rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=5b8c/1/0x4000000000000000 softirq=37887/37887 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=34945, q=426 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10827 Comm: syz.2.1345 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+0x893/0xd20
Code: 83 3d 84 66 06 0e 00 0f 85 36 02 00 00 48 83 7c 24 28 00 0f 84 bc 01 00 00 41 8b 46 f8 25 ff 1f 00 00 48 0f a3 05 9d 33 0b 12 <0f> 83 5a 01 00 00 48 69 c0 c8 00 00 00 48 8d 80 10 b3 49 93 e9 87
RSP: 0018:ffffc900001e0750 EFLAGS: 00000003
RAX: 0000000000000026 RBX: 0000000000000001 RCX: 0000000090213bdc
RDX: 00000000001a71fd RSI: 00000000727d5714 RDI: ffff88810b42b980
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff81adabcb
R10: dffffc0000000000 R11: ffffed1026cc4f51 R12: 0000000000000068
R13: ffff88810b42c470 R14: ffff88810b42c498 R15: d6bf87c490213bdc
FS:  00007fc9b57dd6c0(0000) GS:ffff8881a3c11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32263fff CR3: 000000010d26e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x120/0x360
 _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:__list_del_entry_valid_or_report+0x83/0x190
Code: 00 00 00 49 bc 00 01 00 00 00 00 ad de 4d 39 e6 0f 84 84 00 00 00 49 83 c4 22 4d 39 e7 0f 84 94 00 00 00 4d 89 fc 49 c1 ec 03 <43> 80 3c 2c 00 74 08 4c 89 ff e8 ae 9d 52 fd 49 39 1f 0f 85 92 00
RSP: 0018:ffffc9000251f650 EFLAGS: 00000a06
RAX: 1ffffd4000876dd9 RBX: ffffea00043b6ec8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 1ffffffff1f47ccc RDI: ffffea00043b6ed0
RBP: ffffc9000251f870 R08: 0000000000000180 R09: 0000000000000080
R10: dffffc0000000000 R11: ffffffff8b96a9c4 R12: 1ffff11026cc800c
R13: dffffc0000000000 R14: ffffea00042bef48 R15: ffff888136640060
 __rmqueue_pcplist+0x148f/0x1df0
 get_page_from_freelist+0x86a/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 __alloc_pages_noprof+0xa/0x30
 bpf_ringbuf_alloc+0x10c/0x590
 ringbuf_map_alloc+0x1c8/0x2f0
 map_create+0xaa6/0x1640
 __sys_bpf+0x5f0/0x860
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc9b498ec29
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:00007fc9b57dd038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fc9b4bd6090 RCX: 00007fc9b498ec29
RDX: 0000000000000050 RSI: 0000200000000d80 RDI: 0000000000000000
RBP: 00007fc9b4a11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc9b4bd6128 R14: 00007fc9b4bd6090 R15: 00007ffd7ebacc18
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g34945 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=15207
rcu: rcu_preempt kthread starved for 10502 jiffies! g34945 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:26896 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>
