clocksource: Long readout interval, skipping watchdog check: cs_nsec: 1845461420 wd_nsec: 1845461464
clocksource: Long readout interval, skipping watchdog check: cs_nsec: 87986406701 wd_nsec: 87986408720
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10499 ticks this GP) idle=847c/1/0x4000000000000000 softirq=17425/17434 fqs=0
rcu: 	(t=10500 jiffies g=8849 q=504 ncpus=2)
rcu: rcu_preempt kthread starved for 10500 jiffies! g8849 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:26632 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6581 Comm: syz.1.200 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:native_queued_spin_lock_slowpath+0xaf/0x8e0
Code: 00 00 00 c7 44 24 60 00 00 00 00 0f 1f 44 00 00 4c 8d 74 24 60 49 89 df 49 c1 ef 03 41 bd 01 00 00 00 eb 06 89 44 24 60 f3 90 <48> 89 df be 04 00 00 00 e8 64 3e a7 f6 48 b8 00 00 00 00 00 fc ff
RSP: 0018:ffffc900086b7800 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff88802a298248 RCX: ffffffff8b7bde5c
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88802a298248
RBP: ffffc900086b78f8 R08: ffff88802a29824b R09: 1ffff11005453049
R10: dffffc0000000000 R11: ffffed100545304a R12: 1ffff920010d6f08
R13: 0000000000000001 R14: ffffc900086b7860 R15: 1ffff11005453049
FS:  000055558a27f500(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32113ff8 CR3: 00000000391aa000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 queued_spin_lock_slowpath+0x43/0x50
 do_raw_spin_lock+0x21f/0x290
 futex_unqueue+0xf6/0x240
 __futex_wait+0x223/0x3e0
 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: 0033:0x7fbf3d38eba9
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:00007ffcf4f81a38 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 0000000000010d25 RCX: 00007fbf3d38eba9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbf3d5d5fac
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 0000001ff4f81d2f
R10: 00007ffcf4f81b30 R11: 0000000000000246 R12: 00007fbf3d5d5fac
R13: 00007ffcf4f81b30 R14: 0000000000010d57 R15: 00007ffcf4f81b50
 </TASK>
CPU: 0 UID: 0 PID: 6582 Comm: syz.1.200 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:__sanitizer_cov_trace_switch+0x7/0x130
Code: 0a 20 c3 cc cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 06 <48> 8b 4e 08 48 83 c1 f8 48 c1 c1 3d 48 83 f9 02 7f 1e 48 85 c9 74
RSP: 0018:ffffc90000007788 EFLAGS: 00000212
RAX: 0000000000000002 RBX: ffff888111fdf4d0 RCX: 0000000000000100
RDX: ffff8881078dd640 RSI: ffffffff8f7b9120 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff888111fdf4d0 R09: 000000000000000c
R10: 000000000000000c R11: 0000000000000100 R12: 0000000000000000
R13: 1ffff110228ba56b R14: 0000000000000080 R15: 000000000000004c
FS:  00007fbf3e1856c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 00000000391aa000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 00000000000d0602
Call Trace:
 <IRQ>
 ieee80211_get_bssid+0x107/0x200
 ieee80211_prepare_and_rx_handle+0x747/0x63f0
 ieee80211_rx_list+0x21b8/0x2a90
 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:futex_wake+0x30d/0x560
Code: 01 00 00 4d 8d 77 48 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 4c 89 f7 e8 17 3f 6f 00 49 83 3e 00 <0f> 85 f1 01 00 00 4d 8d 77 50 4c 89 f0 48 c1 e8 03 48 b9 00 00 00
RSP: 0018:ffffc90008157be0 EFLAGS: 00000246
RAX: 1ffff920010d6f60 RBX: 0000000000000fac RCX: dffffc0000000000
RDX: ffff8881078dd640 RSI: 0000000000000fac RDI: 0000000000000fac
RBP: ffffc90008157cf0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200102af6c R12: ffffc900086b7af8
R13: ffff88802a298288 R14: ffffc900086b7b00 R15: ffffc900086b7ab8
 do_futex+0x395/0x420
 __se_sys_futex+0x36f/0x400
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf3d38eba9
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:00007fbf3e1850e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fbf3d5d5fa8 RCX: 00007fbf3d38eba9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fbf3d5d5fac
RBP: 00007fbf3d5d5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: 000000000000000e R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbf3d5d6038 R14: 00007ffcf4f817f0 R15: 00007ffcf4f818d8
 </TASK>
sched: DL replenish lagged too much
