rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (9637 ticks this GP) idle=2b34/1/0x4000000000000000 softirq=19843/19843 fqs=4760
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1228224          0            0
rcu: 	cputime:    12108      40381           38   ==> 52500(ms)
rcu: 	(t=10501 jiffies g=16293 q=4248 ncpus=2)
CPU: 0 UID: 0 PID: 6503 Comm: syz.0.80 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:unwind_next_frame+0x484/0x2550
Code: d2 84 c0 48 0f 45 d1 48 89 15 e8 4c c8 11 48 85 d2 0f 84 3b 02 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 c2 19 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0000:ffffc90000006a58 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff90b8b278 RCX: ffffffff90b8b280
RDX: ffffffff916c4146 RSI: ffffffff916c4116 RDI: ffffffff8c288380
RBP: dffffc0000000000 R08: 0000000000000019 R09: ffffffff8e95cd60
R10: ffffc90000006b78 R11: ffffffff81b0d760 R12: ffffffff916c414a
R13: ffffffff916c414b R14: ffffc90000006b28 R15: ffffffff90b8b27c
FS:  00007fa6499e86c0(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f056304be3f CR3: 00000001114c8000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_noprof+0x35c/0x760
 ieee802_11_parse_elems_full+0x159/0x2ab0
 ieee80211_inform_bss+0x161/0x1160
 cfg80211_inform_single_bss_data+0xcf9/0x1af0
 cfg80211_inform_bss_data+0x266/0x3c40
 cfg80211_inform_bss_frame_data+0x3c7/0x730
 ieee80211_bss_info_update+0x794/0xa40
 ieee80211_scan_rx+0x552/0xa40
 ieee80211_rx_list+0x29e9/0x3730
 ieee80211_rx_napi+0x1b1/0x3e0
 ieee80211_handle_queued_frames+0xe8/0x1e0
 tasklet_action_common+0x2da/0x4b0
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x427/0xbe0
Code: 41 c7 84 24 e0 0d 00 00 00 00 00 00 0f 1f 44 00 00 49 83 c4 48 4c 89 e7 e8 e6 7b 15 0a e8 41 eb 38 00 fb 49 8d bd a8 16 00 00 <48> 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 7b 03 00 00 41 80
RSP: 0000:ffffc900040c7930 EFLAGS: 00000206
RAX: 000000000018b2e7 RBX: 1ffff11024207784 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa1204 RDI: ffff8881b89151a8
RBP: ffffc900040c7990 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: ffff88812103ae88
R13: ffff8881b8913b00 R14: ffff888102eabb00 R15: dffffc0000000000
 __schedule+0x17bc/0x5680
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x730
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:perf_unpin_context+0x0/0x70
Code: f1 80 e1 07 80 c1 03 38 c1 7c b6 4c 89 f7 e8 a7 71 36 00 eb ac 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <41> 56 53 48 89 fb e8 c5 36 cb ff 48 89 df e8 8d f1 af 09 48 8d 8b
RSP: 0018:ffffc900040c7cf8 EFLAGS: 00000246
RAX: f40fb82ea199a600 RBX: ffff8881b8913b00 RCX: ffff8881b8913b00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880126b3c00
RBP: ffffc900040c7ee0 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: 1ffff92000818fb0
R13: ffff88801c54a550 R14: ffff88801c54a798 R15: ffff8880126b3c00
 __se_sys_perf_event_open+0x190a/0x1d40
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa648b9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa6499e8028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fa648e16180 RCX: 00007fa648b9cdd9
RDX: ffefffffffffffff RSI: 0000000000000000 RDI: 0000200000000fc0
RBP: 00007fa648c32d69 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa648e16218 R14: 00007fa648e16180 R15: 00007ffed8490908
 </TASK>
sched: DL replenish lagged too much
