------------[ cut here ]------------
WARNING: CPU: 0 PID: 5170 at net/ipv4/route.c:1259 kfree_skb include/linux/skbuff.h:1236 [inline]
WARNING: CPU: 0 PID: 5170 at net/ipv4/route.c:1259 ip_rt_bug+0x28/0x120 net/ipv4/route.c:1258
Modules linked in:
CPU: 0 PID: 5170 Comm: kworker/u4:7 Not tainted 6.4.0-rc1-syzkaller-00220-g6d4ff8aed3b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:ip_rt_bug+0x28/0x120 net/ipv4/route.c:1259
Code: 00 00 f3 0f 1e fa 41 54 55 48 89 d5 53 48 83 ec 08 e8 bc d5 fa f8 66 90 e8 b5 d5 fa f8 be 02 00 00 00 48 89 ef e8 e8 65 7f ff <0f> 0b 48 83 c4 08 31 c0 5b 5d 41 5c c3 e8 96 d5 fa f8 48 8d 7d 10
RSP: 0018:ffffc90000007890 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888077001cc0 RCX: 0000000000000100
RDX: ffff88807db5bb80 RSI: ffffffff88896f38 RDI: 0000000000000000
RBP: ffff8880210fc8c0 R08: 0000000000000000 R09: ffffffff91527d97
R10: 0000000000000001 R11: ffffffff8a12e924 R12: ffff88802b8baa00
R13: ffff8880210fc8c0 R14: 0000000000000000 R15: ffff8880210fc918
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5e2c386058 CR3: 000000004bfff000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dst_output include/net/dst.h:458 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb net/ipv4/ip_output.c:1597 [inline]
 ip_push_pending_frames+0x129/0x2b0 net/ipv4/ip_output.c:1617
 icmp_push_reply+0x320/0x450 net/ipv4/icmp.c:389
 __icmp_send+0xba6/0x1450 net/ipv4/icmp.c:770
 ipv4_send_dest_unreach net/ipv4/route.c:1239 [inline]
 ipv4_link_failure+0x5a9/0x9e0 net/ipv4/route.c:1246
 dst_link_failure include/net/dst.h:437 [inline]
 arp_error_report+0xcb/0x1c0 net/ipv4/arp.c:296
 neigh_invalidate+0x20d/0x560 net/core/neighbour.c:1048
 neigh_timer_handler+0xc39/0x1010 net/core/neighbour.c:1135
 call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
 expire_timers+0x29b/0x4b0 kernel/time/timer.c:1751
 __run_timers kernel/time/timer.c:2022 [inline]
 __run_timers kernel/time/timer.c:1995 [inline]
 run_timer_softirq+0x326/0x910 kernel/time/timer.c:2035
 __do_softirq+0x1d4/0x905 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x114/0x190 kernel/softirq.c:650
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x97/0xc0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:lock_acquire+0x1f5/0x520 kernel/locking/lockdep.c:5659
Code: 98 9c 7e 83 f8 01 0f 85 b9 02 00 00 9c 58 f6 c4 02 0f 85 a4 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900051efba0 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000a3df76 RCX: 9f881ac7ca99fe75
RDX: 1ffff1100fb6b8c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff91527d07
R10: fffffbfff22a4fa0 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8c799040 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:327 [inline]
 rcu_read_lock include/linux/rcupdate.h:773 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0x131/0xfe0 net/batman-adv/network-coding.c:719
 process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
 kthread+0x344/0x440 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
----------------
Code disassembly (best guess):
   0:	98                   	cwtl
   1:	9c                   	pushfq
   2:	7e 83                	jle    0xffffff87
   4:	f8                   	clc
   5:	01 0f                	add    %ecx,(%rdi)
   7:	85 b9 02 00 00 9c    	test   %edi,-0x63fffffe(%rcx)
   d:	58                   	pop    %rax
   e:	f6 c4 02             	test   $0x2,%ah
  11:	0f 85 a4 02 00 00    	jne    0x2bb
  17:	48 83 7c 24 08 00    	cmpq   $0x0,0x8(%rsp)
  1d:	74 01                	je     0x20
  1f:	fb                   	sti
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2d:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  34:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3b:	00
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	84                   	.byte 0x84
  3f:	24                   	.byte 0x24