rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=31561, q=365 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294969721-4294959221), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g31561 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27160 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11215 Comm: syz.2.1521 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:lock_acquire+0x13d/0x360
Code: 00 6a 00 55 ff 74 24 30 e8 e0 02 00 00 48 83 c4 28 48 c7 c7 03 5d ba 8d e8 00 03 dc 09 b8 ff ff ff ff 65 0f c1 05 a3 20 03 11 <83> f8 01 0f 85 c9 00 00 00 48 c7 44 24 30 00 00 00 00 9c 8f 44 24
RSP: 0018:ffffc90000006550 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000000 RCX: c7024ea6aec00000
RDX: 0000000000000000 RSI: ffffffff8dba5d03 RDI: ffffffff8be33380
RBP: ffffffff8172c195 R08: 0000000000000000 R09: ffffffff8172c195
R10: ffffc90000006770 R11: fffff52000000cf0 R12: 0000000000000002
R13: ffffffff8e139ee0 R14: 0000000000000000 R15: 0000000000000046
FS:  00007f26dd4376c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000001 CR3: 0000000027072000 CR4: 00000000000006f0
DR0: 0100000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 unwind_next_frame+0xc2/0x2390
 perf_callchain_kernel+0x469/0x5c0
 get_perf_callchain+0x3f3/0x6b0
 perf_prepare_sample+0x475/0x2390
 perf_event_output_forward+0x151/0x430
 __perf_event_overflow+0x7cf/0xe10
 perf_swevent_hrtimer+0x3c5/0x550
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:memcpy_orig+0x19/0x130
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 f8 48 83 fa 20 72 7e 40 38 fe 7c 35 48 83 ea 20 48 83 ea 20 4c 8b 06 <4c> 8b 4e 08 4c 8b 56 10 4c 8b 5e 18 48 8d 76 20 4c 89 07 4c 89 4f
RSP: 0018:ffffc900000071f8 EFLAGS: 00000287
RAX: ffff888023bbf79d RBX: ffff888023bbf79d RCX: ffffffff8acc832d
RDX: ffffffffffffffe8 RSI: ffff88811372d8f4 RDI: ffff888023bbf79d
RBP: ffffc900000073f0 R08: 1010101010100600 R09: 1ffff11004777ef8
R10: dffffc0000000000 R11: ffffed1004777ef9 R12: 000000000000002b
R13: ffffc900000076c0 R14: dffffc0000000000 R15: 1ffff11004777ef3
 cfg80211_inform_single_bss_data+0xa5d/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:__list_add_valid_or_report+0x44/0x130
Code: 48 85 d2 0f 84 93 00 00 00 49 89 f6 49 89 ff 49 bd 00 00 00 00 00 fc ff df 4c 8d 63 08 4c 89 e5 48 c1 ed 03 42 80 7c 2d 00 00 <74> 08 4c 89 e7 e8 82 25 53 fd 4d 39 34 24 75 71 4d 89 f4 49 c1 ec
RSP: 0018:ffffc900038ef898 EFLAGS: 00000246
RAX: ffffffff8b7429b4 RBX: ffff88811b4f2588 RCX: ffff888108aa8000
RDX: ffff88811b4f2588 RSI: ffff88811b4f2588 RDI: ffffc900038efab8
RBP: 1ffff1102369e4b2 R08: ffff888108aa801b R09: 1ffff11021155003
R10: dffffc0000000000 R11: ffffed1021155004 R12: ffff88811b4f2590
R13: dffffc0000000000 R14: ffff88811b4f2588 R15: ffffc900038efab8
 plist_add+0x3f8/0x540
 __futex_queue+0xee/0x160
 futex_wait_setup+0x434/0x590
 __futex_wait+0x148/0x3e0
 futex_wait+0x104/0x360
 do_futex+0x333/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f26dc58ebe9
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:00007f26dd4370e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f26dc7b6098 RCX: 00007f26dc58ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f26dc7b6098
RBP: 00007f26dc7b6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f26dc7b6128 R14: 00007fffeb3bb580 R15: 00007fffeb3bb668
 </TASK>
sched: DL replenish lagged too much
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 93557534933 wd_nsec: 93557537014
