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linux/net/mac80211
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Dmitry Antipov 9d301de12d wifi: mac80211: use two-phase skb reclamation in ieee80211_do_stop() 
Since '__dev_queue_xmit()' should be called with interrupts enabled,
the following backtrace:

ieee80211_do_stop()
 ...
 spin_lock_irqsave(&local->queue_stop_reason_lock, flags)
 ...
 ieee80211_free_txskb()
  ieee80211_report_used_skb()
   ieee80211_report_ack_skb()
    cfg80211_mgmt_tx_status_ext()
     nl80211_frame_tx_status()
      genlmsg_multicast_netns()
       genlmsg_multicast_netns_filtered()
        nlmsg_multicast_filtered()
	 netlink_broadcast_filtered()
	  do_one_broadcast()
	   netlink_broadcast_deliver()
	    __netlink_sendskb()
	     netlink_deliver_tap()
	      __netlink_deliver_tap_skb()
	       dev_queue_xmit()
	        __dev_queue_xmit() ; with IRQS disabled
 ...
 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags)

issues the warning (as reported by syzbot reproducer):

WARNING: CPU: 2 PID: 5128 at kernel/softirq.c:362 __local_bh_enable_ip+0xc3/0x120

Fix this by implementing a two-phase skb reclamation in
'ieee80211_do_stop()', where actual work is performed
outside of a section with interrupts disabled.

Fixes: 5061b0c2b9 ("mac80211: cooperate more with network namespaces")
Reported-by: syzbot+1a3986bbd3169c307819@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=1a3986bbd3169c307819
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Link: https://patch.msgid.link/20240906123151.351647-1-dmantipov@yandex.ru
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2024-09-09 11:45:06 +02:00
..
tests wifi: mac80211: pass parsed TPE data to drivers 2024-05-23 10:35:04 +02:00
aead_api.c mac80211: Check crypto_aead_encrypt for errors 2021-03-16 21:20:41 +01:00
aead_api.h
aes_ccm.h
aes_cmac.c mac80211: aes_cmac: check crypto_shash_setkey() return value 2021-04-19 12:01:40 +02:00
aes_cmac.h
aes_gcm.h
aes_gmac.c mac80211: Check crypto_aead_encrypt for errors 2021-03-16 21:20:41 +01:00
aes_gmac.h
agg-rx.c wifi: mac80211: refactor block ack management code 2024-08-27 10:12:50 +02:00
agg-tx.c wifi: mac80211: refactor block ack management code 2024-08-27 10:12:50 +02:00
airtime.c wifi: mac80211: introduce EHT rate support in AQL airtime 2024-09-06 12:58:36 +02:00
cfg.c wifi: cfg80211/mac80211: use proper link ID for DFS 2024-09-06 13:01:05 +02:00
chan.c wifi: mac80211: handle ieee80211_radar_detected() for MLO 2024-09-06 13:01:05 +02:00
debug.h wifi: mac80211: fix mlme_link_id_dbg() 2024-03-25 15:22:53 +01:00
debugfs_key.c wifi: mac80211: remove key_mtx 2023-09-11 11:27:22 +02:00
debugfs_key.h
debugfs_netdev.c wifi: mac80211: fix driver debugfs for vif type change 2024-02-02 13:09:55 +01:00
debugfs_netdev.h wifi: mac80211: fix driver debugfs for vif type change 2024-02-02 13:09:55 +01:00
debugfs_sta.c wifi: mac80211: fix spelling typo in comment 2024-01-03 15:34:56 +01:00
debugfs_sta.h wifi: mac80211: add API to show the link STAs in debugfs 2022-10-07 15:23:41 +02:00
debugfs.c wifi: mac80211: remove DEAUTH_NEED_MGD_TX_PREP 2024-06-28 09:56:30 +02:00
debugfs.h
driver-ops.c Highlights this time are: 2024-06-27 13:53:43 -07:00
driver-ops.h wifi: mac80211: inform the low level if drv_stop() is a suspend 2024-06-26 10:25:46 +02:00
drop.h wifi: mac80211: improve drop for action frame return 2024-03-25 15:39:28 +01:00
eht.c wifi: mac80211: add helpers to access sband iftype data 2023-06-14 11:57:29 +02:00
ethtool.c wifi: mac80211: ethtool: always hold wiphy mutex 2023-09-25 09:00:39 +02:00
fils_aead.c wifi: mac80211: Do not include crypto/algapi.h 2023-08-24 08:42:36 +02:00
fils_aead.h
he.c wifi: mac80211: correctly parse Spatial Reuse Parameter Set element 2024-05-29 15:35:12 +02:00
ht.c wifi: mac80211: refactor block ack management code 2024-08-27 10:12:50 +02:00
ibss.c wifi: mac80211: extend ifcomb check functions for multi-radio 2024-07-09 11:36:12 +02:00
ieee80211_i.h wifi: mac80211: handle ieee80211_radar_detected() for MLO 2024-09-06 13:01:05 +02:00
iface.c wifi: mac80211: use two-phase skb reclamation in ieee80211_do_stop() 2024-09-09 11:45:06 +02:00
Kconfig wifi: cfg80211/mac80211: remove dependency on non-existing option 2024-01-18 14:50:01 +01:00
key.c wifi: mac80211: add link id to ieee80211_gtk_rekey_add() 2024-03-04 14:31:28 +01:00
key.h wifi: mac80211: remove key_mtx 2023-09-11 11:27:22 +02:00
led.c leds: Change led_trigger_blink[_oneshot]() delay parameters to pass-by-value 2023-05-25 12:16:27 +01:00
led.h leds: Change led_trigger_blink[_oneshot]() delay parameters to pass-by-value 2023-05-25 12:16:27 +01:00
link.c wifi: mac80211: handle DFS per link 2024-09-06 13:01:05 +02:00
main.c wifi: mac80211: use kmemdup_array instead of kmemdup for multiple allocation 2024-08-27 10:28:56 +02:00
Makefile wifi: mac80211: move element parsing to a new file 2024-02-08 15:00:43 +01:00
mesh_hwmp.c wifi: mac80211: Replace ENOTSUPP with EOPNOTSUPP 2023-12-12 10:37:01 +01:00
mesh_pathtbl.c wifi: mac80211: remove redundant unlikely() around IS_ERR() 2024-08-27 10:28:55 +02:00
mesh_plink.c wifi: mac80211: simplify adding supported rates 2024-02-08 15:00:43 +01:00
mesh_ps.c wifi: mac80211: mesh: fix some kdoc warnings 2023-10-23 11:43:27 +02:00
mesh_sync.c wifi: mac80211: mesh: fix some kdoc warnings 2023-10-23 11:43:27 +02:00
mesh.c wifi: mac80211: restrict public action ECSA frame handling 2024-06-26 10:21:44 +02:00
mesh.h wifi: mac80211: split mesh fast tx cache into local/proxied/forwarded 2024-04-17 09:21:32 +02:00
michael.c
michael.h
mlme.c wifi: cfg80211/mac80211: use proper link ID for DFS 2024-09-06 13:01:05 +02:00
ocb.c wifi: mac80211: flush only stations using requests links 2024-02-12 21:13:57 +01:00
offchannel.c wifi: mac80211: don't use rate mask for offchannel TX either 2024-08-27 10:13:23 +02:00
parse.c wifi: mac80211: correct EHT EIRP TPE parsing 2024-06-12 12:25:54 +02:00
pm.c wifi: mac80211: handle ieee80211_radar_detected() for MLO 2024-09-06 13:01:05 +02:00
rate.c wifi: mac80211: don't use rate mask for offchannel TX either 2024-08-27 10:13:23 +02:00
rate.h wifi: mac80211: make ieee80211_check_rate_mask() link-aware 2022-07-15 11:43:21 +02:00
rc80211_minstrel_ht_debugfs.c mac80211: minstrel_ht: show sampling rates in debugfs 2021-02-12 08:58:11 +01:00
rc80211_minstrel_ht.c wifi: mac80211: remove shifted rate support 2023-09-13 11:22:16 +02:00
rc80211_minstrel_ht.h wifi: mac80211: minstrel_ht: remove unused has_mrr member from struct minstrel_priv 2022-10-07 15:25:05 +02:00
rx.c wifi: mac80211: do not check BSS color collision in certain cases 2024-07-08 18:28:47 +02:00
s1g.c wifi: mac80211: remove sta_mtx 2023-09-11 11:27:22 +02:00
scan.c wifi: cfg80211/mac80211: use proper link ID for DFS 2024-09-06 13:01:05 +02:00
spectmgmt.c wifi: mac80211: fix AP chandef capturing in CSA 2024-07-10 12:35:58 +02:00
sta_info.c wifi: mac80211: Fix deadlock in ieee80211_sta_ps_deliver_wakeup() 2024-05-29 15:19:55 +02:00
sta_info.h wifi: mac80211: add ieee80211_tdls_sta_link_id() 2024-06-26 10:22:04 +02:00
status.c wifi: mac80211: export ieee80211_purge_tx_queue() for drivers 2024-08-27 10:28:55 +02:00
tdls.c wifi: mac80211: remove TDLS peers only on affected link 2024-03-04 14:34:03 +01:00
tkip.c
tkip.h
trace_msg.h wifi: mac80211: remove unused MAX_MSG_LEN define 2024-02-08 12:50:09 +01:00
trace.c
trace.h wifi: mac80211: inform the low level if drv_stop() is a suspend 2024-06-26 10:25:46 +02:00
tx.c wireless-next patches for v6.12 2024-09-04 17:20:14 -07:00
util.c wifi: mac80211: handle ieee80211_radar_detected() for MLO 2024-09-06 13:01:05 +02:00
vht.c wifi: mac80211: optionally pass chandef to ieee80211_sta_cur_vht_bw() 2024-06-26 10:21:54 +02:00
wbrf.c wifi: mac80211: Drop WBRF debugging statements 2024-01-26 10:43:33 +01:00
wep.c wifi: mac80211: remove RX_DROP_UNUSABLE 2023-09-26 09:16:42 +02:00
wep.h
wme.c wifi: mac80211: fix qos on mesh interfaces 2023-03-22 13:46:38 +01:00
wme.h wifi: mac80211: Drop support for TX push path 2022-10-10 11:06:14 +02:00
wpa.c wifi: mac80211: extend IEEE80211_KEY_FLAG_GENERATE_MMIE to other ciphers 2024-04-08 20:52:28 +02:00
wpa.h wifi: mac80211: remove cipher scheme support 2022-06-10 15:35:53 +02:00