------------[ cut here ]------------
WARNING: CPU: 2 PID: 0 at net/ipv4/route.c:1241 ip_rt_bug+0x2b/0x120 net/ipv4/route.c:1241
Modules linked in:
CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.12.0-syzkaller-00233-g9fb2cfa4635a #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ip_rt_bug+0x2b/0x120 net/ipv4/route.c:1241
Code: 0f 1e fa 41 54 55 53 48 89 d3 48 83 ec 08 e8 ec bc 16 f8 66 90 e8 e5 bc 16 f8 ba 02 00 00 00 48 89 de 31 ff e8 86 58 75 ff 90 <0f> 0b 90 48 83 c4 08 31 c0 5b 5d 41 5c c3 cc cc cc cc e8 be bc 16
RSP: 0018:ffffc90000540790 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88801f773cc0 RCX: 1ffffffff2d3b519
RDX: ffff88801b750000 RSI: ffffffff8976002a RDI: ffffffff8bb14d00
RBP: ffff88801f773cc0 R08: 0000000000000001 R09: fffffbfff2d3339c
R10: ffffffff96999ce7 R11: 0000000000000000 R12: ffff88804e348000
R13: ffff888043a28000 R14: ffff888065a71c00 R15: ffff88801f773d18
FS:  0000000000000000(0000) GS:ffff88802b600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002002c000 CR3: 000000007102c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dst_output include/net/dst.h:450 [inline]
 dst_output include/net/dst.h:448 [inline]
 ip_local_out net/ipv4/ip_output.c:130 [inline]
 ip_send_skb net/ipv4/ip_output.c:1496 [inline]
 ip_push_pending_frames+0x3ad/0x5b0 net/ipv4/ip_output.c:1516
 icmp_push_reply+0x310/0x450 net/ipv4/icmp.c:393
 __icmp_send+0xb88/0x1870 net/ipv4/icmp.c:780
 ipv4_send_dest_unreach net/ipv4/route.c:1221 [inline]
 ipv4_link_failure+0x591/0xb00 net/ipv4/route.c:1228
 dst_link_failure include/net/dst.h:429 [inline]
 arp_error_report+0xcf/0x1d0 net/ipv4/arp.c:296
 neigh_invalidate+0x21e/0x570 net/core/neighbour.c:1061
 neigh_timer_handler+0xbfe/0xf80 net/core/neighbour.c:1148
 call_timer_fn+0x1a0/0x610 kernel/time/timer.c:1794
 expire_timers kernel/time/timer.c:1845 [inline]
 __run_timers+0x6e8/0x930 kernel/time/timer.c:2419
 __run_timer_base kernel/time/timer.c:2430 [inline]
 __run_timer_base kernel/time/timer.c:2423 [inline]
 run_timer_base+0x111/0x190 kernel/time/timer.c:2439
 run_timer_softirq+0x1a/0x40 kernel/time/timer.c:2449
 handle_softirqs+0x213/0x8f0 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu kernel/softirq.c:637 [inline]
 irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 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:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:743
Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 03 09 31 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc90000487e08 EFLAGS: 00000202
RAX: 0000000000a23c45 RBX: 0000000000000002 RCX: ffffffff8b157a59
RDX: 0000000000000000 RSI: ffffffff8b4cca20 RDI: ffffffff8bb14d00
RBP: ffffed10036ea000 R08: 0000000000000001 R09: ffffed10056c7025
R10: ffff88802b63812b R11: 0000000000000000 R12: 0000000000000002
R13: ffff88801b750000 R14: ffffffff901d2c88 R15: 0000000000000000
 default_idle_call+0x6d/0xb0 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x32c/0x3f0 kernel/sched/idle.c:326
 cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:424
 start_secondary+0x222/0x2b0 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13e/0x148
 </TASK>
----------------
Code disassembly (best guess):
   0:	4c 01 c7             	add    %r8,%rdi
   3:	4c 29 c2             	sub    %r8,%rdx
   6:	e9 72 ff ff ff       	jmp    0xffffff7d
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  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:	f3 0f 1e fa          	endbr64
  1f:	eb 07                	jmp    0x28
  21:	0f 00 2d 03 09 31 00 	verw   0x310903(%rip)        # 0x31092b
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	fa                   	cli <-- trapping instruction
  2b:	c3                   	ret
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop