------------[ cut here ]------------
WARNING: CPU: 1 PID: 1111 at mm/maccess.c:226 copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Modules linked in:
CPU: 1 PID: 1111 Comm: kworker/1:2 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events iterate_cleanup_work
RIP: 0010:copy_from_user_nofault+0x160/0x1c0 mm/maccess.c:226
Code: 24 45 31 f6 31 ff 89 de e8 bd ea d7 ff 85 db 48 c7 c0 f2 ff ff ff 49 0f 44 c6 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 40 e7 d7 ff <0f> 0b e9 1c ff ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c ea fe
RSP: 0018:ffffc90000dd0718 EFLAGS: 00010246
RAX: ffffffff819fd630 RBX: 0000000000000000 RCX: ffff888020fe9dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed10041fd3b9
R10: ffffed10041fd3b9 R11: 1ffff110041fd3b8 R12: ffff888020feb548
R13: 00007ffffffff000 R14: ffffc90000dd0788 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f498c16e2d0 CR3: 000000000be8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 bpf_probe_read_user_common kernel/trace/bpf_trace.c:157 [inline]
 ____bpf_probe_read_compat kernel/trace/bpf_trace.c:281 [inline]
 bpf_probe_read_compat+0xdd/0x170 kernel/trace/bpf_trace.c:277
 bpf_prog_3d2613b5dfc7747f+0x32/0x72c
 bpf_dispatcher_nop_func include/linux/bpf.h:790 [inline]
 __bpf_prog_run include/linux/filter.h:628 [inline]
 bpf_prog_run include/linux/filter.h:635 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:1878 [inline]
 bpf_trace_run3+0x17e/0x320 kernel/trace/bpf_trace.c:1916
 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
 trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
 kmem_cache_free+0x1e7/0x210 mm/slub.c:3516
 ip_rcv_finish_core+0xfec/0x1bc0 net/ipv4/ip_input.c:422
 ip_rcv_finish+0x141/0x270 net/ipv4/ip_input.c:445
 NF_HOOK+0x2d6/0x360 include/linux/netfilter.h:302
 __netif_receive_skb_one_core net/core/dev.c:5524 [inline]
 __netif_receive_skb+0xcc/0x290 net/core/dev.c:5638
 process_backlog+0x364/0x780 net/core/dev.c:6515
 __napi_poll+0xc0/0x430 net/core/dev.c:7074
 napi_poll net/core/dev.c:7141 [inline]
 net_rx_action+0x4a8/0x9c0 net/core/dev.c:7231
 handle_softirqs+0x328/0x820 kernel/softirq.c:558
 __do_softirq kernel/softirq.c:592 [inline]
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:641
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:get_next_corpse net/netfilter/nf_conntrack_core.c:2332 [inline]
RIP: 0010:nf_ct_iterate_cleanup+0x363/0x3c0 net/netfilter/nf_conntrack_core.c:2381
Code: 8b 7c 24 08 e8 ce d5 9b 01 e8 19 81 ff ff 48 c7 c7 60 54 03 8b be 39 09 00 00 31 d2 e8 46 79 44 f9 2e 2e 2e 31 c0 48 8b 1c 24 <ff> c3 3b 1d a9 dd 5a 05 73 1f e8 9e 47 69 f9 e9 f3 fc ff ff e8 94
RSP: 0018:ffffc90004617ac8 EFLAGS: 00000293
RAX: ffffffff880e75dc RBX: 0000000000004e45 RCX: ffff888020fe9dc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 1ffff11005584e45 R08: dffffc0000000000 R09: fffffbfff1ff342b
R10: fffffbfff1ff342b R11: 1ffffffff1ff342a R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90004617b60 R15: ffffffff880e7620
 nf_ct_iterate_cleanup_net+0x10f/0x180 net/netfilter/nf_conntrack_core.c:2465
 iterate_cleanup_work+0x66/0x120 net/netfilter/nf_nat_masquerade.c:83
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 7c 24 08          	mov    0x8(%rsp),%edi
   4:	e8 ce d5 9b 01       	call   0x19bd5d7
   9:	e8 19 81 ff ff       	call   0xffff8127
   e:	48 c7 c7 60 54 03 8b 	mov    $0xffffffff8b035460,%rdi
  15:	be 39 09 00 00       	mov    $0x939,%esi
  1a:	31 d2                	xor    %edx,%edx
  1c:	e8 46 79 44 f9       	call   0xf9447967
  21:	2e 2e 2e 31 c0       	cs cs cs xor %eax,%eax
  26:	48 8b 1c 24          	mov    (%rsp),%rbx
* 2a:	ff c3                	inc    %ebx <-- trapping instruction
  2c:	3b 1d a9 dd 5a 05    	cmp    0x55adda9(%rip),%ebx        # 0x55adddb
  32:	73 1f                	jae    0x53
  34:	e8 9e 47 69 f9       	call   0xf96947d7
  39:	e9 f3 fc ff ff       	jmp    0xfffffd31
  3e:	e8                   	.byte 0xe8
  3f:	94                   	xchg   %eax,%esp