rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=1e94/1/0x4000000000000000 softirq=189210/189210 fqs=1
rcu: 	(detected by 1, t=10502 jiffies, g=303253, q=232 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 25651 Comm: syz.7.21121 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:__lock_acquire+0x46/0x2cf0
Code: 24 e0 00 00 00 65 48 8b 05 df 06 98 11 48 89 44 24 08 31 ed 83 3d 89 6a 8f 0e 00 0f 84 ef 13 00 00 45 89 cf 49 89 f9 48 8b 07 <48> 3d c0 93 fd 93 0f 84 da 13 00 00 41 89 cd 41 89 d6 8b 0d 42 f4
RSP: 0018:ffffc90000007b40 EFLAGS: 00000002
RAX: ffffffff9a63d0e0 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9a74bb40
RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff9a74bb40
R10: dffffc0000000000 R11: fffff52000000fac R12: 0000000000000000
R13: ffffffff9a74bb40 R14: 0000000000000001 R15: 0000000000000001
FS:  00007f39599026c0(0000) GS:ffff88818dc84000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3958a4f0d7 CR3: 00000001a37ee000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_acquire+0x106/0x350
 _raw_spin_lock_irqsave+0x40/0x60
 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+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80
Code: f7 e8 dd c8 f5 f5 f7 c3 00 02 00 00 74 05 e8 30 5e 21 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> f4 47 e7 f5 65 8b 05 cd 2d 8d 07 85 c0 74 18 5b 41 5e c3 cc cc
RSP: 0018:ffffc90007aefaa8 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dfaff21 RDI: 0000000000000001
RBP: ffffc90007aefbd0 R08: ffffffff9030f0f7 R09: 1ffffffff2061e1e
R10: dffffc0000000000 R11: fffffbfff2061e1f R12: ffffc90007aefc90
R13: 0000000000000000 R14: ffffffff9a496858 R15: 1ffff92000f5df64
 __do_adjtimex+0xb46/0xe70
 do_adjtimex+0xd1/0x370
 __x64_sys_clock_adjtime+0x252/0x340
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f395899ce59
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:00007f3959902028 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f3958c15fa0 RCX: 00007f395899ce59
RDX: 0000000000000000 RSI: 0000200000000340 RDI: 0000000000000000
RBP: 00007f3958a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3958c16038 R14: 00007f3958c15fa0 R15: 00007ffeccc0fe38
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g303253 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:27544 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x389/0x470
 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: 9958 Comm: kworker/u10:12 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:__sanitizer_cov_trace_pc+0x8/0x70
Code: 8b 3d 04 3b 61 0c 48 89 de 5b e9 13 1a 60 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d e8 fa 73 11 65 8b 15 09 fb 73 11 81 e2 00 01 ff 00 74
RSP: 0018:ffffc900041876f8 EFLAGS: 00000202
RAX: ffffffff81b9c306 RBX: ffff88823c63c2c8 RCX: ffff888169dd8000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004187840 R08: ffffffff9030f0f7 R09: 1ffffffff2061e1e
R10: dffffc0000000000 R11: fffffbfff2061e1f R12: 1ffff110242085b9
R13: dffffc0000000000 R14: ffff888121042dc8 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8882a9284000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3958c17dac CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 smp_call_function_many_cond+0xfe6/0x13d0
 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+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
