------------[ cut here ]------------
!oldest
WARNING: net/wireless/scan.c:513 at cfg80211_bss_expire_oldest net/wireless/scan.c:513 [inline], CPU#2: swapper/2/0
WARNING: net/wireless/scan.c:513 at __cfg80211_bss_update+0x19d8/0x2450 net/wireless/scan.c:2113, CPU#2: swapper/2/0
Modules linked in:
CPU: 2 UID: 0 PID: 0 Comm: swapper/2 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_bss_expire_oldest net/wireless/scan.c:513 [inline]
RIP: 0010:__cfg80211_bss_update+0x19d8/0x2450 net/wireless/scan.c:2113
Code: 00 31 ff 41 89 c5 89 c6 e8 45 de ec f6 45 85 ed 0f 85 65 f9 ff ff e8 c7 e3 ec f6 90 0f 0b 90 e9 57 f9 ff ff e8 b9 e3 ec f6 90 <0f> 0b 90 e9 fc fa ff ff e8 ab e3 ec f6 48 8b 44 24 08 48 8d 88 ac
RSP: 0018:ffffc90000658348 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffffffff91457604 RCX: 0000000000000302
RDX: ffff88801f69a580 RSI: ffffffff8b1f3ed7 RDI: ffff88801f69a580
RBP: ffff8880258ce088 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880258ce000
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888058c60190
FS:  0000000000000000(0000) GS:ffff8880d5d53000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcb5dbf5ff8 CR3: 00000000518e7000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 cfg80211_inform_single_bss_data+0x770/0x1dc0 net/wireless/scan.c:2440
 cfg80211_inform_bss_data+0x230/0x3c20 net/wireless/scan.c:3300
 cfg80211_inform_bss_frame_data+0x245/0x7c0 net/wireless/scan.c:3392
 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+0xbab/0xfc0 net/mac80211/rx.c:5427
 ieee80211_rx_list+0xf19/0x2160 net/mac80211/rx.c:5720
 ieee80211_rx_napi+0xdc/0x400 net/mac80211/rx.c:5743
 ieee80211_rx include/net/mac80211.h:5449 [inline]
 ieee80211_handle_queued_frames+0xc8/0x120 net/mac80211/main.c:452
 tasklet_action_common+0x2de/0x3d0 kernel/softirq.c:961
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 __do_softirq kernel/softirq.c:679 [inline]
 invoke_softirq kernel/softirq.c:519 [inline]
 __irq_exit_rcu+0x16a/0x210 kernel/softirq.c:758
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:775
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa3/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 37 94 02 e9 43 50 03 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 03 38 1a 00 fb f4 <c3> cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90
RSP: 0018:ffffc90000197e00 EFLAGS: 00000202
RAX: 0000000000050737 RBX: ffff88801f69a580 RCX: ffffffff8bd181c5
RDX: 0000000000000001 RSI: ffffffff8e38cf0c RDI: ffffffff8c623580
RBP: ffffed1003ed34b0 R08: 0000000000000001 R09: ffffed100d4c67bd
R10: ffff88806a633deb R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 1ffff92000032fc4 R15: dffffc0000000000
 arch_safe_halt arch/x86/include/asm/paravirt.h:62 [inline]
 default_idle+0x9/0x10 arch/x86/kernel/process.c:768
 default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x3ae/0x5b0 kernel/sched/idle.c:355
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:454
 start_secondary+0x21d/0x2d0 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x158
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	94                   	xchg   %eax,%esp
   1:	02 e9                	add    %cl,%ch
   3:	43 50                	rex.XB push %r8
   5:	03 00                	add    (%rax),%eax
   7:	0f 1f 00             	nopl   (%rax)
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	f3 0f 1e fa          	endbr64
  1e:	eb 07                	jmp    0x27
  20:	0f 00 2d 03 38 1a 00 	verw   0x1a3803(%rip)        # 0x1a382a
  27:	fb                   	sti
  28:	f4                   	hlt
* 29:	c3                   	ret <-- trapping instruction
  2a:	cc                   	int3
  2b:	cc                   	int3
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  35:	00 00 00
  38:	66 90                	xchg   %ax,%ax
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop