general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 11306 Comm: kworker/u4:8 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51
Code: 0f 84 1f 16 31 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 20 16 31 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 d7 15 31 05 49 8d 7d
RSP: 0018:ffffc9000555f970 EFLAGS: 00010256
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffe8ffffc791c0
RBP: ffffe8ffffc791b8 R08: 0000000000000000 R09: ffffffff8d300f63
R10: fffffbfff1a601ec R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffe8ffffc79058 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33332000 CR3: 000000007f6a7000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 __list_del_entry include/linux/list.h:134 [inline]
 list_del_rcu include/linux/rculist.h:157 [inline]
 __netif_napi_del.part.0+0x118/0x520 net/core/dev.c:6993
 __netif_napi_del+0x3c/0x50 net/core/dev.c:6989
 gro_cells_destroy net/core/gro_cells.c:102 [inline]
 gro_cells_destroy+0x115/0x360 net/core/gro_cells.c:92
 ip6_dev_free+0x15/0x60 net/ipv6/ip6_tunnel.c:248
 netdev_run_todo+0x6b4/0xa80 net/core/dev.c:10627
 ip6_tnl_exit_batch_net+0x5fa/0x890 net/ipv6/ip6_tunnel.c:2312
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:171
 cleanup_net+0x4ea/0xb00 net/core/net_namespace.c:593
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 10b8ad0dd541d4f4 ]---
RIP: 0010:__list_del_entry_valid+0x81/0xf0 lib/list_debug.c:51
Code: 0f 84 1f 16 31 05 48 b8 22 01 00 00 00 00 ad de 49 39 c4 0f 84 20 16 31 05 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 51 49 8b 14 24 48 39 ea 0f 85 d7 15 31 05 49 8d 7d
RSP: 0018:ffffc9000555f970 EFLAGS: 00010256
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffe8ffffc791c0
RBP: ffffe8ffffc791b8 R08: 0000000000000000 R09: ffffffff8d300f63
R10: fffffbfff1a601ec R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffe8ffffc79058 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23cf9da1b8 CR3: 0000000018a21000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess):
   0:	0f 84 1f 16 31 05    	je     0x5311625
   6:	48 b8 22 01 00 00 00 	movabs $0xdead000000000122,%rax
   d:	00 ad de
  10:	49 39 c4             	cmp    %rax,%r12
  13:	0f 84 20 16 31 05    	je     0x5311639
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	4c 89 e2             	mov    %r12,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	75 51                	jne    0x81
  30:	49 8b 14 24          	mov    (%r12),%rdx
  34:	48 39 ea             	cmp    %rbp,%rdx
  37:	0f 85 d7 15 31 05    	jne    0x5311614
  3d:	49                   	rex.WB
  3e:	8d                   	.byte 0x8d
  3f:	7d                   	.byte 0x7d