------------[ cut here ]------------
WARNING: CPU: 2 PID: 0 at net/ipv4/route.c:1259 kfree_skb include/linux/skbuff.h:1375 [inline]
WARNING: CPU: 2 PID: 0 at net/ipv4/route.c:1259 ip_rt_bug+0x27/0x120 net/ipv4/route.c:1258
Modules linked in:
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 5.18.0-syzkaller-07496-gd7227785e384 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:ip_rt_bug+0x27/0x120 net/ipv4/route.c:1259
Code: 44 00 00 55 48 89 d5 53 48 83 ec 08 e8 22 e9 aa f9 66 90 e8 1b e9 aa f9 e8 16 e9 aa f9 be 01 00 00 00 48 89 ef e8 69 28 7b ff <0f> 0b 48 83 c4 08 31 c0 5b 5d c3 e8 f9 e8 aa f9 48 8d 7d 10 48 b8
RSP: 0018:ffffc900007b08a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888063d360c0 RCX: 0000000000000100
RDX: ffff888011946080 RSI: ffffffff87cdfc47 RDI: 0000000000000000
RBP: ffff88801d8efd40 R08: 0000000000000001 R09: ffffffff90099927
R10: 0000000000000001 R11: 0000000000000001 R12: ffff888018a9b100
R13: ffff88801d8efd40 R14: 0000000000000000 R15: ffff88801d8efd98
FS:  0000000000000000(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555560c8708 CR3: 000000006390d000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dst_output include/net/dst.h:451 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb net/ipv4/ip_output.c:1571 [inline]
 ip_push_pending_frames+0x125/0x2b0 net/ipv4/ip_output.c:1591
 icmp_push_reply+0x2bc/0x3e0 net/ipv4/icmp.c:384
 __icmp_send+0xb78/0x13e0 net/ipv4/icmp.c:760
 ipv4_send_dest_unreach net/ipv4/route.c:1239 [inline]
 ipv4_link_failure+0x5a6/0x9a0 net/ipv4/route.c:1246
 dst_link_failure include/net/dst.h:430 [inline]
 arp_error_report+0xc7/0x1c0 net/ipv4/arp.c:295
 neigh_invalidate+0x20d/0x560 net/core/neighbour.c:1024
 neigh_timer_handler+0xd47/0x10e0 net/core/neighbour.c:1111
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1474
 expire_timers kernel/time/timer.c:1519 [inline]
 __run_timers.part.0+0x679/0xa80 kernel/time/timer.c:1790
 __run_timers kernel/time/timer.c:1768 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:729
Code: ff ff ff 48 89 df e8 84 ac 4e f8 e9 55 ff ff ff 4c 89 e7 e8 77 ac 4e f8 eb 96 0f 1f 44 00 00 eb 07 0f 00 2d 07 d0 50 00 fb f4 <c3> cc cc cc cc 41 55 41 54 55 48 89 fd 53 e8 62 07 03 f8 e8 6d 15
RSP: 0018:ffffc9000069fe00 EFLAGS: 00000202
RAX: 0000000000432e75 RBX: ffff888011946080 RCX: ffffffff8972e8f1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000002 R08: 0000000000000001 R09: ffff88802cc3b0d3
R10: ffffed100598761a R11: 0000000000000000 R12: ffffed1002328c10
R13: 0000000000000002 R14: ffffffff8dba2bd0 R15: 0000000000000000
 default_idle_call+0x80/0xc0 kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x401/0x590 kernel/sched/idle.c:303
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
 start_secondary+0x21d/0x2b0 arch/x86/kernel/smpboot.c:266
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	48 89 df             	mov    %rbx,%rdi
   3:	e8 84 ac 4e f8       	callq  0xf84eac8c
   8:	e9 55 ff ff ff       	jmpq   0xffffff62
   d:	4c 89 e7             	mov    %r12,%rdi
  10:	e8 77 ac 4e f8       	callq  0xf84eac8c
  15:	eb 96                	jmp    0xffffffad
  17:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1c:	eb 07                	jmp    0x25
  1e:	0f 00 2d 07 d0 50 00 	verw   0x50d007(%rip)        # 0x50d02c
  25:	fb                   	sti
  26:	f4                   	hlt
* 27:	c3                   	retq <-- trapping instruction
  28:	cc                   	int3
  29:	cc                   	int3
  2a:	cc                   	int3
  2b:	cc                   	int3
  2c:	41 55                	push   %r13
  2e:	41 54                	push   %r12
  30:	55                   	push   %rbp
  31:	48 89 fd             	mov    %rdi,%rbp
  34:	53                   	push   %rbx
  35:	e8 62 07 03 f8       	callq  0xf803079c
  3a:	e8                   	.byte 0xe8
  3b:	6d                   	insl   (%dx),%es:(%rdi)
  3c:	15                   	.byte 0x15