true, mgmt->bssid, NULL); ++ ++ if (elems && !elems->parse_error) { ++ /* for the handling code pretend it was an IE */ ++ elems->ext_chansw_ie = ++ &mgmt->u.action.u.ext_chan_switch.data; ++ ++ ieee80211_sta_process_chanswitch(sdata, ++ rx_status->mactime, ++ rx_status->device_timestamp, ++ elems, false); ++ } + +- ieee80211_sta_process_chanswitch(sdata, +- rx_status->mactime, +- rx_status->device_timestamp, +- &elems, false); ++ kfree(elems); + } + break; + } diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c index 0e6133c..61ff2ff 100644 --- a/net/mac80211/rc80211_minstrel_ht.c @@ -2019,7 +3028,7 @@ index a5b56e5..dad1403 100644 #define EWMA_LEVEL 96 /* ewma weighting factor [/EWMA_DIV] */ diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c -index 2f34d3d..584e3a2 100644 +index 2f34d3d..91bfceb 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -1583,8 +1583,12 @@ static void sta_ps_start(struct sta_info *sta) @@ -2036,7 +3045,33 @@ index 2f34d3d..584e3a2 100644 if (txq_has_queue(txq)) set_bit(tid, &sta->txq_buffered_tids); -@@ -2948,6 +2952,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) +@@ -1982,10 +1986,11 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) + + if (mmie_keyidx < NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS || + mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS + +- NUM_DEFAULT_BEACON_KEYS) { +- cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, +- skb->data, +- skb->len); ++ NUM_DEFAULT_BEACON_KEYS) { ++ if (rx->sdata->dev) ++ cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, ++ skb->data, ++ skb->len); + return RX_DROP_MONITOR; /* unexpected BIP keyidx */ + } + +@@ -2133,7 +2138,8 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx) + /* either the frame has been decrypted or will be dropped */ + status->flag |= RX_FLAG_DECRYPTED; + +- if (unlikely(ieee80211_is_beacon(fc) && result == RX_DROP_UNUSABLE)) ++ if (unlikely(ieee80211_is_beacon(fc) && result == RX_DROP_UNUSABLE && ++ rx->sdata->dev)) + cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev, + skb->data, skb->len); + +@@ -2948,6 +2954,7 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx) if (!fwd_skb) goto out; @@ -2044,7 +3079,7 @@ index 2f34d3d..584e3a2 100644 fwd_hdr = (struct ieee80211_hdr *) fwd_skb->data; fwd_hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_RETRY); info = IEEE80211_SKB_CB(fwd_skb); -@@ -3175,6 +3180,49 @@ static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, +@@ -3175,6 +3182,49 @@ static void ieee80211_process_sa_query_req(struct ieee80211_sub_if_data *sdata, ieee80211_tx_skb(sdata, skb); } @@ -2094,7 +3129,7 @@ index 2f34d3d..584e3a2 100644 static ieee80211_rx_result debug_noinline ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) { -@@ -3200,6 +3248,9 @@ ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) +@@ -3200,6 +3250,9 @@ ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx) !(rx->flags & IEEE80211_RX_BEACON_REPORTED)) { int sig = 0; @@ -2104,6 +3139,85 @@ index 2f34d3d..584e3a2 100644 if (ieee80211_hw_check(&rx->local->hw, SIGNAL_DBM) && !(status->flag & RX_FLAG_NO_SIGNAL_VAL)) sig = status->signal; +diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c +index 887f945..e692a24 100644 +--- a/net/mac80211/scan.c ++++ b/net/mac80211/scan.c +@@ -9,7 +9,7 @@ + * Copyright 2007, Michael Wu + * Copyright 2013-2015 Intel Mobile Communications GmbH + * Copyright 2016-2017 Intel Deutschland GmbH +- * Copyright (C) 2018-2020 Intel Corporation ++ * Copyright (C) 2018-2021 Intel Corporation + */ + + #include +@@ -155,7 +155,7 @@ ieee80211_bss_info_update(struct ieee80211_local *local, + }; + bool signal_valid; + struct ieee80211_sub_if_data *scan_sdata; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + size_t baselen; + u8 *elements; + +@@ -209,8 +209,10 @@ ieee80211_bss_info_update(struct ieee80211_local *local, + if (baselen > len) + return NULL; + +- ieee802_11_parse_elems(elements, len - baselen, false, &elems, +- mgmt->bssid, cbss->bssid); ++ elems = ieee802_11_parse_elems(elements, len - baselen, false, ++ mgmt->bssid, cbss->bssid); ++ if (!elems) ++ return NULL; + + /* In case the signal is invalid update the status */ + signal_valid = channel == cbss->channel; +@@ -218,15 +220,17 @@ ieee80211_bss_info_update(struct ieee80211_local *local, + rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL; + + bss = (void *)cbss->priv; +- ieee80211_update_bss_from_elems(local, bss, &elems, rx_status, beacon); ++ ieee80211_update_bss_from_elems(local, bss, elems, rx_status, beacon); + + list_for_each_entry(non_tx_cbss, &cbss->nontrans_list, nontrans_list) { + non_tx_bss = (void *)non_tx_cbss->priv; + +- ieee80211_update_bss_from_elems(local, non_tx_bss, &elems, ++ ieee80211_update_bss_from_elems(local, non_tx_bss, elems, + rx_status, beacon); + } + ++ kfree(elems); ++ + return bss; + } + +@@ -461,16 +465,19 @@ static void __ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted) + scan_req = rcu_dereference_protected(local->scan_req, + lockdep_is_held(&local->mtx)); + +- if (scan_req != local->int_scan_req) { +- local->scan_info.aborted = aborted; +- cfg80211_scan_done(scan_req, &local->scan_info); +- } + RCU_INIT_POINTER(local->scan_req, NULL); + RCU_INIT_POINTER(local->scan_sdata, NULL); + + local->scanning = 0; + local->scan_chandef.chan = NULL; + ++ synchronize_rcu(); ++ ++ if (scan_req != local->int_scan_req) { ++ local->scan_info.aborted = aborted; ++ cfg80211_scan_done(scan_req, &local->scan_info); ++ } ++ + /* Set power back to normal operating levels. */ + ieee80211_hw_config(local, 0); + diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index dccaf4b..d67dfdc 100644 --- a/net/mac80211/sta_info.c @@ -2324,8 +3438,177 @@ index ef17d43..97d57cb 100644 } /* SNMP counters +diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c +index 45e532a..137be9e 100644 +--- a/net/mac80211/tdls.c ++++ b/net/mac80211/tdls.c +@@ -6,7 +6,7 @@ + * Copyright 2014, Intel Corporation + * Copyright 2014 Intel Mobile Communications GmbH + * Copyright 2015 - 2016 Intel Deutschland GmbH +- * Copyright (C) 2019 Intel Corporation ++ * Copyright (C) 2019, 2021 Intel Corporation + */ + + #include +@@ -1684,7 +1684,7 @@ ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata, + struct sk_buff *skb) + { + struct ieee80211_local *local = sdata->local; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems = NULL; + struct sta_info *sta; + struct ieee80211_tdls_data *tf = (void *)skb->data; + bool local_initiator; +@@ -1718,16 +1718,20 @@ ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata, + goto call_drv; + } + +- ieee802_11_parse_elems(tf->u.chan_switch_resp.variable, +- skb->len - baselen, false, &elems, +- NULL, NULL); +- if (elems.parse_error) { ++ elems = ieee802_11_parse_elems(tf->u.chan_switch_resp.variable, ++ skb->len - baselen, false, NULL, NULL); ++ if (!elems) { ++ ret = -ENOMEM; ++ goto out; ++ } ++ ++ if (elems->parse_error) { + tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n"); + ret = -EINVAL; + goto out; + } + +- if (!elems.ch_sw_timing || !elems.lnk_id) { ++ if (!elems->ch_sw_timing || !elems->lnk_id) { + tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n"); + ret = -EINVAL; + goto out; +@@ -1735,15 +1739,15 @@ ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata, + + /* validate the initiator is set correctly */ + local_initiator = +- !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); ++ !memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); + if (local_initiator == sta->sta.tdls_initiator) { + tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); + ret = -EINVAL; + goto out; + } + +- params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); +- params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); ++ params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time); ++ params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout); + + params.tmpl_skb = + ieee80211_tdls_ch_sw_resp_tmpl_get(sta, ¶ms.ch_sw_tm_ie); +@@ -1763,6 +1767,7 @@ call_drv: + out: + mutex_unlock(&local->sta_mtx); + dev_kfree_skb_any(params.tmpl_skb); ++ kfree(elems); + return ret; + } + +@@ -1771,7 +1776,7 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, + struct sk_buff *skb) + { + struct ieee80211_local *local = sdata->local; +- struct ieee802_11_elems elems; ++ struct ieee802_11_elems *elems; + struct cfg80211_chan_def chandef; + struct ieee80211_channel *chan; + enum nl80211_channel_type chan_type; +@@ -1831,22 +1836,27 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, + return -EINVAL; + } + +- ieee802_11_parse_elems(tf->u.chan_switch_req.variable, +- skb->len - baselen, false, &elems, NULL, NULL); +- if (elems.parse_error) { ++ elems = ieee802_11_parse_elems(tf->u.chan_switch_req.variable, ++ skb->len - baselen, false, NULL, NULL); ++ if (!elems) ++ return -ENOMEM; ++ ++ if (elems->parse_error) { + tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n"); +- return -EINVAL; ++ ret = -EINVAL; ++ goto free; + } + +- if (!elems.ch_sw_timing || !elems.lnk_id) { ++ if (!elems->ch_sw_timing || !elems->lnk_id) { + tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n"); +- return -EINVAL; ++ ret = -EINVAL; ++ goto free; + } + +- if (!elems.sec_chan_offs) { ++ if (!elems->sec_chan_offs) { + chan_type = NL80211_CHAN_HT20; + } else { +- switch (elems.sec_chan_offs->sec_chan_offs) { ++ switch (elems->sec_chan_offs->sec_chan_offs) { + case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: + chan_type = NL80211_CHAN_HT40PLUS; + break; +@@ -1865,7 +1875,8 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, + if (!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &chandef, + sdata->wdev.iftype)) { + tdls_dbg(sdata, "TDLS chan switch to forbidden channel\n"); +- return -EINVAL; ++ ret = -EINVAL; ++ goto free; + } + + mutex_lock(&local->sta_mtx); +@@ -1881,7 +1892,7 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, + + /* validate the initiator is set correctly */ + local_initiator = +- !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); ++ !memcmp(elems->lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); + if (local_initiator == sta->sta.tdls_initiator) { + tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); + ret = -EINVAL; +@@ -1889,16 +1900,16 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, + } + + /* peer should have known better */ +- if (!sta->sta.ht_cap.ht_supported && elems.sec_chan_offs && +- elems.sec_chan_offs->sec_chan_offs) { ++ if (!sta->sta.ht_cap.ht_supported && elems->sec_chan_offs && ++ elems->sec_chan_offs->sec_chan_offs) { + tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n"); + ret = -ENOTSUPP; + goto out; + } + + params.chandef = &chandef; +- params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); +- params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); ++ params.switch_time = le16_to_cpu(elems->ch_sw_timing->switch_time); ++ params.switch_timeout = le16_to_cpu(elems->ch_sw_timing->switch_timeout); + + params.tmpl_skb = + ieee80211_tdls_ch_sw_resp_tmpl_get(sta, +@@ -1917,6 +1928,8 @@ ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, + out: + mutex_unlock(&local->sta_mtx); + dev_kfree_skb_any(params.tmpl_skb); ++free: ++ kfree(elems); + return ret; + } + diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h -index 9e8381b..bbda9e9 100644 +index 9e8381b..ffa1b7b 100644 --- a/net/mac80211/trace.h +++ b/net/mac80211/trace.h @@ -2892,6 +2892,15 @@ TRACE_EVENT(drv_twt_teardown_request, @@ -3156,7 +4439,7 @@ index 15888e4..50025ff 100644 rcu_read_unlock(); return skb; diff --git a/net/mac80211/util.c b/net/mac80211/util.c -index be1911d..d85a39a 100644 +index be1911d..09a19e6 100644 --- a/net/mac80211/util.c +++ b/net/mac80211/util.c @@ -301,6 +301,9 @@ static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac) @@ -3169,6 +4452,103 @@ index be1911d..d85a39a 100644 if (sdata->vif.type == NL80211_IFTYPE_AP) ps = &sdata->bss->ps; +@@ -1117,10 +1120,6 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, + } else + elem_parse_failed = true; + break; +- case WLAN_EID_CHALLENGE: +- elems->challenge = pos; +- elems->challenge_len = elen; +- break; + case WLAN_EID_VENDOR_SPECIFIC: + if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 && + pos[2] == 0xf2) { +@@ -1400,8 +1399,8 @@ _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, + + static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, + struct ieee802_11_elems *elems, +- u8 *transmitter_bssid, +- u8 *bss_bssid, ++ const u8 *transmitter_bssid, ++ const u8 *bss_bssid, + u8 *nontransmitted_profile) + { + const struct element *elem, *sub; +@@ -1414,6 +1413,8 @@ static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, + 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]; +@@ -1466,31 +1467,36 @@ static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len, + return found ? profile_len : 0; + } + +-u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, +- struct ieee802_11_elems *elems, +- u64 filter, u32 crc, u8 *transmitter_bssid, +- u8 *bss_bssid) ++struct ieee802_11_elems *ieee802_11_parse_elems_crc(const u8 *start, size_t len, ++ bool action, u64 filter, ++ u32 crc, ++ const u8 *transmitter_bssid, ++ const u8 *bss_bssid) + { ++ struct ieee802_11_elems *elems; + const struct element *non_inherit = NULL; + u8 *nontransmitted_profile; + int nontransmitted_profile_len = 0; + +- memset(elems, 0, sizeof(*elems)); ++ elems = kzalloc(sizeof(*elems) + len, GFP_ATOMIC); ++ if (!elems) ++ return NULL; + elems->ie_start = start; + elems->total_len = len; + +- nontransmitted_profile = kmalloc(len, GFP_ATOMIC); +- if (nontransmitted_profile) { +- nontransmitted_profile_len = +- ieee802_11_find_bssid_profile(start, len, elems, +- transmitter_bssid, +- bss_bssid, +- nontransmitted_profile); +- non_inherit = +- cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, +- nontransmitted_profile, +- nontransmitted_profile_len); +- } ++ elems->scratch_len = len; ++ elems->scratch_pos = elems->scratch; ++ ++ nontransmitted_profile = elems->scratch_pos; ++ nontransmitted_profile_len = ++ ieee802_11_find_bssid_profile(start, len, elems, ++ transmitter_bssid, ++ bss_bssid, ++ nontransmitted_profile); ++ non_inherit = ++ cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, ++ nontransmitted_profile, ++ nontransmitted_profile_len); + + crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter, + crc, non_inherit); +@@ -1519,9 +1525,9 @@ u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action, + offsetofend(struct ieee80211_bssid_index, dtim_count)) + elems->dtim_count = elems->bssid_index->dtim_count; + +- kfree(nontransmitted_profile); ++ elems->crc = crc; + +- return crc; ++ return elems; + } + + void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata, diff --git a/net/wireless/chan.c b/net/wireless/chan.c index 1382a5f..5f50ac4 100644 --- a/net/wireless/chan.c @@ -3906,6 +5286,174 @@ index 36422cf..8555468 100644 +} + #endif /* __CFG80211_RDEV_OPS */ +diff --git a/net/wireless/scan.c b/net/wireless/scan.c +index 10ba8ca..43e7cba 100644 +--- a/net/wireless/scan.c ++++ b/net/wireless/scan.c +@@ -143,18 +143,12 @@ static inline void bss_ref_get(struct cfg80211_registered_device *rdev, + lockdep_assert_held(&rdev->bss_lock); + + bss->refcount++; +- if (bss->pub.hidden_beacon_bss) { +- bss = container_of(bss->pub.hidden_beacon_bss, +- struct cfg80211_internal_bss, +- pub); +- bss->refcount++; +- } +- if (bss->pub.transmitted_bss) { +- bss = container_of(bss->pub.transmitted_bss, +- struct cfg80211_internal_bss, +- pub); +- bss->refcount++; +- } ++ ++ if (bss->pub.hidden_beacon_bss) ++ bss_from_pub(bss->pub.hidden_beacon_bss)->refcount++; ++ ++ if (bss->pub.transmitted_bss) ++ bss_from_pub(bss->pub.transmitted_bss)->refcount++; + } + + static inline void bss_ref_put(struct cfg80211_registered_device *rdev, +@@ -304,7 +298,8 @@ static size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen, + tmp_old = cfg80211_find_ie(WLAN_EID_SSID, ie, ielen); + tmp_old = (tmp_old) ? tmp_old + tmp_old[1] + 2 : ie; + +- while (tmp_old + tmp_old[1] + 2 - ie <= ielen) { ++ while (tmp_old + 2 - ie <= ielen && ++ tmp_old + tmp_old[1] + 2 - ie <= ielen) { + if (tmp_old[0] == 0) { + tmp_old++; + continue; +@@ -364,7 +359,8 @@ static size_t cfg80211_gen_new_ie(const u8 *ie, size_t ielen, + * copied to new ie, skip ssid, capability, bssid-index ie + */ + tmp_new = sub_copy; +- while (tmp_new + tmp_new[1] + 2 - sub_copy <= subie_len) { ++ while (tmp_new + 2 - sub_copy <= subie_len && ++ tmp_new + tmp_new[1] + 2 - sub_copy <= subie_len) { + if (!(tmp_new[0] == WLAN_EID_NON_TX_BSSID_CAP || + tmp_new[0] == WLAN_EID_SSID)) { + memcpy(pos, tmp_new, tmp_new[1] + 2); +@@ -429,6 +425,15 @@ cfg80211_add_nontrans_list(struct cfg80211_bss *trans_bss, + + rcu_read_unlock(); + ++ /* ++ * This is a bit weird - it's not on the list, but already on another ++ * one! The only way that could happen is if there's some BSSID/SSID ++ * shared by multiple APs in their multi-BSSID profiles, potentially ++ * with hidden SSID mixed in ... ignore it. ++ */ ++ if (!list_empty(&nontrans_bss->nontrans_list)) ++ return -EINVAL; ++ + /* add to the list */ + list_add_tail(&nontrans_bss->nontrans_list, &trans_bss->nontrans_list); + return 0; +@@ -1604,6 +1609,23 @@ struct cfg80211_non_tx_bss { + u8 bssid_index; + }; + ++static void cfg80211_update_hidden_bsses(struct cfg80211_internal_bss *known, ++ const struct cfg80211_bss_ies *new_ies, ++ const struct cfg80211_bss_ies *old_ies) ++{ ++ struct cfg80211_internal_bss *bss; ++ ++ /* Assign beacon IEs to all sub entries */ ++ list_for_each_entry(bss, &known->hidden_list, hidden_list) { ++ const struct cfg80211_bss_ies *ies; ++ ++ ies = rcu_access_pointer(bss->pub.beacon_ies); ++ WARN_ON(ies != old_ies); ++ ++ rcu_assign_pointer(bss->pub.beacon_ies, new_ies); ++ } ++} ++ + static bool + cfg80211_update_known_bss(struct cfg80211_registered_device *rdev, + struct cfg80211_internal_bss *known, +@@ -1627,7 +1649,6 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev, + kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); + } else if (rcu_access_pointer(new->pub.beacon_ies)) { + const struct cfg80211_bss_ies *old; +- struct cfg80211_internal_bss *bss; + + if (known->pub.hidden_beacon_bss && + !list_empty(&known->hidden_list)) { +@@ -1655,16 +1676,7 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev, + if (old == rcu_access_pointer(known->pub.ies)) + rcu_assign_pointer(known->pub.ies, new->pub.beacon_ies); + +- /* Assign beacon IEs to all sub entries */ +- list_for_each_entry(bss, &known->hidden_list, hidden_list) { +- const struct cfg80211_bss_ies *ies; +- +- ies = rcu_access_pointer(bss->pub.beacon_ies); +- WARN_ON(ies != old); +- +- rcu_assign_pointer(bss->pub.beacon_ies, +- new->pub.beacon_ies); +- } ++ cfg80211_update_hidden_bsses(known, new->pub.beacon_ies, old); + + if (old) + kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); +@@ -1741,6 +1753,8 @@ cfg80211_bss_update(struct cfg80211_registered_device *rdev, + new->refcount = 1; + INIT_LIST_HEAD(&new->hidden_list); + INIT_LIST_HEAD(&new->pub.nontrans_list); ++ /* we'll set this later if it was non-NULL */ ++ new->pub.transmitted_bss = NULL; + + if (rcu_access_pointer(tmp->pub.proberesp_ies)) { + hidden = rb_find_bss(rdev, tmp, BSS_CMP_HIDE_ZLEN); +@@ -1981,10 +1995,15 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy, + spin_lock_bh(&rdev->bss_lock); + if (cfg80211_add_nontrans_list(non_tx_data->tx_bss, + &res->pub)) { +- if (__cfg80211_unlink_bss(rdev, res)) ++ if (__cfg80211_unlink_bss(rdev, res)) { + rdev->bss_generation++; ++ res = NULL; ++ } + } + spin_unlock_bh(&rdev->bss_lock); ++ ++ if (!res) ++ return NULL; + } + + trace_cfg80211_return_bss(&res->pub); +@@ -2103,6 +2122,8 @@ static void cfg80211_parse_mbssid_data(struct wiphy *wiphy, + for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, ie, ielen) { + if (elem->datalen < 4) + continue; ++ if (elem->data[0] < 1 || (int)elem->data[0] > 8) ++ continue; + for_each_element(sub, elem->data + 1, elem->datalen - 1) { + u8 profile_len; + +@@ -2238,7 +2259,7 @@ cfg80211_update_notlisted_nontrans(struct wiphy *wiphy, + size_t new_ie_len; + struct cfg80211_bss_ies *new_ies; + const struct cfg80211_bss_ies *old; +- u8 cpy_len; ++ size_t cpy_len; + + lockdep_assert_held(&wiphy_to_rdev(wiphy)->bss_lock); + +@@ -2305,6 +2326,8 @@ cfg80211_update_notlisted_nontrans(struct wiphy *wiphy, + } else { + old = rcu_access_pointer(nontrans_bss->beacon_ies); + rcu_assign_pointer(nontrans_bss->beacon_ies, new_ies); ++ cfg80211_update_hidden_bsses(bss_from_pub(nontrans_bss), ++ new_ies, old); + rcu_assign_pointer(nontrans_bss->ies, new_ies); + if (old) + kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); diff --git a/net/wireless/sysfs.c b/net/wireless/sysfs.c index 0c3f05c..30c0dcd 100644 --- a/net/wireless/sysfs.c