------------[ cut here ]------------
WARNING: CPU: 1 PID: 5857 at net/ipv4/route.c:1254 ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1254
Modules linked in:
CPU: 1 UID: 0 PID: 5857 Comm: syz-executor Not tainted 6.12.0-syzkaller-10684-gf1cd565ce577 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1254
Code: 1e fa 41 57 41 56 41 55 41 54 53 48 89 d3 e8 4b 95 6b f7 66 90 e8 44 95 6b f7 31 ff 48 89 de ba 02 00 00 00 e8 35 3e 6a ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc f3 0f 1e
RSP: 0018:ffffc90000a18680 EFLAGS: 00010286
RAX: 4b4ab44535f86c00 RBX: ffff8880326e2a00 RCX: ffffffff8171932a
RDX: dffffc0000000000 RSI: ffffffff8c0ad980 RDI: ffffffff8c6158a0
RBP: 0000000000000001 R08: ffffffff9432392f R09: 1ffffffff2864725
R10: dffffc0000000000 R11: fffffbfff2864726 R12: dffffc0000000000
R13: ffffc90000a188f8 R14: ffff888035280000 R15: ffff88801ad321c0
FS:  000055558bd48500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f34e50756c0 CR3: 0000000033b38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ip_local_out net/ipv4/ip_output.c:130 [inline]
 ip_send_skb net/ipv4/ip_output.c:1505 [inline]
 ip_push_pending_frames+0xbf/0x150 net/ipv4/ip_output.c:1525
 __icmp_send+0x1013/0x15c0 net/ipv4/icmp.c:779
 ipv4_send_dest_unreach net/ipv4/route.c:1234 [inline]
 ipv4_link_failure+0x62f/0xa10 net/ipv4/route.c:1241
 dst_link_failure include/net/dst.h:429 [inline]
 arp_error_report+0x114/0x160 net/ipv4/arp.c:296
 neigh_invalidate+0x247/0x470 net/core/neighbour.c:1010
 neigh_timer_handler+0x8a5/0xfe0 net/core/neighbour.c:1097
 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1793
 expire_timers kernel/time/timer.c:1844 [inline]
 __run_timers kernel/time/timer.c:2418 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
 run_timer_base kernel/time/timer.c:2439 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:655
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:check_preemption_disabled+0x7/0x120 lib/smp_processor_id.c:13
Code: c6 80 58 61 8c eb 1c 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 41 57 41 56 41 54 53 <48> 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 1d 0c
RSP: 0018:ffffc900039c7160 EFLAGS: 00000282

RAX: 0000000000000000 RBX: 0000000000000180 RCX: ffff88802b051e00
RDX: ffff88802b051e00 RSI: ffffffff8c615880 RDI: ffffffff8c615840
RBP: 0000000000000001 R08: ffffffff820d7c67 R09: 1ffffffff2864710
R10: dffffc0000000000 R11: fffffbfff2864711 R12: dffffc0000000000
R13: 0000000000066d62 R14: ffffffff820d7c36 R15: ffff88813fffa6c0
 rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
 rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:737
 rcu_read_lock_sched include/linux/rcupdate.h:942 [inline]
 pfn_valid+0x130/0x450 include/linux/mmzone.h:2048
 page_table_check_set+0x22/0x540 mm/page_table_check.c:110
 __page_table_check_ptes_set+0x30f/0x410 mm/page_table_check.c:225
 page_table_check_ptes_set include/linux/page_table_check.h:74 [inline]
 set_ptes include/linux/pgtable.h:288 [inline]
 __copy_present_ptes mm/memory.c:967 [inline]
 copy_present_ptes mm/memory.c:1050 [inline]
 copy_pte_range mm/memory.c:1173 [inline]
 copy_pmd_range+0x457c/0x7eb0 mm/memory.c:1261
 copy_pud_range mm/memory.c:1298 [inline]
 copy_p4d_range mm/memory.c:1322 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1420
 dup_mmap kernel/fork.c:751 [inline]
 dup_mm kernel/fork.c:1695 [inline]
 copy_mm+0x11c7/0x1f90 kernel/fork.c:1744
----------------
Code disassembly (best guess):
   0:	c6 80 58 61 8c eb 1c 	movb   $0x1c,-0x14739ea8(%rax)
   7:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
   e:	00 00 00
  11:	66 90                	xchg   %ax,%ax
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	90                   	nop
  20:	90                   	nop
  21:	90                   	nop
  22:	90                   	nop
  23:	41 57                	push   %r15
  25:	41 56                	push   %r14
  27:	41 54                	push   %r12
  29:	53                   	push   %rbx
* 2a:	48 83 ec 10          	sub    $0x10,%rsp <-- trapping instruction
  2e:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  35:	00 00
  37:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  3c:	65                   	gs
  3d:	8b                   	.byte 0x8b
  3e:	1d                   	.byte 0x1d
  3f:	0c                   	.byte 0xc