------------[ cut here ]------------
!list_empty(&bss->hidden_list)
WARNING: net/wireless/scan.c:1787 at cfg80211_combine_bsses net/wireless/scan.c:1787 [inline], CPU#1: ksoftirqd/1/28
WARNING: net/wireless/scan.c:1787 at __cfg80211_bss_update+0x1c32/0x23e0 net/wireless/scan.c:2034, CPU#1: ksoftirqd/1/28
Modules linked in:
CPU: 1 UID: 0 PID: 28 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:cfg80211_combine_bsses net/wireless/scan.c:1787 [inline]
RIP: 0010:__cfg80211_bss_update+0x1c32/0x23e0 net/wireless/scan.c:2034
Code: 48 c1 ea 03 80 3c 02 00 0f 85 6a 04 00 00 49 8b 9c 24 88 00 00 00 48 85 db 0f 85 28 fe ff ff e9 66 fe ff ff e8 2f 09 27 f7 90 <0f> 0b 90 4c 89 ff e8 63 4c 1d fa 31 ff 89 c6 88 84 24 80 00 00 00
RSP: 0018:ffffc90000677238 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88803ab07468 RCX: ffffffff8ae1e79a
RDX: ffff88801f284980 RSI: ffffffff8ae1f3f1 RDI: ffff88801f284980
RBP: 0000000000000002 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88803ab07400
R13: dffffc0000000000 R14: ffff88803ab0c000 R15: ffff88803ab0c010
FS:  0000000000000000(0000) GS:ffff8880d6439000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000121f CR3: 0000000038232000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 cfg80211_inform_single_bss_data+0x770/0x1e20 net/wireless/scan.c:2368
 cfg80211_inform_bss_data+0x237/0x3a00 net/wireless/scan.c:3226
 cfg80211_inform_bss_frame_data+0x247/0x790 net/wireless/scan.c:3317
 ieee80211_bss_info_update+0x310/0xab0 net/mac80211/scan.c:230
 ieee80211_scan_rx+0x4e6/0xb60 net/mac80211/scan.c:364
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5305 [inline]
 ieee80211_rx_list+0x1d19/0x2fc0 net/mac80211/rx.c:5588
 ieee80211_rx_napi+0xdc/0x400 net/mac80211/rx.c:5611
 ieee80211_rx include/net/mac80211.h:5267 [inline]
 ieee80211_handle_queued_frames+0xc8/0x120 net/mac80211/main.c:452
 tasklet_action_common+0x2de/0x3d0 kernel/softirq.c:925
 handle_softirqs+0x1eb/0x9e0 kernel/softirq.c:622
 run_ksoftirqd kernel/softirq.c:1063 [inline]
 run_ksoftirqd+0x38/0x60 kernel/softirq.c:1055
 smpboot_thread_fn+0x3d3/0xaa0 kernel/smpboot.c:160
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>