rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=dc64/1/0x4000000000000000 softirq=47318/47318 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=44681, q=221 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12638 Comm: syz.3.1811 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:do_raw_spin_lock+0xc/0x290
Code: 90 48 89 df e8 45 f7 86 00 eb 86 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 48 83 e4 e0 48 81 ec 80 00 00 00 48 89 fb 65 48 8b
RSP: 0018:ffffc900001e0860 EFLAGS: 00000092
RAX: 4341a0c6e3bf0f00 RBX: ffff888136627ac0 RCX: 4341a0c6e3bf0f00
RDX: 0000000000000000 RSI: ffffffff8dd8c926 RDI: ffff888136627ac0
RBP: ffffc900001e0870 R08: 0000000000000000 R09: ffffffff81ae2edb
R10: dffffc0000000000 R11: ffffed1026cc4f59 R12: dffffc0000000000
R13: ffff888136627b40 R14: 0000000000000802 R15: 1ffff9200003c110
FS:  00007f85a2cd76c0(0000) GS:ffff8881a3a03000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000123064000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _raw_spin_lock_irqsave+0xb3/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3b8/0x500
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70
Code: 8b 3d e4 ff 1b 0c 48 89 de 5b e9 43 13 5a 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 0c 25 08 d0 c1 92 65 8b 15 e8 79 01 11 81 e2 00 01 ff 00
RSP: 0018:ffffc9000326fa90 EFLAGS: 00000202
RAX: ffffffff818818e6 RBX: ffff88810d01d700 RCX: 0000000000000000
RDX: ffff88810d01d700 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff8184b902
R10: dffffc0000000000 R11: fffffbfff1f8686f R12: dffffc0000000000
R13: 0000000000000b00 R14: ffff888021c5bcac R15: ffff88810d01e060
 exit_signals+0x336/0x600
 do_exit+0x352/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1285/0x1340
 arch_do_signal_or_restart+0xa0/0x790
 exit_to_user_mode_loop+0x72/0x130
 do_syscall_64+0x2bd/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f85a1d8ec29
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:00007f85a2cd7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffea RBX: 00007f85a1fd5fa0 RCX: 00007f85a1d8ec29
RDX: 0000000000000094 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f85a1e11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f85a1fd6038 R14: 00007f85a1fd5fa0 R15: 00007ffff4b080b8
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g44681 f0x0 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:26696 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
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+0x4bc/0x870
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 12633 Comm: syz.6.1807 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:smp_call_function_many_cond+0xd38/0x12d0
Code: 89 ee 83 e6 01 31 ff e8 26 73 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 d1 6e 0b 00 eb 38 f3 90 42 0f b6 04 2b <84> c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 b5 6e 0b 00 eb e4 44
RSP: 0018:ffffc900031cf420 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff11026cc7ffd RCX: 0000000000080000
RDX: ffffc9000f56a000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc900031cf5a0 R08: ffffffff8fc34377 R09: 1ffffffff1f8686e
R10: dffffc0000000000 R11: fffffbfff1f8686f R12: ffff88813663ffe8
R13: dffffc0000000000 R14: ffff88804b03b200 R15: 0000000000000001
FS:  00007fc82335d6c0(0000) GS:ffff8880b8403000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc82335cfc8 CR3: 000000002d158000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f9/0x1130
 __static_call_transform+0x4eb/0x750
 arch_static_call_transform+0x98/0xc0
 __static_call_update+0xe4/0x5d0
 tracepoint_add_func+0x91e/0xa10
 tracepoint_probe_register+0x5d/0x90
 perf_trace_event_init+0x4e1/0x9d0
 perf_trace_init+0x23d/0x2d0
 perf_tp_event_init+0x8d/0x120
 perf_try_init_event+0x17f/0x870
 perf_event_alloc+0x133e/0x2be0
 __se_sys_perf_event_open+0x772/0x1d70
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc82258ec29
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:00007fc82335d038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fc8227d6090 RCX: 00007fc82258ec29
RDX: ffffffffffffffff RSI: 00000000000005a8 RDI: 0000200000000640
RBP: 00007fc822611e41 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc8227d6128 R14: 00007fc8227d6090 R15: 00007fff98aec418
 </TASK>
