------------[ cut here ]------------
WARNING: CPU: 1 PID: 4446 at net/ipv4/route.c:1274 kfree_skb include/linux/skbuff.h:1220 [inline]
WARNING: CPU: 1 PID: 4446 at net/ipv4/route.c:1274 ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1273
Modules linked in:
CPU: 1 PID: 4446 Comm: kworker/u4:10 Not tainted 6.1.134-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: bat_events batadv_tt_purge
RIP: 0010:ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1274
Code: ff ff 0f 1f 00 41 57 41 56 41 55 41 54 53 48 89 d3 e8 0f ef 61 f8 66 90 e8 08 ef 61 f8 48 89 df be 01 00 00 00 e8 7b 12 76 ff <0f> 0b 31 c0 5b 41 5c 41 5d 41 5e 41 5f c3 49 bd 00 00 00 00 00 fc
RSP: 0018:ffffc900001e0638 EFLAGS: 00010296
RAX: 6ae7d778ccdc8401 RBX: ffff888057272280 RCX: ffffffff816ad6ca
RDX: dffffc0000000000 RSI: ffffffff8b0c0c40 RDI: ffffffff8b5f5fe0
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff225705f
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888057272280
R13: ffff8880572722d8 R14: ffff888078703880 R15: ffff8881452f9380
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ca1dffc CR3: 000000005c03a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dst_output include/net/dst.h:453 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb+0x113/0x1a0 net/ipv4/ip_output.c:1599
 __icmp_send+0x12fd/0x1840 net/ipv4/icmp.c:785
 ipv4_send_dest_unreach net/ipv4/route.c:1254 [inline]
 ipv4_link_failure+0x63d/0xa20 net/ipv4/route.c:1261
 dst_link_failure include/net/dst.h:423 [inline]
 arp_error_report+0x112/0x160 net/ipv4/arp.c:296
 neigh_invalidate+0x240/0x460 net/core/neighbour.c:1059
 neigh_timer_handler+0x8a1/0x1010 net/core/neighbour.c:1146
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:should_resched arch/x86/include/asm/preempt.h:103 [inline]
RIP: 0010:__local_bh_enable_ip+0x16c/0x1f0 kernel/softirq.c:410
Code: 8b e8 58 d0 5c 09 65 66 8b 05 b0 82 af 7e 66 85 c0 75 57 bf 01 00 00 00 e8 21 2e 0a 00 e8 6c f0 3c 00 fb 65 8b 05 dc 52 ae 7e <85> c0 75 05 e8 6b 75 ac ff 48 c7 44 24 20 0e 36 e0 45 49 c7 04 1c
RSP: 0018:ffffc900047a7b20 EFLAGS: 00000282
RAX: 0000000080000000 RBX: 1ffff920008f4f68 RCX: ffffffff816ad6ca
RDX: dffffc0000000000 RSI: ffffffff8b0c0c40 RDI: ffffffff8b5f5fe0
RBP: ffffc900047a7bc8 R08: dffffc0000000000 R09: fffffbfff225706a
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff920008f4f6c R14: ffffc900047a7b60 R15: 0000000000000201
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 batadv_tt_global_purge net/batman-adv/translation-table.c:2314 [inline]
 batadv_tt_purge+0x4dc/0xa40 net/batman-adv/translation-table.c:3583
 process_one_work+0x917/0x1260 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b e8                	mov    %eax,%ebp
   2:	58                   	pop    %rax
   3:	d0 5c 09 65          	rcrb   0x65(%rcx,%rcx,1)
   7:	66 8b 05 b0 82 af 7e 	mov    0x7eaf82b0(%rip),%ax        # 0x7eaf82be
   e:	66 85 c0             	test   %ax,%ax
  11:	75 57                	jne    0x6a
  13:	bf 01 00 00 00       	mov    $0x1,%edi
  18:	e8 21 2e 0a 00       	call   0xa2e3e
  1d:	e8 6c f0 3c 00       	call   0x3cf08e
  22:	fb                   	sti
  23:	65 8b 05 dc 52 ae 7e 	mov    %gs:0x7eae52dc(%rip),%eax        # 0x7eae5306
* 2a:	85 c0                	test   %eax,%eax <-- trapping instruction
  2c:	75 05                	jne    0x33
  2e:	e8 6b 75 ac ff       	call   0xffac759e
  33:	48 c7 44 24 20 0e 36 	movq   $0x45e0360e,0x20(%rsp)
  3a:	e0 45
  3c:	49                   	rex.WB
  3d:	c7                   	.byte 0xc7
  3e:	04 1c                	add    $0x1c,%al