------------[ cut here ]------------
WARNING: CPU: 1 PID: 10052 at net/ipv4/route.c:1241 ip_rt_bug+0x2c/0x110 net/ipv4/route.c:1241
Modules linked in:
CPU: 1 UID: 0 PID: 10052 Comm: syz.8.1211 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: 0018:ffffc90000a18680 EFLAGS: 00010286
RAX: 78e31174ec3e3400 RBX: ffff88807dfad500 RCX: ffffffff8170d01a
RDX: dffffc0000000000 RSI: ffffffff8c0acc00 RDI: ffffffff8c611a00
RBP: 0000000000000001 R08: ffffffff942d989f R09: ffffffff8a221e6b
R10: dffffc0000000000 R11: fffffbfff285b314 R12: dffffc0000000000
R13: ffffc90000a188f8 R14: ffff888060753b00 R15: ffff888144e821c0
FS:  00007fdd348f06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd87e3d4f98 CR3: 000000004c39c000 CR4: 00000000003526f0
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:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ba 78 9e f5 48 89 df e8 d2 be 9f f5 e8 9d b3 ca f5 fb bf 01 00 00 00 <e8> e2 39 91 f5 65 8b 05 a3 d1 31 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc900131ef618 EFLAGS: 00000286
RAX: 78e31174ec3e3400 RBX: ffff888054935f18 RCX: ffffffff8170d01a
RDX: dffffc0000000000 RSI: ffffffff8c0acc00 RDI: 0000000000000001
RBP: 1ffff1100a926be2 R08: ffffffff942d9817 R09: 1ffffffff285b302
R10: dffffc0000000000 R11: fffffbfff285b303 R12: ffffc900131ef828
R13: ffffea00013c03c0 R14: ffffea00013c03c0 R15: ffff888054935f10
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 filemap_remove_folio+0x110/0x2e0 mm/filemap.c:266
 truncate_inode_folio+0x5d/0x70 mm/truncate.c:177
 shmem_undo_range+0x43c/0x1cf0 mm/shmem.c:1033
 shmem_truncate_range mm/shmem.c:1149 [inline]
 shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1277
 evict+0x4e8/0x9a0 fs/inode.c:796
 __dentry_kill+0x20d/0x630 fs/dcache.c:625
 dput+0x19f/0x2b0 fs/dcache.c:867
 __fput+0x5ba/0xa50 fs/file_table.c:458
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [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+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdd33b7e759
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:00007fdd348f0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: 0000000020000000 RBX: 00007fdd33d35f80 RCX: 00007fdd33b7e759
RDX: 000000000300000b RSI: 0000000000fbe000 RDI: 0000000020000000
RBP: 00007fdd33bf175e R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000004031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdd33d35f80 R15: 00007fdd33e5fa28
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	f3 0f 1e fa          	endbr64
   5:	53                   	push   %rbx
   6:	48 89 fb             	mov    %rdi,%rbx
   9:	48 83 c7 18          	add    $0x18,%rdi
   d:	48 8b 74 24 08       	mov    0x8(%rsp),%rsi
  12:	e8 ba 78 9e f5       	call   0xf59e78d1
  17:	48 89 df             	mov    %rbx,%rdi
  1a:	e8 d2 be 9f f5       	call   0xf59fbef1
  1f:	e8 9d b3 ca f5       	call   0xf5cab3c1
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 e2 39 91 f5       	call   0xf5913a11 <-- trapping instruction
  2f:	65 8b 05 a3 d1 31 74 	mov    %gs:0x7431d1a3(%rip),%eax        # 0x7431d1d9
  36:	85 c0                	test   %eax,%eax
  38:	74 06                	je     0x40
  3a:	5b                   	pop    %rbx
  3b:	c3                   	ret
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	cc                   	int3