rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=52cc/1/0x4000000000000000 softirq=22677/22685 fqs=1
rcu: 	(detected by 0, t=10502 jiffies, g=16289, q=130 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 7619 Comm: syz.0.431 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+0xa1/0x360
Code: 0f 84 f0 00 00 00 48 8b b4 24 90 00 00 00 4c 89 ef e8 33 9c 85 00 83 3d 9c 52 06 0e 00 0f 84 fa 00 00 00 65 8b 05 5f a2 03 11 <85> c0 0f 85 eb 00 00 00 65 48 8b 04 25 08 d0 a0 92 83 b8 ec 0a 00
RSP: 0018:ffffc900001e07e0 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000000 RCX: dd8209ef1f583300
RDX: 0000000000000000 RSI: ffffffff8b7d9bf7 RDI: 1ffff11026cc4f53
RBP: ffffffff81ada58b R08: 0000000000000001 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1026cc4f51 R12: 0000000000000000
R13: ffff888136627a98 R14: 0000000000000000 R15: 0000000000000001
FS:  00007f5056cf06c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000018c0 CR3: 0000000028a78000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _raw_spin_lock_irqsave+0xa7/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __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:perf_ioctl+0xd96/0x1ec0
Code: db 4d 85 e4 0f 95 c3 49 83 c6 20 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 aa 10 00 00 41 89 1e e8 5d 9d fb ff 45 31 ff <48> 8b 9c 24 90 00 00 00 48 89 df 48 83 c7 40 e8 f6 f0 89 09 48 89
RSP: 0018:ffffc90006ad7c00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffffffff8d9b9fdf RDI: 00000000ffffffff
RBP: ffffc90006ad7ea8 R08: ffffffff8fa38f37 R09: 1ffffffff1f471e6
R10: dffffc0000000000 R11: fffffbfff1f471e7 R12: 0000000000000001
R13: dffffc0000000000 R14: ffff888110a59900 R15: 0000000000000000
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5055d8eba9
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:00007f5056cf0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5055fd5fa0 RCX: 00007f5055d8eba9
RDX: 0000000000000001 RSI: 0000000000002402 RDI: 0000000000000008
RBP: 00007f5055e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5055fd6038 R14: 00007f5055fd5fa0 R15: 00007ffcae193e08
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g16289 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:27224 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+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 7604 Comm: syz.1.428 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+0xd33/0x12d0
Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 56 63 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 01 5f 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 e5 5e
RSP: 0018:ffffc90006d278a0 EFLAGS: 00000293
RAX: ffffffff81b4601b RBX: 1ffff11026cc7f69 RCX: ffff888021f0d640
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90006d27a20 R08: ffffffff8fa38f37 R09: 1ffffffff1f471e6
R10: dffffc0000000000 R11: fffffbfff1f471e7 R12: ffff88813663fb48
R13: dffffc0000000000 R14: ffff88804b03b1c0 R15: 0000000000000001
FS:  0000555582865500(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000100 CR3: 000000003e3f2000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f9/0x1130
 arch_jump_label_transform_apply+0x1c/0x30
 static_key_disable_cpuslocked+0xc5/0x1b0
 static_key_disable+0x1a/0x20
 tracepoint_probe_unregister+0x80e/0x9b0
 trace_event_reg+0x153/0x270
 perf_trace_event_unreg+0xb9/0x1b0
 perf_trace_destroy+0xa4/0x150
 __free_event+0x346/0x7e0
 perf_event_release_kernel+0x45b/0x510
 perf_release+0x38/0x50
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5d8d18eba9
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:00007ffdb12c8428 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f5d8d3d7da0 RCX: 00007f5d8d18eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5d8d3d7da0 R08: 0000000000000148 R09: 00000012b12c871f
R10: 00007f5d8d3d7cb0 R11: 0000000000000246 R12: 000000000001fc6c
R13: 00007f5d8d3d6180 R14: ffffffffffffffff R15: 00007ffdb12c8540
 </TASK>
