------------[ cut here ]------------
WARNING: CPU: 0 PID: 27913 at net/ipv4/route.c:1259 kfree_skb include/linux/skbuff.h:1237 [inline]
WARNING: CPU: 0 PID: 27913 at net/ipv4/route.c:1259 ip_rt_bug+0x28/0x120 net/ipv4/route.c:1258
Modules linked in:
CPU: 0 PID: 27913 Comm: syz-executor.4 Not tainted 6.5.0-rc5-syzkaller-00231-gde4c5efeeca7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:ip_rt_bug+0x28/0x120 net/ipv4/route.c:1259
Code: 00 00 f3 0f 1e fa 41 54 55 53 48 89 d3 48 83 ec 08 e8 5c a9 e0 f8 66 90 e8 55 a9 e0 f8 be 02 00 00 00 48 89 df e8 08 3a 7c ff <0f> 0b 48 83 c4 08 31 c0 5b 5d 41 5c c3 e8 36 a9 e0 f8 48 8d 7b 10
RSP: 0018:ffffc900000077c8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888032cab500 RCX: 0000000000000100
RDX: ffff888077070000 RSI: ffffffff88a55f58 RDI: ffffffff8ac811a0
RBP: ffff888032cab500 R08: 0000000000000001 R09: fffffbfff2309de2
R10: ffffffff9184ef17 R11: ffffffff8a35e628 R12: ffff88807af98000
R13: ffff8881400f8d00 R14: 0000000000000000 R15: ffff888032cab558
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd38e79d988 CR3: 0000000049b37000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dst_output include/net/dst.h:458 [inline]
 ip_local_out net/ipv4/ip_output.c:127 [inline]
 ip_send_skb net/ipv4/ip_output.c:1486 [inline]
 ip_push_pending_frames+0x120/0x2a0 net/ipv4/ip_output.c:1506
 icmp_push_reply+0x30f/0x450 net/ipv4/icmp.c:389
 __icmp_send+0xccc/0x17e0 net/ipv4/icmp.c:770
 ipv4_send_dest_unreach net/ipv4/route.c:1239 [inline]
 ipv4_link_failure+0x5ba/0x9f0 net/ipv4/route.c:1246
 dst_link_failure include/net/dst.h:437 [inline]
 arp_error_report+0xcf/0x1c0 net/ipv4/arp.c:296
 neigh_invalidate+0x21c/0x560 net/core/neighbour.c:1048
 neigh_timer_handler+0xbd0/0xf50 net/core/neighbour.c:1135
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb10 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x218/0x965 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:page_table_check_clear.part.0+0x1ee/0x7f0 mm/page_table_check.c:81
Code: 00 00 48 c7 c0 00 25 1b 92 49 bf 00 00 00 00 00 fc ff df 48 c1 e8 03 4c 01 f8 48 89 04 24 e8 79 53 a1 ff 48 8b 1d 12 55 d1 0a <31> ff 44 89 ee e8 98 4e a1 ff 4c 01 e3 45 84 ed 0f 84 89 01 00 00
RSP: 0018:ffffc9000654f608 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000040 RCX: 0000000000000000
RDX: ffff888077070000 RSI: ffffffff81e4b527 RDI: ffffea0000c0f918
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000000519b R12: ffff888014411820
R13: 0000000000000000 R14: 0000000000000001 R15: dffffc0000000000
 page_table_check_clear include/linux/mmzone.h:2010 [inline]
 __page_table_check_pte_clear+0x24f/0x2a0 mm/page_table_check.c:161
 page_table_check_pte_clear include/linux/page_table_check.h:55 [inline]
 ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1087 [inline]
 zap_pte_range mm/memory.c:1431 [inline]
 zap_pmd_range mm/memory.c:1570 [inline]
 zap_pud_range mm/memory.c:1599 [inline]
 zap_p4d_range mm/memory.c:1620 [inline]
 unmap_page_range+0x1dbf/0x32e0 mm/memory.c:1641
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1687
 unmap_vmas+0x267/0x3c0 mm/memory.c:1726
 exit_mmap+0x1a7/0x960 mm/mmap.c:3203
 __mmput+0x12a/0x4d0 kernel/fork.c:1348
 mmput+0x62/0x70 kernel/fork.c:1370
 exit_mm kernel/exit.c:567 [inline]
 do_exit+0x9b4/0x2a20 kernel/exit.c:861
 do_group_exit+0xd4/0x2a0 kernel/exit.c:1024
 get_signal+0x23ea/0x2770 kernel/signal.c:2881
 arch_do_signal_or_restart+0x89/0x5f0 arch/x86/kernel/signal.c:308
 exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
 exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe2d5a7cae9
Code: Unable to access opcode bytes at 0x7fe2d5a7cabf.
RSP: 002b:00007fe2d6758178 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fe2d5b9bf88 RCX: 00007fe2d5a7cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fe2d5b9bf88
RBP: 00007fe2d5b9bf80 R08: 00007fe2d67586c0 R09: 00007fe2d67586c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe2d5b9bf8c
R13: 000000000000000b R14: 00007ffda5d3f130 R15: 00007ffda5d3f218
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	48 c7 c0 00 25 1b 92 	mov    $0xffffffff921b2500,%rax
   9:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  10:	fc ff df
  13:	48 c1 e8 03          	shr    $0x3,%rax
  17:	4c 01 f8             	add    %r15,%rax
  1a:	48 89 04 24          	mov    %rax,(%rsp)
  1e:	e8 79 53 a1 ff       	call   0xffa1539c
  23:	48 8b 1d 12 55 d1 0a 	mov    0xad15512(%rip),%rbx        # 0xad1553c
* 2a:	31 ff                	xor    %edi,%edi <-- trapping instruction
  2c:	44 89 ee             	mov    %r13d,%esi
  2f:	e8 98 4e a1 ff       	call   0xffa14ecc
  34:	4c 01 e3             	add    %r12,%rbx
  37:	45 84 ed             	test   %r13b,%r13b
  3a:	0f 84 89 01 00 00    	je     0x1c9