rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10460 ticks this GP) idle=e40c/1/0x4000000000000000 softirq=44823/44825 fqs=4604
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:   747578          0            0
rcu: 	cputime:    37706      14772           71   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=35125 q=5893 ncpus=2)
CPU: 1 UID: 0 PID: 11662 Comm: syz.4.1596 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:cfg80211_get_ies_channel_number+0x719/0x8d0
Code: f1 f6 eb 21 e8 28 ea f1 f6 eb 1a e8 21 ea f1 f6 eb 13 e8 1a ea f1 f6 eb 0c e8 13 ea f1 f6 eb 05 e8 0c ea f1 f6 b8 ff ff ff ff <48> 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 41 89
RSP: 0018:ffffc900001e01b0 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffff888108073980 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000100 R12: 1ffff11023437d50
R13: 0000000000000016 R14: 0000000000000028 R15: ffff88811a1bea88
FS:  00007f2c969f76c0(0000) GS:ffff8881a3c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555794165c8 CR3: 000000010b1ee000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000f0602
Call Trace:
 <IRQ>
 cfg80211_inform_single_bss_data+0x249/0x1ac0
 cfg80211_inform_bss_data+0x1fb/0x3b30
 cfg80211_inform_bss_frame_data+0x3d7/0x730
 ieee80211_bss_info_update+0x746/0x9e0
 ieee80211_scan_rx+0x593/0xa20
 ieee80211_rx_list+0x201c/0x2a90
 ieee80211_rx_napi+0x1a8/0x3d0
 ieee80211_handle_queued_frames+0xe8/0x1f0
 tasklet_action_common+0x36c/0x580
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 2b dc 49 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 80 12 f6 65 8b 05 6c 51 23 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc90001c0f640 EFLAGS: 00000206
RAX: a392465bc638f400 RBX: 0000000000000a02 RCX: a392465bc638f400
RDX: 0000000000000006 RSI: ffffffff8d9bad57 RDI: 0000000000000001
RBP: ffffc90001c0f6d0 R08: ffffffff8fa3b437 R09: 1ffffffff1f47686
R10: dffffc0000000000 R11: fffffbfff1f47687 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffffffff8e21f040 R15: 1ffff92000381ec8
 __mmdrop+0x2f4/0x570
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_common+0x83/0xd0
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 smp_call_function_single+0x470/0x590
 perf_install_in_context+0x593/0x8f0
 __se_sys_perf_event_open+0x193a/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2c95b8ec29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c969f7038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f2c95dd5fa0 RCX: 00007f2c95b8ec29
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00007f2c95c11e41 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c95dd6038 R14: 00007f2c95dd5fa0 R15: 00007ffec221c0d8
 </TASK>
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 68463897533 wd_nsec: 68463899002
