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: 16155 Comm: kworker/u4:21 Not tainted 5.19.0-rc3-syzkaller-00038-gca1fdab7fd27 #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+0x67/0x100 lib/list_debug.c:51
Code: 4c 89 ff e8 db 67 a5 fd 48 ba 00 01 00 00 00 00 ad de 4d 8b 37 49 39 d6 74 53 48 83 c2 22 48 39 d3 74 5d 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 aa 67 a5 fd 48 8b 13 4c 39 fa 75
RSP: 0018:ffffc900157f7ae8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8dc30260
RDX: dead000000000122 RSI: 0000000000000008 RDI: ffff888017697728
RBP: 1ffff11003f34722 R08: dffffc0000000000 R09: fffff52002afef39
R10: fffff52002afef39 R11: 1ffff92002afef38 R12: dffffc0000000000
R13: ffff888017697710 R14: 0000000000000000 R15: ffff888017697720
FS:  0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f337c941d94 CR3: 000000007d0da000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry include/linux/list.h:134 [inline]
 list_del include/linux/list.h:148 [inline]
 cttimeout_net_exit+0xba/0x270 net/netfilter/nfnetlink_cttimeout.c:618
 ops_exit_list net/core/net_namespace.c:162 [inline]
 cleanup_net+0x758/0xc50 net/core/net_namespace.c:594
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid+0x67/0x100 lib/list_debug.c:51
Code: 4c 89 ff e8 db 67 a5 fd 48 ba 00 01 00 00 00 00 ad de 4d 8b 37 49 39 d6 74 53 48 83 c2 22 48 39 d3 74 5d 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 aa 67 a5 fd 48 8b 13 4c 39 fa 75
RSP: 0018:ffffc900157f7ae8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8dc30260
RDX: dead000000000122 RSI: 0000000000000008 RDI: ffff888017697728
RBP: 1ffff11003f34722 R08: dffffc0000000000 R09: fffff52002afef39
R10: fffff52002afef39 R11: 1ffff92002afef38 R12: dffffc0000000000
R13: ffff888017697710 R14: 0000000000000000 R15: ffff888017697720
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558d523d4950 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000003b DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	4c 89 ff             	mov    %r15,%rdi
   3:	e8 db 67 a5 fd       	callq  0xfda567e3
   8:	48 ba 00 01 00 00 00 	movabs $0xdead000000000100,%rdx
   f:	00 ad de
  12:	4d 8b 37             	mov    (%r15),%r14
  15:	49 39 d6             	cmp    %rdx,%r14
  18:	74 53                	je     0x6d
  1a:	48 83 c2 22          	add    $0x22,%rdx
  1e:	48 39 d3             	cmp    %rdx,%rbx
  21:	74 5d                	je     0x80
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 aa 67 a5 fd       	callq  0xfda567e3
  39:	48 8b 13             	mov    (%rbx),%rdx
  3c:	4c 39 fa             	cmp    %r15,%rdx
  3f:	75                   	.byte 0x75