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WARNING: net/ipv4/route.c:1275 at ip_rt_bug+0x2d/0x140 net/ipv4/route.c:1275, CPU#0: syz.5.1102/9427
Modules linked in:
CPU: 0 UID: 0 PID: 9427 Comm: syz.5.1102 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ip_rt_bug+0x2d/0x140 net/ipv4/route.c:1275
Code: fa 55 41 57 41 56 41 55 41 54 53 48 89 d3 e8 7a e0 bb f7 66 90 e8 73 e0 bb f7 31 ff 48 89 de ba 02 00 00 00 e8 64 61 6a ff 90 <0f> 0b 90 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 49
RSP: 0018:ffffc90000007738 EFLAGS: 00010296
RAX: cb78d708180f0300 RBX: ffff888037180640 RCX: 0000000000000302
RDX: 0000000000000002 RSI: ffffffff8def18d2 RDI: ffffffff8c27a480
RBP: 0000000000000001 R08: ffffffff901172b7 R09: 1ffffffff2022e56
R10: dffffc0000000000 R11: fffffbfff2022e57 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888037180640 R15: ffff88801bb33480
FS:  00007f9bb55316c0(0000) GS:ffff888125466000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000040 CR3: 000000005d14e000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 ip_local_out net/ipv4/ip_output.c:131 [inline]
 ip_send_skb net/ipv4/ip_output.c:1508 [inline]
 ip_push_pending_frames+0xbe/0x150 net/ipv4/ip_output.c:1528
 __icmp_send+0x118d/0x1590 net/ipv4/icmp.c:1000
 ipv4_send_dest_unreach net/ipv4/route.c:1255 [inline]
 ipv4_link_failure+0x66c/0xa70 net/ipv4/route.c:1262
 dst_link_failure include/net/dst.h:438 [inline]
 arp_error_report+0x118/0x160 net/ipv4/arp.c:297
 neigh_invalidate+0x235/0x460 net/core/neighbour.c:1080
 neigh_timer_handler+0xb99/0x11e0 net/core/neighbour.c:1172
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_flush_one_record arch/x86/include/asm/irqflags.h:-1 [inline]
RIP: 0010:console_flush_all+0x801/0xb20 kernel/printk/printk.c:3343
Code: ff ff e8 22 eb 20 00 90 0f 0b 90 e9 85 fc ff ff e8 14 eb 20 00 e8 0f 71 08 0a 48 85 db 74 c0 e8 05 eb 20 00 fb 48 8b 5c 24 08 <48> 8b 44 24 20 42 80 3c 20 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 d6
RSP: 0018:ffffc900034a6920 EFLAGS: 00000287
RAX: ffffffff81a4a18b RBX: ffffc900034a6a80 RCX: 0000000000080000
RDX: ffffc9001ac2f000 RSI: 0000000000003b1d RDI: 0000000000003b1e
RBP: ffffc900034a6a30 R08: ffffffff901172b7 R09: 1ffffffff2022e56
R10: dffffc0000000000 R11: fffffbfff2022e57 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8f00a4a0
 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline]
 console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413
 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479
 _printk+0xdd/0x130 kernel/printk/printk.c:2504
 __nla_validate_parse+0x25d4/0x2dc0 lib/nlattr.c:647
 __nla_parse+0x40/0x60 lib/nlattr.c:732
 __nlmsg_parse include/net/netlink.h:789 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:830 [inline]
 rtnl_newlink+0x202/0x1be0 net/core/rtnetlink.c:3977
 rtnetlink_rcv_msg+0x7d5/0xbe0 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0xa68/0xad0 net/socket.c:2592
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646
 __sys_sendmmsg+0x27c/0x4e0 net/socket.c:2735
 __do_sys_sendmmsg net/socket.c:2762 [inline]
 __se_sys_sendmmsg net/socket.c:2759 [inline]
 __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2759
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9bb459c629
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9bb5531028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f9bb4815fa0 RCX: 00007f9bb459c629
RDX: 040000000000009f RSI: 00002000000002c0 RDI: 0000000000000003
RBP: 00007f9bb4632b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9bb4816038 R14: 00007f9bb4815fa0 R15: 00007ffff06dbdb8
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	ff                   	ljmp   (bad)
   1:	e8 22 eb 20 00       	call   0x20eb28
   6:	90                   	nop
   7:	0f 0b                	ud2
   9:	90                   	nop
   a:	e9 85 fc ff ff       	jmp    0xfffffc94
   f:	e8 14 eb 20 00       	call   0x20eb28
  14:	e8 0f 71 08 0a       	call   0xa087128
  19:	48 85 db             	test   %rbx,%rbx
  1c:	74 c0                	je     0xffffffde
  1e:	e8 05 eb 20 00       	call   0x20eb28
  23:	fb                   	sti
  24:	48 8b 5c 24 08       	mov    0x8(%rsp),%rbx
* 29:	48 8b 44 24 20       	mov    0x20(%rsp),%rax <-- trapping instruction
  2e:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  33:	4c 8b 74 24 18       	mov    0x18(%rsp),%r14
  38:	74 08                	je     0x42
  3a:	4c 89 f7             	mov    %r14,%rdi
  3d:	e8                   	.byte 0xe8
  3e:	d6                   	(bad)