rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=34fc/1/0x4000000000000000 softirq=26880/26880 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P8477/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=19609, q=324 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 8483 Comm: syz.1.716 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+0x0/0x290
Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 7c 90 48 89 df e8 35 2c 85 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
RSP: 0018:ffffc900001e0878 EFLAGS: 00000092
RAX: eb5e7457d85a5800 RBX: ffff888136627a80 RCX: eb5e7457d85a5800
RDX: 0000000000000000 RSI: ffffffff8dba9832 RDI: ffff888136627a80
RBP: ffffc900001e0918 R08: 0000000000000000 R09: ffffffff81ada78b
R10: dffffc0000000000 R11: ffffed1026cc4f51 R12: dffffc0000000000
R13: ffff888136627b00 R14: 0000000000000802 R15: 1ffff9200003c110
FS:  00007f9fb29ab6c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32117ff8 CR3: 000000011f518000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 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+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+0x19df/0x22c0
Code: 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 e4 00 00 00 4b 63 5c 3d 34 4b 8d 3c 2f 48 83 c7 38 48 89 f8 <48> c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 05 e8 98
RSP: 0018:ffffc90006cb73e0 EFLAGS: 00000282
RAX: ffffea0004799038 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0004799038
RBP: ffffc90006cb7650 R08: ffffea0004799037 R09: 1ffffd40008f3206
R10: dffffc0000000000 R11: fffff940008f3207 R12: dffffc0000000000
R13: ffffea0004799000 R14: 0000000000000000 R15: 0000000000000000
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 ___kmalloc_large_node+0x5f/0x1b0
 __kmalloc_large_node_noprof+0x18/0x90
 __kvmalloc_node_noprof+0x6d/0x5f0
 netlink_alloc_large_skb+0x5d/0x110
 netlink_sendmsg+0x5c6/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9fb1b8eba9
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:00007f9fb29ab038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9fb1dd5fa0 RCX: 00007f9fb1b8eba9
RDX: 3500000000000000 RSI: 0000200000000000 RDI: 0000000000000009
RBP: 00007f9fb1c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9fb1dd6038 R14: 00007f9fb1dd5fa0 R15: 00007fff3ee73a28
 </TASK>
task:syz.0.714       state:R  running task     stack:24896 pid:8477  tgid:8476  ppid:5848   task_flags:0x400140 flags:0x00004002
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 preempt_schedule_notrace+0xd1/0x110
 preempt_schedule_notrace_thunk+0x16/0x30
 lock_acquire+0x347/0x360
 percpu_ref_put+0x35/0x180
 __memcg_kmem_charge_page+0x13b/0x240
 __alloc_frozen_pages_noprof+0x1b5/0x370
 alloc_pages_bulk_noprof+0x560/0x710
 alloc_pages_bulk_mempolicy_noprof+0x341/0x1650
 __vmalloc_node_range_noprof+0x733/0x12f0
 __vmalloc_noprof+0xb1/0xf0
 bpf_prog_alloc_no_stats+0x4a/0x4d0
 bpf_prog_alloc+0x3c/0x1a0
 bpf_prog_load+0x735/0x1930
 __sys_bpf+0x528/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f42c138eba9
RSP: 002b:00007f42c2276038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f42c15d5fa0 RCX: 00007f42c138eba9
RDX: 0000000000000094 RSI: 0000200000000600 RDI: 0000000000000005
RBP: 00007f42c1411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f42c15d6038 R14: 00007f42c15d5fa0 R15: 00007ffe014e9c48
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g19609 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=7625
rcu: rcu_preempt kthread starved for 10502 jiffies! g19609 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>
