------------[ cut here ]------------
WARNING: CPU: 0 PID: 9403 at net/ipv4/route.c:1261 ip_rt_bug+0x29/0x120 net/ipv4/route.c:1261
Modules linked in:
CPU: 0 PID: 9403 Comm: syz-executor.1 Not tainted 6.7.0-rc6-syzkaller-01632-ge9301af385e7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:ip_rt_bug+0x29/0x120 net/ipv4/route.c:1261
Code: 90 f3 0f 1e fa 41 54 55 53 48 89 d3 48 83 ec 08 e8 8c be 98 f8 66 90 e8 85 be 98 f8 be 02 00 00 00 48 89 df e8 68 ce 7a ff 90 <0f> 0b 90 48 83 c4 08 31 c0 5b 5d 41 5c c3 e8 64 be 98 f8 48 8d 7b
RSP: 0018:ffffc900000077c8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88805921b3c0 RCX: ffffc90000007740
RDX: ffff888081ae0000 RSI: ffffffff88eec2f8 RDI: ffffffff8b2f0560
RBP: ffff88805921b3c0 R08: 0000000000000001 R09: fffffbfff23e35e2
R10: ffffffff91f1af17 R11: ffffffff8a84a02a R12: ffff88802751d640
R13: ffff8880172c8d00 R14: 0000000000000000 R15: ffff88805921b418
FS:  00007f505a6b26c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f52a9ef26a5 CR3: 000000003f30a000 CR4: 00000000003506f0
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:129 [inline]
 ip_send_skb net/ipv4/ip_output.c:1489 [inline]
 ip_push_pending_frames+0x125/0x2a0 net/ipv4/ip_output.c:1509
 icmp_push_reply+0x313/0x460 net/ipv4/icmp.c:389
 __icmp_send+0xd76/0x1760 net/ipv4/icmp.c:770
 ipv4_send_dest_unreach net/ipv4/route.c:1241 [inline]
 ipv4_link_failure+0x408/0xb60 net/ipv4/route.c:1248
 dst_link_failure include/net/dst.h:430 [inline]
 arp_error_report+0xcf/0x1c0 net/ipv4/arp.c:296
 neigh_invalidate+0x21c/0x560 net/core/neighbour.c:1059
 neigh_timer_handler+0xbd9/0xf50 net/core/neighbour.c:1146
 call_timer_fn+0x193/0x590 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x764/0xb20 kernel/time/timer.c:2022
 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
 __do_softirq+0x21a/0x8de 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+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:__dev_alloc_name net/core/dev.c:1094 [inline]
RIP: 0010:dev_prep_valid_name.constprop.0+0x223/0x6c0 net/core/dev.c:1136
Code: 01 00 00 48 89 d0 48 c1 e8 03 80 3c 18 00 0f 85 2e 04 00 00 49 8b ad 20 01 00 00 48 8d 7d 10 48 89 f8 48 c1 e8 03 80 3c 18 00 <0f> 85 3e 04 00 00 48 8b 45 10 4c 8d 78 f0 4c 39 fd 0f 84 23 01 00
RSP: 0018:ffffc90017b17260 EFLAGS: 00000246
RAX: 1ffff11003a0c4c2 RBX: dffffc0000000000 RCX: ffffc900046c1000
RDX: ffff88809c69c120 RSI: ffffffff886e7205 RDI: ffff88801d062610
RBP: ffff88801d062600 R08: 0000000000000001 R09: ffffed1005770814
R10: ffff88802bb840a7 R11: 0000000000000001 R12: 000000000000053e
R13: ffff88809c69c000 R14: ffff888082608110 R15: ffff88802bb84000
 dev_get_valid_name net/core/dev.c:1170 [inline]
 register_netdevice+0x3df/0x1da0 net/core/dev.c:10177
 br_dev_newlink+0x27/0x110 net/bridge/br_netlink.c:1562
 rtnl_newlink_create net/core/rtnetlink.c:3515 [inline]
 __rtnl_newlink+0x118a/0x1940 net/core/rtnetlink.c:3735
 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3748
 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6615
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543
 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline]
 netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367
 netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0xd5/0x180 net/socket.c:745
 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584
 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638
 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f505987cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f505a6b20c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f505999bf80 RCX: 00007f505987cce9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00007f50598c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f505999bf80 R15: 00007ffcd9cec238
 </TASK>
----------------
Code disassembly (best guess):
   0:	01 00                	add    %eax,(%rax)
   2:	00 48 89             	add    %cl,-0x77(%rax)
   5:	d0 48 c1             	rorb   -0x3f(%rax)
   8:	e8 03 80 3c 18       	call   0x183c8010
   d:	00 0f                	add    %cl,(%rdi)
   f:	85 2e                	test   %ebp,(%rsi)
  11:	04 00                	add    $0x0,%al
  13:	00 49 8b             	add    %cl,-0x75(%rcx)
  16:	ad                   	lods   %ds:(%rsi),%eax
  17:	20 01                	and    %al,(%rcx)
  19:	00 00                	add    %al,(%rax)
  1b:	48 8d 7d 10          	lea    0x10(%rbp),%rdi
  1f:	48 89 f8             	mov    %rdi,%rax
  22:	48 c1 e8 03          	shr    $0x3,%rax
  26:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
* 2a:	0f 85 3e 04 00 00    	jne    0x46e <-- trapping instruction
  30:	48 8b 45 10          	mov    0x10(%rbp),%rax
  34:	4c 8d 78 f0          	lea    -0x10(%rax),%r15
  38:	4c 39 fd             	cmp    %r15,%rbp
  3b:	0f                   	.byte 0xf
  3c:	84 23                	test   %ah,(%rbx)
  3e:	01 00                	add    %eax,(%rax)