------------[ cut here ]------------
WARNING: CPU: 1 PID: 8509 at net/ipv4/route.c:1241 ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1241
Modules linked in:
CPU: 1 UID: 0 PID: 8509 Comm: syz.1.1208 Not tainted 6.12.0-syzkaller-01518-ga5c93bfec0be #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 eb a7 79 f7 66 90 e8 e4 a7 79 f7 31 ff 48 89 de ba 02 00 00 00 e8 65 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: 0000:ffffc90000a18680 EFLAGS: 00010286
RAX: ece995cdd1006f00 RBX: ffff88807dd29500 RCX: ffffffff8170dc6a
RDX: dffffc0000000000 RSI: ffffffff8c0ace20 RDI: ffffffff8c605020
RBP: 0000000000000001 R08: ffffffff942b2927 R09: ffffffff8a1b397b
R10: dffffc0000000000 R11: fffffbfff2856525 R12: dffffc0000000000
R13: ffffc90000a188f8 R14: ffff88807cb40000 R15: ffff888145ea21c0
FS:  0000555580f9a500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c36230b CR3: 000000005d17c000 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:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_cmp8+0x18/0x90 kernel/kcov.c:294
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 4c 8b 04 24 65 48 8b 0c 25 80 d7 03 00 65 8b 05 c0 f3 6e 7e <25> 00 01 ff 00 74 10 3d 00 01 00 00 75 57 83 b9 1c 16 00 00 00 74
RSP: 0000:ffffc90003f576a8 EFLAGS: 00000202
RAX: 0000000080000001 RBX: ffffc90003f578e8 RCX: ffff88802e490000
RDX: ffff88802e490000 RSI: 0000000000000034 RDI: 0000000000000034
RBP: 0000000000000034 R08: ffffffff81cc7f8c R09: 1ffffd40003c058e
R10: dffffc0000000000 R11: fffff940003c058f R12: 1ffff920007eaf1e
R13: ffffc90003f578f2 R14: 0000000000000034 R15: ffffc90003f578e0
 xas_next_entry+0xdc/0x3d0 include/linux/xarray.h:1703
 next_uptodate_folio+0x29/0xa40 mm/filemap.c:3495
 filemap_map_pages+0x1382/0x20d0 mm/filemap.c:3688
 do_fault_around mm/memory.c:5255 [inline]
 do_read_fault mm/memory.c:5288 [inline]
 do_fault mm/memory.c:5431 [inline]
 do_pte_missing mm/memory.c:3965 [inline]
 handle_pte_fault+0x2b98/0x6820 mm/memory.c:5766
 __handle_mm_fault mm/memory.c:5909 [inline]
 handle_mm_fault+0x1053/0x1ad0 mm/memory.c:6077
 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f68c0e5ced6
Code: ff 48 83 e8 01 48 89 d6 bf 01 00 00 00 48 c1 e0 0e 48 c1 ee 06 48 01 c8 48 89 d1 81 e6 ff 3f 00 00 48 c1 e9 03 83 e1 07 d3 e7 <40> 84 bc 06 20 20 00 00 0f 85 27 fd ff ff e9 ce fd ff ff e8 72 54
RSP: 002b:00007ffd9f5d24c0 EFLAGS: 00010202
RAX: 000000110c360000 RBX: 00007f68c1c65720 RCX: 0000000000000003
RDX: ffffffff8100bada RSI: 00000000000002eb RDI: 0000000000000008
RBP: 0000000000000000 R08: 00007f68c1120000 R09: 00007f68c1122000
R10: 000000008100bade R11: 0000000000000000 R12: ffffffff8100b58e
R13: 00007f68c1136018 R14: 0000000000000008 R15: 0000000000000006
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	f3 0f 1e fa          	endbr64
  16:	4c 8b 04 24          	mov    (%rsp),%r8
  1a:	65 48 8b 0c 25 80 d7 	mov    %gs:0x3d780,%rcx
  21:	03 00
  23:	65 8b 05 c0 f3 6e 7e 	mov    %gs:0x7e6ef3c0(%rip),%eax        # 0x7e6ef3ea
* 2a:	25 00 01 ff 00       	and    $0xff0100,%eax <-- trapping instruction
  2f:	74 10                	je     0x41
  31:	3d 00 01 00 00       	cmp    $0x100,%eax
  36:	75 57                	jne    0x8f
  38:	83 b9 1c 16 00 00 00 	cmpl   $0x0,0x161c(%rcx)
  3f:	74                   	.byte 0x74