------------[ cut here ]------------
WARNING: CPU: 1 PID: 11 at net/ipv4/route.c:1259 kfree_skb include/linux/skbuff.h:1218 [inline]
WARNING: CPU: 1 PID: 11 at net/ipv4/route.c:1259 ip_rt_bug+0x28/0x120 net/ipv4/route.c:1258
Modules linked in:
CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.0-syzkaller-04313-g40cab44b9089 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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 1c 62 38 f9 66 90 e8 15 62 38 f9 be 02 00 00 00 48 89 ef e8 28 f5 78 ff <0f> 0b 48 83 c4 08 31 c0 5b 5d 41 5c c3 e8 f6 61 38 f9 48 8d 7d 10
RSP: 0018:ffffc900001e0870 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88804c4db980 RCX: 0000000000000100
RDX: ffff88813fe1ba80 RSI: ffffffff8848efd8 RDI: 0000000000000000
RBP: ffff8880421fba00 R08: 0000000000000000 R09: ffffffff91335b57
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88802d2c9a00
R13: ffff8880421fba00 R14: 0000000000000000 R15: ffff8880421fba58
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7379585058 CR3: 000000004f8d7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dst_output include/net/dst.h:444 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb net/ipv4/ip_output.c:1586 [inline]
 ip_push_pending_frames+0x129/0x2b0 net/ipv4/ip_output.c:1606
 icmp_push_reply+0x319/0x440 net/ipv4/icmp.c:386
 __icmp_send+0xb80/0x13f0 net/ipv4/icmp.c:762
 ipv4_send_dest_unreach net/ipv4/route.c:1239 [inline]
 ipv4_link_failure+0x5aa/0x9b0 net/ipv4/route.c:1246
 dst_link_failure include/net/dst.h:423 [inline]
 arp_error_report+0xcb/0x1c0 net/ipv4/arp.c:296
 neigh_invalidate+0x20d/0x560 net/core/neighbour.c:1067
 neigh_timer_handler+0xd9e/0x1150 net/core/neighbour.c:1154
 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1700
 expire_timers+0x2c6/0x5c0 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+0x1fb/0xadc kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x123/0x180 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:1107
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:lock_acquire+0x227/0x630 kernel/locking/lockdep.c:5636
Code: 8f 9e 7e 83 f8 01 0f 85 3a 03 00 00 9c 58 f6 c4 02 0f 85 25 03 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:ffffc90000107b90 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff92000020f75 RCX: dcc59e95c1ec6130
RDX: 1ffff11027fc3896 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff91335ac7
R10: fffffbfff2266b58 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8c7917c0 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:325 [inline]
 rcu_read_lock include/linux/rcupdate.h:764 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0x131/0xfa0 net/batman-adv/network-coding.c:719
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x669/0x1090 kernel/workqueue.c:2436
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	9e                   	sahf
   1:	7e 83                	jle    0xffffff86
   3:	f8                   	clc
   4:	01 0f                	add    %ecx,(%rdi)
   6:	85 3a                	test   %edi,(%rdx)
   8:	03 00                	add    (%rax),%eax
   a:	00 9c 58 f6 c4 02 0f 	add    %bl,0xf02c4f6(%rax,%rbx,2)
  11:	85 25 03 00 00 48    	test   %esp,0x48000003(%rip)        # 0x4800001a
  17:	83 7c 24 08 00       	cmpl   $0x0,0x8(%rsp)
  1c:	74 01                	je     0x1f
  1e:	fb                   	sti
  1f:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  26:	fc ff df
* 29:	48 01 c3             	add    %rax,%rbx <-- trapping instruction
  2c:	48 c7 03 00 00 00 00 	movq   $0x0,(%rbx)
  33:	48 c7 43 08 00 00 00 	movq   $0x0,0x8(%rbx)
  3a:	00
  3b:	48                   	rex.W
  3c:	8b                   	.byte 0x8b
  3d:	84                   	.byte 0x84
  3e:	24                   	.byte 0x24