Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 UID: 0 PID: 8494 Comm: kworker/u10:6 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: netns cleanup_net
RIP: 0010:tipc_conn_close+0x48/0x1d0 net/tipc/topsrv.c:158
Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 6a 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 08 48 8d 7d 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 54 01 00 00 4c 8b 6d 18 49 8d ad f0 03 00 00 48
RSP: 0000:ffffc900036b7a08 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88805ad5f400 RCX: 0000000000000080
RDX: 0000000000000003 RSI: ffffffff8b304cc4 RDI: 0000000000000018
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888026e78800
R13: 0000000000000000 R14: ffff88805ad5f408 R15: ffffed1004dcf113
FS:  0000000000000000(0000) GS:ffff88812432e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30ed6ff8 CR3: 000000003b4a4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 tipc_topsrv_stop net/tipc/topsrv.c:709 [inline]
 tipc_topsrv_exit_net+0x211/0x4b0 net/tipc/topsrv.c:732
 ops_exit_list net/core/net_namespace.c:199 [inline]
 ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:252
 cleanup_net+0x499/0x920 net/core/net_namespace.c:702
 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3288
 process_scheduled_works kernel/workqueue.c:3371 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3452
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tipc_conn_close+0x48/0x1d0 net/tipc/topsrv.c:158
Code: fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 6a 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b 08 48 8d 7d 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 54 01 00 00 4c 8b 6d 18 49 8d ad f0 03 00 00 48
RSP: 0000:ffffc900036b7a08 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88805ad5f400 RCX: 0000000000000080
RDX: 0000000000000003 RSI: ffffffff8b304cc4 RDI: 0000000000000018
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888026e78800
R13: 0000000000000000 R14: ffff88805ad5f408 R15: ffffed1004dcf113
FS:  0000000000000000(0000) GS:ffff88812432e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000001c000 CR3: 0000000075802000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 3 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 6a 01 00 00    	jne    0x178
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	48 8b 6b 08          	mov    0x8(%rbx),%rbp
  1c:	48 8d 7d 18          	lea    0x18(%rbp),%rdi
  20:	48 89 fa             	mov    %rdi,%rdx
  23:	48 c1 ea 03          	shr    $0x3,%rdx
* 27:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2b:	0f 85 54 01 00 00    	jne    0x185
  31:	4c 8b 6d 18          	mov    0x18(%rbp),%r13
  35:	49 8d ad f0 03 00 00 	lea    0x3f0(%r13),%rbp
  3c:	48                   	rex.W