rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=22a4/1/0x4000000000000000 softirq=17448/17448 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=9405, q=657 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6583 Comm: syz.0.178 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:its_return_thunk+0x0/0x10
Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc <c3> cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 6b 32 b6 f5 cc
RSP: 0018:ffffc900001e0510 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88802ffce130 RCX: b5a571af49c78000
RDX: ffff88802ffcd640 RSI: ffffffff8e13a120 RDI: ffff88802ffce130
RBP: 00000000ffffffff R08: ffffc900001e05ef R09: 0000000000000000
R10: ffffc900001e05e0 R11: fffff5200003c0be R12: 0000000000000046
R13: ffff88802ffcd640 R14: ffffffff8e13a120 R15: 0000000000000000
FS:  00007fb463e556c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f734ce0a1d0 CR3: 000000010efbe000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_is_held_type+0xa8/0x190
 trace_call_bpf+0x1f4/0x850
 perf_trace_run_bpf_submit+0x78/0x170
 perf_trace_lock_acquire+0x335/0x410
 lock_acquire+0x311/0x360
 _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_trace_init+0x1a2/0x2d0
Code: f4 bb 03 00 84 c0 0f 85 a1 00 00 00 e8 a7 88 f6 ff 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 b1 09 5a 00 48 8b 1b <48> 81 fb 20 d7 19 8e 74 45 e8 80 88 f6 ff e9 d1 fe ff ff 44 89 e1
RSP: 0018:ffffc90003b3fa78 EFLAGS: 00000246
RAX: 1ffffffff1d17cf4 RBX: ffffffff8e8be620 RCX: ffff88802ffcd640
RDX: 0000000000000000 RSI: 0000000000000a44 RDI: 00000000000000eb
RBP: 0000000000000002 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: 0000000000000a44
R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000000000eb
 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/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb462f8eba9
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:00007fb463e55038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fb4631d5fa0 RCX: 00007fb462f8eba9
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000200000000040
RBP: 00007fb463011e19 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb4631d6038 R14: 00007fb4631d5fa0 R15: 00007ffdf4e0e218
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g9405 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=2696
rcu: rcu_preempt kthread starved for 10502 jiffies! g9405 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27160 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>
