------------[ cut here ]------------
WARNING: CPU: 0 PID: 55 at net/wireless/scan.c:1666 rb_insert_bss net/wireless/scan.c:1666 [inline]
WARNING: CPU: 0 PID: 55 at net/wireless/scan.c:1666 cfg80211_rehash_bss+0x1e6/0x540 net/wireless/scan.c:1723
Modules linked in:
CPU: 0 UID: 0 PID: 55 Comm: kworker/u4:4 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:rb_insert_bss net/wireless/scan.c:1666 [inline]
RIP: 0010:cfg80211_rehash_bss+0x1e6/0x540 net/wireless/scan.c:1723
Code: e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 33 03 00 00 ff 45 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 cc e5 ae 00 cc 90 <0f> 0b 90 4c 8b 2c 24 4c 89 ef e8 9b 6a 00 fa 84 c0 74 78 e8 72 69
RSP: 0018:ffffc9000102ef20 EFLAGS: 00010246
RAX: ffffffff8a8f1b95 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88801f410000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88803be7dc68 R08: 0000000000000000 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000000 R12: ffff88804df881a0
R13: ffff8880418ae430 R14: dffffc0000000000 R15: ffff8880587ec420
FS:  0000000000000000(0000) GS:ffff88808d969000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00445c000 CR3: 000000001150e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 cfg80211_update_assoc_bss_entry+0x3f6/0x6a0 net/wireless/scan.c:3471
 cfg80211_ch_switch_notify+0x3c1/0x780 net/wireless/nl80211.c:20399
 ieee80211_sta_process_chanswitch+0xad4/0x2870 net/mac80211/mlme.c:-1
 ieee80211_rx_mgmt_beacon+0x19c7/0x2cd0 net/mac80211/mlme.c:7523
 ieee80211_sta_rx_queued_mgmt+0x4ed/0x4470 net/mac80211/mlme.c:8093
 ieee80211_iface_process_skb net/mac80211/iface.c:1696 [inline]
 ieee80211_iface_work+0x652/0x12d0 net/mac80211/iface.c:1753
 cfg80211_wiphy_work+0x2b8/0x470 net/wireless/core.c:435
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>