rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=e80c/1/0x4000000000000000 softirq=79310/79310 fqs=0
rcu: 	(detected by 1, t=10506 jiffies, g=85629, q=336 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5055 Comm: udevd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:kasan_check_range+0x78/0x2c0
Code: 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 <4d> 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48
RSP: 0000:ffffc900033d7b68 EFLAGS: 00000802
RAX: 00000000ffffff01 RBX: dffffc0000000001 RCX: ffffffff81a240bb
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc900033d7be0
RBP: ffffc900033d7c50 R08: ffffc900033d7be3 R09: 1ffff9200067af7c
R10: dffffc0000000000 R11: fffff5200067af7c R12: fffff5200067af7d
R13: ffffffff9a63a9e8 R14: fffff5200067af7d R15: 1ffff9200067af7c
FS:  00007ffb12895c80(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558d7e32c018 CR3: 000000010f7d4000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 do_raw_spin_lock+0x12b/0x2f0
 _raw_spin_lock_irqsave+0x4c/0x60
 debug_object_activate+0x83/0x580
 enqueue_hrtimer+0xa9/0x2c0
 __hrtimer_run_queues+0x4d2/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0033:0x7ffb124d74e0
Code: 66 0f eb c2 66 0f d7 c8 48 c1 e1 30 48 09 c8 89 f9 28 d1 48 d3 e8 48 85 c0 0f 85 4b ff ff ff e9 a0 fe ff ff 66 0f 1f 44 00 00 <66> 0f 6e ce 89 f8 25 ff 0f 00 00 66 0f 60 c9 3d c0 0f 00 00 66 0f
RSP: 002b:00007fffa018e978 EFLAGS: 00000246
RAX: 00007fffa018eff0 RBX: 0000000000000000 RCX: 0000000000000016
RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000558d3f7d91c4
RBP: 00007fffa018eea0 R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000812 R11: 0000000000000293 R12: 00007fffa018efd8
R13: 00000000fbad8000 R14: 00007fffa018efd8 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g85629 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:27872 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 12825 Comm: kworker/u10:7 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:smp_call_function_many_cond+0xfcf/0x13d0
Code: 79 45 8b 2e 44 89 ee 83 e6 01 31 ff e8 fa fc 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 a5 f8 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 8a f8 0b
RSP: 0018:ffffc90009cd7700 EFLAGS: 00000293
RAX: ffffffff81b9ab26 RBX: ffff88823c63c148 RCX: ffff8881ad709d80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90009cd7840 R08: ffffffff903097f7 R09: 1ffffffff20612fe
R10: dffffc0000000000 R11: fffffbfff20612ff R12: 1ffff11024208589
R13: dffffc0000000000 R14: ffff888121042c48 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882a9293000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14271456b8 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f5/0x1160
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_enable_cpuslocked+0x128/0x240
 static_key_enable+0x1a/0x20
 toggle_allocation_gate+0xab/0x290
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
