From: Antonio Quartulli <antonio@xxxxxxxxxxxxx>
Userspace applications may be listening for events (e.g.
matching mgmt frame) on a given interface. If such interface
is deleted they would keep hanging because no event will be
delivered anymore.
Send a CMD_INTERFACE event on NETDEV_UNREGISTER to notify
userspace that the interface does not exist anymore.
Signed-off-by: Antonio Quartulli <antonio@xxxxxxxxxxxxx>
---
net/wireless/Module.symvers | 118 ++++++++++++++++++++++++++++++++++++++++++++
net/wireless/core.c | 2 +
net/wireless/nl80211.c | 31 ++++++++++++
net/wireless/nl80211.h | 3 ++
4 files changed, 154 insertions(+)
create mode 100644 net/wireless/Module.symvers
diff --git a/net/wireless/Module.symvers b/net/wireless/Module.symvers
new file mode 100644
index 0000000..a5a553e
--- /dev/null
+++ b/net/wireless/Module.symvers
@@ -0,0 +1,118 @@
+0xdbdf43bc cfg80211_send_rx_assoc net/wireless/cfg80211 EXPORT_SYMBOL
+0xaf87fb7b cfg80211_wext_siwscan net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0x265d8ee4 cfg80211_wext_giwscan net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0x38b8991e cfg80211_ch_switch_notify /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x9d488fc0 cfg80211_notify_new_peer_candidate /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x19e03378 cfg80211_get_p2p_attr /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x082e7b4f cfg80211_wext_siwrts net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0x41424204 cfg80211_wext_giwrts net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0xc60b8679 ieee80211_data_from_8023 /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xa6ec8f1a cfg80211_sched_scan_results /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x5cd60887 ieee80211_get_hdrlen_from_skb /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x90e3fd5f cfg80211_chandef_usable /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x7ef39823 ieee80211_hdrlen /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x7269516e cfg80211_unlink_bss /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xa1425906 ieee80211_channel_to_frequency /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x1bbbbe3d cfg80211_put_bss /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x2d0f99e5 print_ssid net/wireless/lib80211 EXPORT_SYMBOL
+0x1210f5a4 cfg80211_wext_giwretry net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0x23788f04 cfg80211_remain_on_channel_expired /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x2dbaca91 lib80211_register_crypto_ops net/wireless/lib80211 EXPORT_SYMBOL
+0x7fe1a403 cfg80211_find_ie /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x415fccb2 cfg80211_tx_mlme_mgmt /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x21313351 cfg80211_rx_mlme_mgmt /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x019824c5 cfg80211_cqm_txe_notify /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x739212bb lib80211_crypt_info_free net/wireless/lib80211 EXPORT_SYMBOL
+0x09c64fbd ieee80211_frequency_to_channel /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x36840579 cfg80211_ref_bss /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x4d206e0d lib80211_crypt_info_init net/wireless/lib80211 EXPORT_SYMBOL
+0x2cdb3e94 cfg80211_wext_siwfrag net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0xcd9ccab5 cfg80211_wext_giwfrag net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0x60dc3c86 cfg80211_conn_failed /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xbc55da77 cfg80211_rx_spurious_frame /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xe3167eca ieee80211_mandatory_rates /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xfed4d591 cfg80211_find_vendor_ie /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x8a0718ed cfg80211_crit_proto_stopped /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x791666c2 cfg80211_ready_on_channel /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x9efe8fd7 lib80211_unregister_crypto_ops net/wireless/lib80211 EXPORT_SYMBOL
+0x16d11cd3 cfg80211_classify8021d /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x31bef516 cfg80211_cac_event /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x61b0b2ab wiphy_register /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xd9076365 cfg80211_cqm_rssi_notify /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x571a7306 wiphy_rfkill_set_hw_state /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xa63bce9a cfg80211_connect_result /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xfccb88dd cfg80211_roamed /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x2a71a173 cfg80211_check_station_change /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xad0c2d5c cfg80211_assoc_timeout /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x66485480 wiphy_free /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x284cbccf cfg80211_rx_mgmt /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x982e6b6d ieee80211_radiotap_iterator_init /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x001501f0 cfg80211_ibss_joined /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x7fbadd74 cfg80211_send_disassoc net/wireless/cfg80211 EXPORT_SYMBOL
+0x45cd2a29 cfg80211_tdls_oper_request /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xc15c8611 cfg80211_chandef_create /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x6eb977c9 cfg80211_send_deauth net/wireless/cfg80211 EXPORT_SYMBOL
+0xc849536e cfg80211_roamed_bss /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x9832a501 wiphy_rfkill_stop_polling /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x1b383ef0 cfg80211_testmode_event net/wireless/cfg80211 EXPORT_SYMBOL
+0x50641d9e cfg80211_del_sta /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x4c3b5878 ieee80211_get_response_rate /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x820ce81d cfg80211_cqm_pktloss_notify /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x8d27445a cfg80211_ibss_sta net/wireless/cfg80211 EXPORT_SYMBOL
+0xb57a24df cfg80211_sched_scan_stopped /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x52a73bc0 cfg80211_get_bss /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x6cec0a2f cfg80211_gtk_rekey_notify /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xc288a696 cfg80211_probe_status /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xee42db3c cfg80211_chandef_compatible /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xcf618a57 cfg80211_calculate_bitrate /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x204e246e cfg80211_send_unprot_disassoc net/wireless/cfg80211 EXPORT_SYMBOL
+0x4e62865c cfg80211_get_mesh net/wireless/cfg80211 EXPORT_SYMBOL
+0x63650102 cfg80211_testmode_alloc_event_skb net/wireless/cfg80211 EXPORT_SYMBOL
+0xea7be2e1 cfg80211_testmode_alloc_reply_skb net/wireless/cfg80211 EXPORT_SYMBOL
+0xe70700d0 cfg80211_can_beacon_sec_chan net/wireless/cfg80211 EXPORT_SYMBOL
+0x42d38a77 ieee80211_amsdu_to_8023s /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xcd93fd1a cfg80211_new_sta /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x1879fcbd bridge_tunnel_header /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xe681668b wiphy_unregister /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xd45ebd75 cfg80211_send_assoc_timeout net/wireless/cfg80211 EXPORT_SYMBOL
+0x0e6e34e9 __cfg80211_send_disassoc net/wireless/cfg80211 EXPORT_SYMBOL
+0x7883ce71 cfg80211_auth_timeout /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x31298721 cfg80211_inform_bss_frame /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x40e6c9cc __ieee80211_get_channel /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x6d7e6008 cfg80211_send_rx_auth net/wireless/cfg80211 EXPORT_SYMBOL
+0x09fea8c4 cfg80211_disconnected /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x0c4b05f6 cfg80211_ft_event /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x0ea7420f cfg80211_unregister_wdev /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xf236d7e9 cfg80211_report_obss_beacon /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xe7413011 cfg80211_scan_done /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xfc0943bb cfg80211_radar_event /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x61bde271 cfg80211_rx_unprot_mlme_mgmt /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x406a8302 cfg80211_chandef_valid /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x6d6cb9ad ieee80211_operating_class_to_band /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xb274f591 __cfg80211_send_deauth net/wireless/cfg80211 EXPORT_SYMBOL
+0x69b18f43 rfc1042_header /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x72e8e699 cfg80211_wext_giwrange net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0xfa6f9e08 cfg80211_pmksa_candidate_notify /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xa197b1ff ieee80211_get_mesh_hdrlen /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xf07a40f4 lib80211_get_crypto_ops net/wireless/lib80211 EXPORT_SYMBOL
+0x7f41d59b cfg80211_mgmt_tx_status /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x08758a2e freq_reg_info /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x7e07d929 cfg80211_testmode_reply net/wireless/cfg80211 EXPORT_SYMBOL
+0xc63f1b81 ieee80211_radiotap_iterator_next /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xfd8576ae wiphy_new /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x92c0c538 ieee80211_bss_get_ie /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xcb490c18 cfg80211_send_unprot_deauth net/wireless/cfg80211 EXPORT_SYMBOL
+0xb368893f cfg80211_inform_bss /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x5229b0bc ieee80211_data_to_8023 /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x63066fb0 cfg80211_wext_giwname net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0xfb598113 cfg80211_wext_siwmode net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0x73067d35 cfg80211_wext_giwmode net/wireless/cfg80211 EXPORT_SYMBOL_GPL
+0x8f0272b8 cfg80211_send_auth_timeout net/wireless/cfg80211 EXPORT_SYMBOL
+0xc4439a18 wiphy_rfkill_start_polling /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x70648cd8 regulatory_hint /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xfb4ed400 wiphy_apply_custom_regulatory /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x2270c84d cfg80211_rx_assoc_resp /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xc3bf9629 cfg80211_rx_unexpected_4addr_frame /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x35066dc8 cfg80211_michael_mic_failure /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0xbcceeb1e cfg80211_reg_can_beacon /home/ordex/exp/mac80211/net/wireless/cfg80211 EXPORT_SYMBOL
+0x4209768c lib80211_crypt_delayed_deinit net/wireless/lib80211 EXPORT_SYMBOL
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 389a3f2..ae4c148 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -913,6 +913,8 @@ static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
}
break;
case NETDEV_UNREGISTER:
+ nl80211_send_del_iface(rdev, dev, GFP_KERNEL);
+
/*
* It is possible to get NETDEV_UNREGISTER
* multiple times. To detect that, check
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f7cb121..61be4ea 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -10022,6 +10022,37 @@ void nl80211_send_disconnected(struct cfg80211_registered_device *rdev,
}
+void nl80211_send_del_iface(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, gfp_t gfp)
+{
+ struct sk_buff *msg;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
+ if (!msg)
+ return;
+
+ hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_DEL_INTERFACE);
+ if (!hdr) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
+ nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+ nl80211_mlme_mcgrp.id, gfp);
+ return;
+
+ nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+ nlmsg_free(msg);
+}
+
void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *bssid,
gfp_t gfp)
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 44341bf..6071557 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -59,6 +59,9 @@ nl80211_send_beacon_hint_event(struct wiphy *wiphy,
struct ieee80211_channel *channel_before,
struct ieee80211_channel *channel_after);
+void nl80211_send_del_iface(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev, gfp_t gfp);
+
void nl80211_send_ibss_bssid(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *bssid,
gfp_t gfp);
--
1.8.1.5
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