rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=9201, q=616 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294955267-4294944765), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g9201 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=3011
rcu: rcu_preempt kthread starved for 10502 jiffies! g9201 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200 ->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 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>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6209 Comm: syz.0.95 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+0x44c/0xd20
Code: 0f 44 ea 44 8b a7 e8 0a 00 00 41 8d 4c 24 ff 83 f9 ff bd ff ff ff ff 0f 4c e9 ff c5 45 8d 7c 24 01 49 ff cc 44 89 f9 83 c1 fe <78> 44 44 89 e3 81 e3 ff ff ff 7f 83 f9 31 73 1d 48 8d 0c 9b 8b 8c
RSP: 0018:ffffc900001e0750 EFLAGS: 00000086
RAX: 00000000000c4067 RBX: 0000000000000002 RCX: 00000000ffffffff
RDX: 0000000000000002 RSI: 0000000000004000 RDI: ffff88801eee1cc0
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81adabcb
R10: dffffc0000000000 R11: ffffed1026cc4f51 R12: ffffffffffffffff
R13: 0000000000000002 R14: ffff88801eee27b0 R15: 0000000000000001
FS:  00007f688734d6c0(0000) GS:ffff8881a3c11000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32514ff8 CR3: 000000010fe96000 CR4: 00000000000006f0
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:get_page_from_freelist+0x8c1/0x22c0
Code: 80 3c 20 00 74 08 4c 89 ef e8 eb 14 0d 00 49 8b 45 00 48 c1 e8 37 83 e0 07 48 8b 8c 24 48 01 00 00 65 48 01 0c c5 80 26 a2 92 <e9> 6d 14 00 00 e8 f5 f2 1c ff 4d 85 ed 75 bf 49 63 d6 48 8b 4c 24
RSP: 0018:ffffc900061977e0 EFLAGS: 00000212
RAX: 0000000000000002 RBX: ffff888136640000 RCX: 0000000000000008
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00000000ffffffff
RBP: ffffc90006197a50 R08: ffff888136640003 R09: 1ffff11026cc8000
R10: dffffc0000000000 R11: ffffed1026cc8001 R12: dffffc0000000000
R13: ffffea000490b400 R14: 0000000000000000 R15: ffffc90006197abc
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x370
 ___slab_alloc+0xbeb/0x1420
 kmem_cache_alloc_noprof+0x283/0x3c0
 sk_prot_alloc+0x57/0x220
 sk_alloc+0x3a/0x370
 __vsock_create+0x3b/0x930
 vsock_create+0x122/0x450
 __sock_create+0x4b3/0x9f0
 __sys_socket+0xd7/0x1b0
 __x64_sys_socket+0x7a/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f688658ec29
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:00007f688734d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f68867d5fa0 RCX: 00007f688658ec29
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000028
RBP: 00007f6886611e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f68867d6038 R14: 00007f68867d5fa0 R15: 00007ffe980f6538
 </TASK>
