general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 PID: 13066 Comm: kworker/u4:9 Not tainted 6.4.0-rc5-syzkaller-00017-ga27648c74210 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Workqueue: netns cleanup_net
RIP: 0010:tipc_conn_close+0x56/0x230 net/tipc/topsrv.c:158
Code: c1 e8 03 48 89 44 24 10 42 80 3c 20 00 74 08 48 89 df e8 9d 1f 8f f7 48 89 5c 24 18 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 7b 1f 8f f7 4c 8b 3b 4d 8d af a0
RSP: 0018:ffffc90014c27ad8 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff88807a965940
RDX: 0000000000000000 RSI: ffffffff8aea8e20 RDI: ffff88802359d000
RBP: ffff88802359d000 R08: dffffc0000000000 R09: fffffbfff206524e
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888077546858 R14: ffff888077546898 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002004e000 CR3: 000000003c33a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tipc_topsrv_stop net/tipc/topsrv.c:708 [inline]
 tipc_topsrv_exit_net+0xf8/0x300 net/tipc/topsrv.c:730
 ops_exit_list net/core/net_namespace.c:170 [inline]
 cleanup_net+0x6d2/0xb80 net/core/net_namespace.c:614
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tipc_conn_close+0x56/0x230 net/tipc/topsrv.c:158
Code: c1 e8 03 48 89 44 24 10 42 80 3c 20 00 74 08 48 89 df e8 9d 1f 8f f7 48 89 5c 24 18 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 7b 1f 8f f7 4c 8b 3b 4d 8d af a0
RSP: 0018:ffffc90014c27ad8 EFLAGS: 00010206
RAX: 0000000000000003 RBX: 0000000000000018 RCX: ffff88807a965940
RDX: 0000000000000000 RSI: ffffffff8aea8e20 RDI: ffff88802359d000
RBP: ffff88802359d000 R08: dffffc0000000000 R09: fffffbfff206524e
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888077546858 R14: ffff888077546898 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2dc27000 CR3: 000000007f3c7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c1 e8 03             	shr    $0x3,%eax
   3:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
   8:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
   d:	74 08                	je     0x17
   f:	48 89 df             	mov    %rbx,%rdi
  12:	e8 9d 1f 8f f7       	callq  0xf78f1fb4
  17:	48 89 5c 24 18       	mov    %rbx,0x18(%rsp)
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	48 83 c3 18          	add    $0x18,%rbx
  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 7b 1f 8f f7       	callq  0xf78f1fb4
  39:	4c 8b 3b             	mov    (%rbx),%r15
  3c:	4d                   	rex.WRB
  3d:	8d                   	.byte 0x8d
  3e:	af                   	scas   %es:(%rdi),%eax
  3f:	a0                   	.byte 0xa0