rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=996c/1/0x4000000000000000 softirq=18336/18339 fqs=4396
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1210761          0            0
rcu: 	cputime:     8691      43797           40   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=13989 q=9656 ncpus=2)
CPU: 1 UID: 0 PID: 6192 Comm: syz.2.65 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+0x1f2/0x2550
Code: c0 49 81 fc e8 8b ab 8b 0f 93 c1 08 c1 0f 85 05 01 00 00 48 c7 c0 00 00 00 81 4d 89 e7 49 29 c7 49 c1 ef 08 8b 15 5e 49 af 0c <8d> 42 ff 44 39 f8 0f 86 73 04 00 00 44 89 f8 4c 8d 2c 85 6c ec 70
RSP: 0018:ffffc90000a07c78 EFLAGS: 00000206
RAX: ffffffff81000000 RBX: 0000000000000001 RCX: 0000000000000300
RDX: 00000000000aab8d RSI: ffffffff8c28aa40 RDI: ffffffff8c28aa00
RBP: dffffc0000000000 R08: ffffffff8176e256 R09: ffffffff8e95cd60
R10: ffffc90000a07d98 R11: ffffffff81b0d880 R12: ffffffff8af4a615
R13: 1ffff92000140fa9 R14: ffffc90000a07d48 R15: 000000000009f4a6
FS:  00007f809e7866c0(0000) GS:ffff8882a9293000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcaa108008 CR3: 00000001b09cc000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c5/0x640
 ieee80211_inform_bss+0xc75/0x1160
 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 c6 7a 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: 0018:ffffc90003ba7930 EFLAGS: 00000202
RAX: 000000000003f0d3 RBX: 1ffff110478c7784 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa3a1a RDI: ffff8881773a96a8
RBP: ffffc90003ba7990 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: ffff88823c63ae88
R13: ffff8881773a8000 R14: ffff888102eabb00 R15: dffffc0000000000
 __schedule+0x17bc/0x5680
 preempt_schedule_irq+0x4d/0xa0
 irqentry_exit+0x14f/0x730
 asm_sysvec_call_function_single+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 6d f0 af 09 48 8d 8b
RSP: 0018:ffffc90003ba7cf8 EFLAGS: 00000246
RAX: dfd1006453ba5200 RBX: ffff8881773a8000 RCX: 0000000000080000
RDX: ffffc90028d25000 RSI: 0000000000006a53 RDI: ffff8881bd865000
RBP: ffffc90003ba7ee0 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: 1ffff92000774fb0
R13: ffff888173f37628 R14: ffff888173f37870 R15: ffff8881bd865000
 __se_sys_perf_event_open+0x190a/0x1d40
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f809d99cdd9
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:00007f809e786028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f809dc15fa0 RCX: 00007f809d99cdd9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000004c0
RBP: 00007f809da32d69 R08: 0000000000000008 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f809dc16038 R14: 00007f809dc15fa0 R15: 00007ffdbf718da8
 </TASK>
sched: DL replenish lagged too much
