------------[ cut here ]------------
WARNING: CPU: 1 PID: 15035 at net/ipv4/route.c:1241 ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1241
Modules linked in:
CPU: 1 UID: 0 PID: 15035 Comm: syz.6.1820 Not tainted 6.12.0-syzkaller-00239-gc6d64479d609 #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 bb d2 72 f7 66 90 e8 b4 d2 72 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: 56ab75cc89c7ae00 RBX: ffff88806b3beb40 RCX: ffffffff8170d01a
RDX: dffffc0000000000 RSI: ffffffff8c0acc00 RDI: ffffffff8c611a00
RBP: 0000000000000001 R08: ffffffff942d989f R09: ffffffff8a221e6b
R10: dffffc0000000000 R11: fffffbfff285b314 R12: dffffc0000000000
R13: ffffc90000a188f8 R14: ffff888069da3b00 R15: ffff88801bb4a1c0
FS:  0000000000000000(0003) GS:ffff8880b8700000(0063) knlGS:000000005725d440
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c2bd7d3 CR3: 000000007ed9a000 CR4: 00000000003526f0
DR0: 0000000000000003 DR1: 0000000000000006 DR2: 0000000000000401
DR3: 0000000000000200 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:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5829
Code: 2b 00 74 08 4c 89 f7 e8 ca 7d 8e 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0000:ffffc900042577c0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff9200084af04 RCX: 56ab75cc89c7ae00
RDX: dffffc0000000000 RSI: ffffffff8c0add80 RDI: ffffffff8c611a00
RBP: ffffc90004257918 R08: ffffffff942d9837 R09: 1ffffffff285b306
R10: dffffc0000000000 R11: fffffbfff285b307 R12: 1ffff9200084af00
R13: dffffc0000000000 R14: ffffc90004257820 R15: 0000000000000246
 __might_fault+0xc6/0x120 mm/memory.c:6716
 __clear_user arch/x86/include/asm/uaccess_64.h:181 [inline]
 copy_fpstate_to_sigframe+0x13f/0xdc0 arch/x86/kernel/fpu/signal.c:233
 get_sigframe+0x5d9/0x800 arch/x86/kernel/signal.c:163
 ia32_setup_rt_frame+0x130/0xc80 arch/x86/kernel/signal_32.c:322
 setup_rt_frame arch/x86/kernel/signal.c:244 [inline]
 handle_signal arch/x86/kernel/signal.c:294 [inline]
 arch_do_signal_or_restart+0x4a8/0x860 arch/x86/kernel/signal.c:339
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_int80_emulation+0x12c/0x200 arch/x86/entry/common.c:256
 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:626
RIP: 0023:0xf7fb3579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 002b:00000000f759fafc EFLAGS: 00000206
RAX: 00000000ffffff92 RBX: 00000000f74750a4 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 00000000f759fcd0 RDI: 0000000000000000
RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	2b 00                	sub    (%rax),%eax
   2:	74 08                	je     0xc
   4:	4c 89 f7             	mov    %r14,%rdi
   7:	e8 ca 7d 8e 00       	call   0x8e7dd6
   c:	f6 44 24 61 02       	testb  $0x2,0x61(%rsp)
  11:	0f 85 85 01 00 00    	jne    0x19c
  17:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  1e:	74 01                	je     0x21
  20:	fb                   	sti
  21:	48 c7 44 24 40 0e 36 	movq   $0x45e0360e,0x40(%rsp)
  28:	e0 45
* 2a:	4b c7 44 25 00 00 00 	movq   $0x0,0x0(%r13,%r12,1) <-- trapping instruction
  31:	00 00
  33:	43 c7 44 25 09 00 00 	movl   $0x0,0x9(%r13,%r12,1)
  3a:	00 00
  3c:	43                   	rex.XB
  3d:	c7                   	.byte 0xc7
  3e:	44                   	rex.R
  3f:	25                   	.byte 0x25