------------[ cut here ]------------
WARNING: CPU: 1 PID: 0 at lib/ref_tracker.c:110 ref_tracker_free+0x4e8/0x6b0 lib/ref_tracker.c:110
Modules linked in:

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.2.0-rc2-syzkaller-00383-gd4f12a8271fb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:ref_tracker_free+0x4e8/0x6b0 lib/ref_tracker.c:110
Code: 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 c3 01 00 00 48 b8 22 01 00 00 00 00 ad de 49 89 46 08 e9 71 fe ff ff e8 18 77 47 fd <0f> 0b e9 bd fb ff ff e8 0c 77 47 fd 4c 8d 75 48 be 04 00 00 00 bb
RSP: 0018:ffffc900001e0b48 EFLAGS: 00010246

RAX: 0000000000000000 RBX: ffff888076fa7338 RCX: 0000000000000100
RDX: ffff88813fe71d40 RSI: ffffffff8439db78 RDI: 0000000000000001
RBP: ffff8880208501c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000094001 R12: 1ffff9200003c16b
R13: 0000000000000001 R14: ffff888076fa7338 R15: 1ffff9200003c1a6
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561d47e10b58 CR3: 000000000c48e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __netns_tracker_free include/net/net_namespace.h:348 [inline]
 __sk_destruct+0x67a/0x750 net/core/sock.c:2164
 sk_destruct net/core/sock.c:2181 [inline]
 __sk_free+0x175/0x460 net/core/sock.c:2192
 sk_free+0x7c/0xa0 net/core/sock.c:2203
 sock_put include/net/sock.h:1991 [inline]
 tcp_write_timer+0x24b/0x2b0 net/ipv4/tcp_timer.c:644
 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700
 expire_timers+0x2c6/0x5c0 kernel/time/timer.c:1751
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1fb/0xadc kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:113 [inline]
RIP: 0010:acpi_idle_do_entry+0x1fd/0x2a0 drivers/acpi/processor_idle.c:570
Code: 89 de e8 86 ba 77 f7 84 db 75 ac e8 0d be 77 f7 e8 48 40 7e f7 66 90 e8 01 be 77 f7 0f 00 2d aa 1e a8 00 e8 f5 bd 77 f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 b0 ba 77 f7 48 85 db
RSP: 0018:ffffc90000177d10 EFLAGS: 00000293

RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88813fe71d40 RSI: ffffffff8a09949b RDI: 0000000000000000
RBP: ffff888012683064 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffff888012683000 R14: ffff888012683064 R15: ffff88801c4b1804
 acpi_idle_enter+0x368/0x510 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0x1af/0xd40 drivers/cpuidle/cpuidle.c:239
 cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:356
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3f7/0x590 kernel/sched/idle.c:303
 cpu_startup_entry+0x18/0x20 kernel/sched/idle.c:400
 start_secondary+0x256/0x300 arch/x86/kernel/smpboot.c:264
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>
----------------
Code disassembly (best guess):
   0:	89 de                	mov    %ebx,%esi
   2:	e8 86 ba 77 f7       	callq  0xf777ba8d
   7:	84 db                	test   %bl,%bl
   9:	75 ac                	jne    0xffffffb7
   b:	e8 0d be 77 f7       	callq  0xf777be1d
  10:	e8 48 40 7e f7       	callq  0xf77e405d
  15:	66 90                	xchg   %ax,%ax
  17:	e8 01 be 77 f7       	callq  0xf777be1d
  1c:	0f 00 2d aa 1e a8 00 	verw   0xa81eaa(%rip)        # 0xa81ecd
  23:	e8 f5 bd 77 f7       	callq  0xf777be1d
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	9c                   	pushfq <-- trapping instruction
  2b:	5b                   	pop    %rbx
  2c:	81 e3 00 02 00 00    	and    $0x200,%ebx
  32:	fa                   	cli
  33:	31 ff                	xor    %edi,%edi
  35:	48 89 de             	mov    %rbx,%rsi
  38:	e8 b0 ba 77 f7       	callq  0xf777baed
  3d:	48 85 db             	test   %rbx,%rbx