------------[ cut here ]------------
WARNING: CPU: 0 PID: 24112 at net/ipv4/route.c:1241 ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1241
Modules linked in:
CPU: 0 UID: 0 PID: 24112 Comm: syz.5.4529 Not tainted 6.12.0-rc6-syzkaller-00279-gde2f378f2b77 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1241
Code: 1e fa 41 57 41 56 41 55 41 54 53 48 89 d3 e8 4b 24 7c f7 66 90 e8 44 24 7c f7 31 ff 48 89 de ba 02 00 00 00 e8 95 b4 6a 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:ffffc90000007680 EFLAGS: 00010286
RAX: 3476c1f1d9bb5800 RBX: ffff8880353d1500 RCX: ffffffff8170bf9a
RDX: dffffc0000000000 RSI: ffffffff8c0acac0 RDI: ffffffff8c6035e0
RBP: 0000000000000001 R08: ffffffff9429889f R09: ffffffff8a18b5cb
R10: dffffc0000000000 R11: fffffbfff2853114 R12: dffffc0000000000
R13: ffffc900000078f8 R14: ffff88806016d880 R15: ffff88801b3d1b00
FS:  00007ff71e9a96c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14bf068704 CR3: 000000005cb92000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ip_local_out net/ipv4/ip_output.c:130 [inline]
 ip_send_skb net/ipv4/ip_output.c:1496 [inline]
 ip_push_pending_frames+0xbf/0x150 net/ipv4/ip_output.c:1516
 __icmp_send+0x1017/0x15c0 net/ipv4/icmp.c:780
 ipv4_send_dest_unreach net/ipv4/route.c:1221 [inline]
 ipv4_link_failure+0x62f/0xa10 net/ipv4/route.c:1228
 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:1061
 neigh_timer_handler+0x8a5/0xfe0 net/core/neighbour.c:1148
 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794
 expire_timers kernel/time/timer.c:1845 [inline]
 __run_timers kernel/time/timer.c:2419 [inline]
 __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430
 run_timer_base kernel/time/timer.c:2439 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449
 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
 __do_softirq kernel/softirq.c:588 [inline]
 invoke_softirq kernel/softirq.c:428 [inline]
 __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 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:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:222
Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc9000d79f958 EFLAGS: 00000246
RAX: ffffffff8980f574 RBX: ffffc9000d79fc00 RCX: ffff88802628bc00
RDX: ffffc9000bfeb000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000d79fa70 R08: ffffffff8980f486 R09: 1ffff92001af3f3e
R10: dffffc0000000000 R11: fffff52001af3f3f R12: 0000000000000000
R13: ffffc9000d79f9c0 R14: ffffc9000d79fd08 R15: 1ffff92001af3fa1
 __copy_msghdr net/socket.c:2508 [inline]
 copy_msghdr_from_user+0x3b4/0x680 net/socket.c:2540
 recvmsg_copy_msghdr net/socket.c:2792 [inline]
 ___sys_recvmsg net/socket.c:2864 [inline]
 do_recvmmsg+0x3f9/0xad0 net/socket.c:2962
 __sys_recvmmsg net/socket.c:3041 [inline]
 __do_sys_recvmmsg net/socket.c:3064 [inline]
 __se_sys_recvmmsg net/socket.c:3057 [inline]
 __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3057
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff71db7e719
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff71e9a9038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007ff71dd36058 RCX: 00007ff71db7e719
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007ff71dbf139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff71dd36058 R15: 00007ffc2cdffe08
 </TASK>
----------------
Code disassembly (best guess):
   0:	ff 00                	incl   (%rax)
   2:	74 11                	je     0x15
   4:	81 fa 00 01 00 00    	cmp    $0x100,%edx
   a:	75 35                	jne    0x41
   c:	83 b9 1c 16 00 00 00 	cmpl   $0x0,0x161c(%rcx)
  13:	74 2c                	je     0x41
  15:	8b 91 f8 15 00 00    	mov    0x15f8(%rcx),%edx
  1b:	83 fa 02             	cmp    $0x2,%edx
  1e:	75 21                	jne    0x41
  20:	48 8b 91 00 16 00 00 	mov    0x1600(%rcx),%rdx
  27:	48 8b 32             	mov    (%rdx),%rsi
* 2a:	48 8d 7e 01          	lea    0x1(%rsi),%rdi <-- trapping instruction
  2e:	8b 89 fc 15 00 00    	mov    0x15fc(%rcx),%ecx
  34:	48 39 cf             	cmp    %rcx,%rdi
  37:	73 08                	jae    0x41
  39:	48 89 3a             	mov    %rdi,(%rdx)
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	44                   	rex.R
  3f:	f2                   	repnz