------------[ cut here ]------------
WARNING: CPU: 0 PID: 17495 at net/core/flow_dissector.c:1107 __skb_flow_dissect+0xb05/0x6e70 net/core/flow_dissector.c:1102
Modules linked in:
CPU: 0 PID: 17495 Comm: syz.8.3021 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:__skb_flow_dissect+0xb05/0x6e70 net/core/flow_dissector.c:1107
Code: c6 e8 1f 4a 04 f9 85 db 0f 84 9a 06 00 00 80 3d cb 7d d3 06 01 0f 85 c0 06 00 00 e8 55 46 04 f9 e9 d5 f9 ff ff e8 4b 46 04 f9 <0f> 0b e8 14 c7 0f 02 89 c3 31 ff 89 c6 e8 e9 49 04 f9 85 db 74 18
RSP: 0018:ffffc900000069a0 EFLAGS: 00010246
RAX: ffffffff88834a65 RBX: 0000000000000000 RCX: ffff88807e638000
RDX: 0000000000000100 RSI: ffffffff8b1d5140 RDI: ffffffff8b1d5100
RBP: ffffc90000006fb8 R08: dffffc0000000000 R09: 1ffffffff23fe2a0
R10: dffffc0000000000 R11: fffffbfff23fe2a1 R12: ffffffff8f6cccb8
R13: 1ffffffff1ed9998 R14: ffffffff8f6cccc2 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2eb13ff8 CR3: 000000000dd32000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 skb_flow_dissect_flow_keys include/linux/skbuff.h:1544 [inline]
 ___skb_get_hash net/core/flow_dissector.c:1806 [inline]
 __skb_get_hash+0xf3/0x2e0 net/core/flow_dissector.c:1871
 skb_get_hash include/linux/skbuff.h:1586 [inline]
 nft_trace_init+0x1bb/0x420 net/netfilter/nf_tables_trace.c:316
 nft_do_chain+0x1523/0x1620 net/netfilter/nf_tables_core.c:268
 nft_do_chain_ipv4+0x160/0x230 net/netfilter/nft_chain_filter.c:23
 nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
 nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
 nf_hook+0x228/0x390 include/linux/netfilter.h:259
 __ip_local_out+0x4db/0x5f0 net/ipv4/ip_output.c:118
 ip_local_out+0x2a/0x130 net/ipv4/ip_output.c:127
 iptunnel_xmit+0x4d0/0x910 net/ipv4/ip_tunnel_core.c:82
 udp_tunnel_xmit_skb+0x22f/0x380 net/ipv4/udp_tunnel_core.c:172
 tipc_udp_xmit+0x861/0xb40 net/tipc/udp_media.c:198
 tipc_bearer_xmit_skb+0x2ad/0x3f0 net/tipc/bearer.c:576
 tipc_disc_timeout+0x5f7/0x750 net/tipc/discover.c:340
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x570/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lock_is_held_type+0x13e/0x190 kernel/locking/lockdep.c:5866
Code: 75 40 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 46 41 f7 c5 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 3c 89 e8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc90015077660 EFLAGS: 00000206
RAX: 51775cd66d4fcb00 RBX: ffff88807e638000 RCX: 51775cd66d4fcb00
RDX: 0000000000000000 RSI: ffffffff8acae160 RDI: ffffffff8b1d5160
RBP: 0000000000000001 R08: dffffc0000000000 R09: 1ffffffff23fe2a0
R10: dffffc0000000000 R11: fffffbfff23fe2a1 R12: 0000000000000001
R13: 0000000000000246 R14: ffffffff8df320e0 R15: ffff88807e638b10
 lookup_page_ext mm/page_ext.c:240 [inline]
 page_ext_get+0x193/0x2b0 mm/page_ext.c:509
 page_table_check_clear+0x4a/0x6a0 mm/page_table_check.c:74
 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
 zap_pte_range mm/memory.c:1429 [inline]
 zap_pmd_range mm/memory.c:1571 [inline]
 zap_pud_range mm/memory.c:1600 [inline]
 zap_p4d_range mm/memory.c:1621 [inline]
 unmap_page_range+0x1c35/0x32f0 mm/memory.c:1642
 unmap_vmas+0x286/0x3f0 mm/memory.c:1732
 exit_mmap+0x238/0xb90 mm/mmap.c:3302
 __mmput+0x118/0x3a0 kernel/fork.c:1362
 exit_mm+0x23f/0x340 kernel/exit.c:576
 do_exit+0x909/0x2530 kernel/exit.c:877
 do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
 __do_sys_exit_group kernel/exit.c:1043 [inline]
 __se_sys_exit_group kernel/exit.c:1041 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1041
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb9e559e2d9
Code: Unable to access opcode bytes at 0x7fb9e559e2af.
RSP: 002b:00007fffc049e858 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb9e559e2d9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffc049e8bc R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000283
R13: 00000000000927c0 R14: 00000000000ae17f R15: 00007fffc049e910
 </TASK>
----------------
Code disassembly (best guess):
   0:	75 40                	jne    0x42
   2:	48 c7 04 24 00 00 00 	movq   $0x0,(%rsp)
   9:	00
   a:	9c                   	pushf
   b:	8f 04 24             	pop    (%rsp)
   e:	f7 04 24 00 02 00 00 	testl  $0x200,(%rsp)
  15:	75 46                	jne    0x5d
  17:	41 f7 c5 00 02 00 00 	test   $0x200,%r13d
  1e:	74 01                	je     0x21
  20:	fb                   	sti
  21:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  28:	00 00
* 2a:	48 3b 44 24 08       	cmp    0x8(%rsp),%rax <-- trapping instruction
  2f:	75 3c                	jne    0x6d
  31:	89 e8                	mov    %ebp,%eax
  33:	48 83 c4 10          	add    $0x10,%rsp
  37:	5b                   	pop    %rbx
  38:	41 5c                	pop    %r12
  3a:	41 5d                	pop    %r13
  3c:	41 5e                	pop    %r14
  3e:	41 5f                	pop    %r15