rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (6 ticks this GP) idle=9b3c/1/0x4000000000000000 softirq=24291/24292 fqs=31
rcu: 	(detected by 1, t=10502 jiffies, g=17141, q=230 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8347 Comm: syz.1.756 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:rcu_is_watching+0x67/0xb0
Code: 89 f7 e8 4c d0 7c 00 48 c7 c3 98 ff a1 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d d9 5d fa 10 <74> 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f c3 cc cc cc cc cc e8 e1 54
RSP: 0018:ffffc900000073b8 EFLAGS: 00000006
RAX: 0000000000059b3c RBX: ffff88804b032f98 RCX: d109a5134f6f5300
RDX: 0000000000010100 RSI: ffffffff8be33e60 RDI: ffffffff8be33e20
RBP: ffffc900000074d8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000000e78 R12: dffffc0000000000
R13: ffffffff81ada91e R14: ffffffff8dbe2d10 R15: dffffc0000000000
FS:  00007fa9b77f66c0(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32619ff8 CR3: 000000010a174000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_release+0x4b/0x3e0
 _raw_spin_unlock_irqrestore+0x70/0x110
 hrtimer_try_to_cancel+0x3be/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+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 1a 91 20 f6 48 89 df e8 72 28 21 f6 e8 6d 7b 4a f6 fb bf 01 00 00 00 <e8> 42 20 13 f6 65 8b 05 cb e0 23 07 85 c0 74 07 5b c3 cc cc cc cc
RSP: 0018:ffffc90000007c90 EFLAGS: 00000286
RAX: d109a5134f6f5300 RBX: ffff88804b025900 RCX: d109a5134f6f5300
RDX: 0000000000000002 RSI: ffffffff8d9ba191 RDI: 0000000000000001
RBP: ffffc90000007e10 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: dffffc0000000000
R13: ffff88804b025948 R14: 0000000000000000 R15: 0000000000000000
 __run_timer_base+0x1ad/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 df c4 eb 09 e8 ea 41 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90006846b98 EFLAGS: 00000282
RAX: d109a5134f6f5300 RBX: 0000000000000000 RCX: d109a5134f6f5300
RDX: 0000000000000006 RSI: ffffffff8d9ba191 RDI: ffffffff8be33e80
RBP: ffffc90006846bf0 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: ffff8881064b5640
R13: dffffc0000000000 R14: ffff888020c59cc0 R15: ffff88804b03ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__nf_register_net_hook+0x2be/0x930
Code: 00 00 00 fc ff df 4c 89 e8 48 c1 e8 03 48 89 44 24 30 42 80 3c 30 00 74 08 4c 89 ef e8 1b 6d 79 f8 4c 89 6c 24 38 4d 8b 6d 00 <4c> 89 ef 4c 89 e6 e8 47 e3 ff ff 49 89 c4 48 3d 01 f0 ff ff 72 16
RSP: 0018:ffffc90006846f80 EFLAGS: 00000246
RAX: 1ffff110243c0890 RBX: 0000000000000001 RCX: 0000000000080000
RDX: ffffc9000865b000 RSI: 0000000000000f28 RDI: 0000000000000f29
RBP: 0000000000000001 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: ffff888120978a80
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000001
 nf_register_net_hook+0x8a/0x190
 nf_tables_register_hook+0x216/0x440
 nf_tables_newchain+0x2469/0x2900
 nfnetlink_rcv+0x1132/0x2520
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __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: 0033:0x7fa9b958eba9
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:00007fa9b77f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa9b97d5fa0 RCX: 00007fa9b958eba9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000009
RBP: 00007fa9b9611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa9b97d6038 R14: 00007fa9b97d5fa0 R15: 00007ffeef9557f8
 </TASK>
rcu: rcu_preempt kthread starved for 10440 jiffies! g17141 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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  running task     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:
CPU: 1 UID: 0 PID: 8346 Comm: syz.1.756 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_single+0x3a9/0x590
Code: 33 44 89 f6 83 e6 01 31 ff e8 83 7a 0b 00 41 83 e6 01 75 11 e8 38 76 0b 00 4d 89 fe eb 3f e8 2e 76 0b 00 eb 3c 4d 89 fe f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 11 76 0b 00
RSP: 0018:ffffc9000682fa40 EFLAGS: 00000293
RAX: ffffffff81b44b4f RBX: ffffc9000682fa88 RCX: ffff8881064b1cc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000682fb30 R08: ffffc9000682f8e7 R09: 1ffff92000d05f1c
R10: dffffc0000000000 R11: fffff52000d05f1d R12: 1ffff92000d05f51
R13: dffffc0000000000 R14: 1ffff92000d05f4c R15: 1ffff92000d05f4c
FS:  0000555557f2d500(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32618ff8 CR3: 000000010a174000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 event_function_call+0x326/0x970
 perf_event_release_kernel+0x15d/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: 0033:0x7fa9b958eba9
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:00007ffeef955958 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fa9b97d7da0 RCX: 00007fa9b958eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fa9b97d7da0 R08: 000000000000b32c R09: 0000000cef955c4f
R10: 00007fa9b97d7cb0 R11: 0000000000000246 R12: 00000000000213cb
R13: 00007fa9b97d6090 R14: ffffffffffffffff R15: 00007ffeef955a70
 </TASK>
