rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10415 ticks this GP) idle=1b1c/1/0x4000000000000000 softirq=39621/39740 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:  1075922        340            0
rcu: 	cputime:    31010      21477           49   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=34637 q=1463 ncpus=2)
CPU: 1 UID: 0 PID: 10655 Comm: syz.3.1184 Not tainted 6.17.0-rc1-syzkaller-00022-g07866544e410 #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+0x0/0x360
Code: 05 95 e5 02 11 a9 00 ff ff 00 0f 95 c0 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 60 4d 89 ce 45
RSP: 0018:ffffc900001e0060 EFLAGS: 00000246
RAX: ffffffff89ebe510 RBX: dffffc0000000000 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e139ee0
RBP: 1ffff11021afff62 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000100 R12: ffff88810d7ffb10
R13: dffffc0000000000 R14: ffff88810d7ffb00 R15: ffff88810de98000
FS:  00007f6f826de6c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558c5f4d1df8 CR3: 0000000110038000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 ip_output+0x81/0x3c0
 synproxy_send_client_synack+0x8bb/0xe20
 nft_synproxy_eval_v4+0x36e/0x560
 nft_synproxy_do_eval+0x345/0x570
 nft_do_chain+0x40c/0x1920
 nft_do_chain_inet+0x25d/0x340
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x206/0x3a0
 NF_HOOK+0x30c/0x3a0
 __netif_receive_skb+0x143/0x380
 process_backlog+0x60e/0x14f0
 __napi_poll+0xc7/0x360
 net_rx_action+0x707/0xe30
 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:__page_table_check_zero+0x200/0x530
Code: 03 48 89 44 24 18 83 7c 24 04 1f 0f 87 22 01 00 00 e8 54 67 91 ff 4c 89 ef 48 89 ee e8 a9 69 91 ff 4c 39 ed 0f 84 6c 01 00 00 <4c> 8b 3d 69 5c f9 0b 4d 01 e7 4c 89 ff be 04 00 00 00 e8 e9 db f4
RSP: 0018:ffffc900063cf5f0 EFLAGS: 00000202
RAX: ffffffff822e4467 RBX: 0000000000000000 RCX: ffff8881098b1cc0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
RBP: 0000000000000002 R08: ffff88801b8d768f R09: 1ffff1100371aed1
R10: dffffc0000000000 R11: ffffed100371aed2 R12: ffff88801b8d7690
R13: 0000000000000001 R14: 0000000000022b15 R15: 0000000000022b15
 __free_frozen_pages+0xbd7/0xd30
 pagetable_dtor_free+0x2d2/0x3b0
 __mmdrop+0xb5/0x580
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:strlen+0x43/0x70
Code: fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 <89> d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 79 01 ae f6 4c 89
RSP: 0018:ffffc900063cfbb8 EFLAGS: 00000206
RAX: 0000000000000005 RBX: ffffffff8b93f36a RCX: 000000008b93f301
RDX: 0000000000000000 RSI: ffff88801c287620 RDI: ffffffff8b93f360
RBP: ffffc900063cfcb0 R08: ffffffff8b93f680 R09: 1ffff11003b88e8a
R10: dffffc0000000000 R11: ffffed1003b88e8b R12: ffff88801c287620
R13: ffffffff8b93f360 R14: dffffc0000000000 R15: 0000000000000009
 alloc_file_pseudo+0xb6/0x210
 anon_inode_getfile+0xc5/0x1a0
 __se_sys_perf_event_open+0xf20/0x1d70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f8178ebe9
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:00007f6f826de038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f6f819b5fa0 RCX: 00007f6f8178ebe9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000100
RBP: 00007f6f81811e19 R08: 0000000000000009 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6f819b6038 R14: 00007f6f819b5fa0 R15: 00007fff74b9ee18
 </TASK>
