------------[ cut here ]------------
WARNING: CPU: 1 PID: 15674 at net/ipv4/route.c:1261 ip_rt_bug+0x2a/0x110 net/ipv4/route.c:1261
Modules linked in:
CPU: 1 PID: 15674 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-05221-gea80e3ed09ab #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:ip_rt_bug+0x2a/0x110 net/ipv4/route.c:1261
Code: f3 0f 1e fa 41 57 41 56 41 55 41 54 53 48 89 d3 e8 1b 27 c5 f7 66 90 e8 14 27 c5 f7 48 89 df be 02 00 00 00 e8 27 80 6e 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:ffffc90000a08680 EFLAGS: 00010286
RAX: 7abd932b33facf00 RBX: ffff888036306c80 RCX: ffffffff81720c2a
RDX: dffffc0000000000 RSI: ffffffff8baac220 RDI: ffffffff8bfec660
RBP: 0000000000000001 R08: ffffffff92cc7597 R09: 1ffffffff2598eb2
R10: dffffc0000000000 R11: fffffbfff2598eb3 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8880322b3980 R15: ffff888016f39380
FS:  000055555987d480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ced3a8000 CR3: 0000000021cd6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ip_local_out net/ipv4/ip_output.c:129 [inline]
 ip_send_skb net/ipv4/ip_output.c:1493 [inline]
 ip_push_pending_frames+0xbf/0x150 net/ipv4/ip_output.c:1513
 __icmp_send+0xfb0/0x1500 net/ipv4/icmp.c:770
 ipv4_send_dest_unreach net/ipv4/route.c:1241 [inline]
 ipv4_link_failure+0x62f/0xa10 net/ipv4/route.c:1248
 dst_link_failure include/net/dst.h:429 [inline]
 arp_error_report+0x114/0x160 net/ipv4/arp.c:296
 neigh_invalidate+0x244/0x470 net/core/neighbour.c:1059
 neigh_timer_handler+0x8a5/0xfb0 net/core/neighbour.c:1146
 call_timer_fn+0x17e/0x600 kernel/time/timer.c:1792
 expire_timers kernel/time/timer.c:1843 [inline]
 __run_timers kernel/time/timer.c:2408 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2419
 run_timer_base kernel/time/timer.c:2428 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2438
 __do_softirq+0x2bc/0x943 kernel/softirq.c:554
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:_compound_head include/linux/page-flags.h:247 [inline]
RIP: 0010:copy_present_pte mm/memory.c:950 [inline]
RIP: 0010:copy_pte_range mm/memory.c:1102 [inline]
RIP: 0010:copy_pmd_range mm/memory.c:1187 [inline]
RIP: 0010:copy_pud_range mm/memory.c:1224 [inline]
RIP: 0010:copy_p4d_range mm/memory.c:1248 [inline]
RIP: 0010:copy_page_range+0x12cc/0x4240 mm/memory.c:1346
Code: 8b 74 24 30 e8 c5 da ff ff 49 89 c7 48 89 44 24 10 48 85 c0 0f 84 41 01 00 00 49 8d 5f 08 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 3a 94 18 00 48 8b 1b 48 89 de 48 83 e6 01 31 ff
RSP: 0018:ffffc9001334f400 EFLAGS: 00000246
RAX: 1ffffd40000f4cd1 RBX: ffffea00007a6688 RCX: ffff888041d2bc00
RDX: 0000000000000000 RSI: 000000000023ffff RDI: 000000000001e99a
RBP: ffffc9001334f8b0 R08: ffffffff81df7b99 R09: 1ffff110045a9018
R10: dffffc0000000000 R11: ffffed10045a9019 R12: ffff88802f2d5000
R13: dffffc0000000000 R14: 1ffff110067d68f0 R15: ffffea00007a6680
 dup_mmap kernel/fork.c:747 [inline]
 dup_mm kernel/fork.c:1687 [inline]
 copy_mm+0x12f5/0x21b0 kernel/fork.c:1736
 copy_process+0x187a/0x3df0 kernel/fork.c:2389
 kernel_clone+0x21e/0x8d0 kernel/fork.c:2796
 __do_sys_clone kernel/fork.c:2939 [inline]
 __se_sys_clone kernel/fork.c:2923 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2923
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f003f27add3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffedf79a518 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f003f27add3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 000055555987d750 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 74 24 30          	mov    0x30(%rsp),%esi
   4:	e8 c5 da ff ff       	call   0xffffdace
   9:	49 89 c7             	mov    %rax,%r15
   c:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
  11:	48 85 c0             	test   %rax,%rax
  14:	0f 84 41 01 00 00    	je     0x15b
  1a:	49 8d 5f 08          	lea    0x8(%r15),%rbx
  1e:	48 89 d8             	mov    %rbx,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
* 2a:	74 08                	je     0x34 <-- trapping instruction
  2c:	48 89 df             	mov    %rbx,%rdi
  2f:	e8 3a 94 18 00       	call   0x18946e
  34:	48 8b 1b             	mov    (%rbx),%rbx
  37:	48 89 de             	mov    %rbx,%rsi
  3a:	48 83 e6 01          	and    $0x1,%rsi
  3e:	31 ff                	xor    %edi,%edi