------------[ cut here ]------------
WARNING: CPU: 0 PID: 4207 at mm/maccess.c:226 copy_from_user_nofault+0x15c/0x1c0
Modules linked in:
CPU: 0 PID: 4207 Comm: kworker/0:4 Not tainted 5.15.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events iterate_cleanup_work
RIP: 0010:copy_from_user_nofault+0x15c/0x1c0 mm/maccess.c:226
Code: db 48 c7 c0 f2 ff ff ff 48 0f 44 c5 eb 0c e8 ab ba d5 ff 48 c7 c0 f2 ff ff ff 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 94 ba d5 ff <0f> 0b e9 1e ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c ef fe ff
RSP: 0018:ffffc900000079f0 EFLAGS: 00010246
RAX: ffffffff81aacafc RBX: 0000000000000000 RCX: ffff888062523b80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff81aaca0d R09: ffffed100c4a4771
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffc90000007a68
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb60e474bac CR3: 000000005e897000 CR4: 00000000003506f0
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+0xe4/0x180 kernel/trace/bpf_trace.c:277
 bpf_prog_3d2613b5dfc7747f+0x32/0x8f8
 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+0x1d1/0x380 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+0x1ce/0x1f0 mm/slub.c:3516
 rcu_do_batch kernel/rcu/tree.c:2523 [inline]
 rcu_core+0xa15/0x1650 kernel/rcu/tree.c:2763
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 __do_softirq kernel/softirq.c:592 [inline]
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x157/0x240 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:nf_ct_iterate_cleanup+0x84/0x3b0 net/netfilter/nf_conntrack_core.c:2381
Code: 0f 84 16 03 00 00 49 bc 00 00 00 00 00 fc ff df 89 e8 41 89 ee 25 ff 03 00 00 48 c1 e0 06 48 8d 80 80 4a 86 8c 48 89 44 24 08 <4c> 89 34 24 4a 8d 1c f5 00 00 00 00 48 03 1d c1 89 6f 05 49 89 de
RSP: 0018:ffffc9000310faf0 EFLAGS: 00000206
RAX: ffffffff8c871080 RBX: ffff88802bd7f8b8 RCX: ffff888062523b80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 000000000002ff18 R08: ffffffff889b98ae R09: fffffbfff2131833
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffc9000310fb80 R14: 000000000002ff18 R15: ffffffff889b9ba0
 nf_ct_iterate_cleanup_net+0x15e/0x1d0 net/netfilter/nf_conntrack_core.c:2465
 iterate_cleanup_work+0x63/0x110 net/netfilter/nf_nat_masquerade.c:83
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
----------------
Code disassembly (best guess):
   0:	0f 84 16 03 00 00    	je     0x31c
   6:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
   d:	fc ff df
  10:	89 e8                	mov    %ebp,%eax
  12:	41 89 ee             	mov    %ebp,%r14d
  15:	25 ff 03 00 00       	and    $0x3ff,%eax
  1a:	48 c1 e0 06          	shl    $0x6,%rax
  1e:	48 8d 80 80 4a 86 8c 	lea    -0x7379b580(%rax),%rax
  25:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
* 2a:	4c 89 34 24          	mov    %r14,(%rsp) <-- trapping instruction
  2e:	4a 8d 1c f5 00 00 00 	lea    0x0(,%r14,8),%rbx
  35:	00
  36:	48 03 1d c1 89 6f 05 	add    0x56f89c1(%rip),%rbx        # 0x56f89fe
  3d:	49 89 de             	mov    %rbx,%r14