general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 PID: 5 Comm: netns Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: netns cleanup_net
RIP: 0010:tipc_conn_close+0x4c/0x130 net/tipc/topsrv.c:157
Code: 7b 08 4d 89 fe 49 c1 ee 03 43 80 3c 26 00 74 08 4c 89 ff e8 d6 1a da fc 4c 89 7d d0 4d 8b 3f 49 83 c7 18 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 b5 1a da fc 4d 8b 27 4d 8d bc 24
RSP: 0018:ffffc90000057b60 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff888119b7b400 RCX: ffff888100289440
RDX: 0000000000000000 RSI: ffffffff85690660 RDI: ffff888119b7b400
RBP: ffffc90000057b90 R08: ffff888119b7b403 R09: 1ffff1102336f680
R10: dffffc0000000000 R11: ffffed102336f681 R12: dffffc0000000000
R13: 1ffff11026099903 R14: 1ffff1102336f681 R15: 0000000000000018
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000013ea0b000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 tipc_topsrv_stop net/tipc/topsrv.c:704 [inline]
 tipc_topsrv_exit_net+0x182/0x390 net/tipc/topsrv.c:727
 ops_exit_list net/core/net_namespace.c:172 [inline]
 cleanup_net+0x5b5/0xb10 net/core/net_namespace.c:604
 process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
 process_scheduled_works kernel/workqueue.c:2365 [inline]
 rescuer_thread+0x75b/0xf80 kernel/workqueue.c:2556
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tipc_conn_close+0x4c/0x130 net/tipc/topsrv.c:157
Code: 7b 08 4d 89 fe 49 c1 ee 03 43 80 3c 26 00 74 08 4c 89 ff e8 d6 1a da fc 4c 89 7d d0 4d 8b 3f 49 83 c7 18 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 b5 1a da fc 4d 8b 27 4d 8d bc 24
RSP: 0018:ffffc90000057b60 EFLAGS: 00010206
RAX: 0000000000000003 RBX: ffff888119b7b400 RCX: ffff888100289440
RDX: 0000000000000000 RSI: ffffffff85690660 RDI: ffff888119b7b400
RBP: ffffc90000057b90 R08: ffff888119b7b403 R09: 1ffff1102336f680
R10: dffffc0000000000 R11: ffffed102336f681 R12: dffffc0000000000
R13: 1ffff11026099903 R14: 1ffff1102336f681 R15: 0000000000000018
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f340bd03d58 CR3: 00000001104ea000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
----------------
Code disassembly (best guess):
   0:	7b 08                	jnp    0xa
   2:	4d 89 fe             	mov    %r15,%r14
   5:	49 c1 ee 03          	shr    $0x3,%r14
   9:	43 80 3c 26 00       	cmpb   $0x0,(%r14,%r12,1)
   e:	74 08                	je     0x18
  10:	4c 89 ff             	mov    %r15,%rdi
  13:	e8 d6 1a da fc       	call   0xfcda1aee
  18:	4c 89 7d d0          	mov    %r15,-0x30(%rbp)
  1c:	4d 8b 3f             	mov    (%r15),%r15
  1f:	49 83 c7 18          	add    $0x18,%r15
  23:	4c 89 f8             	mov    %r15,%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:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 b5 1a da fc       	call   0xfcda1aee
  39:	4d 8b 27             	mov    (%r15),%r12
  3c:	4d                   	rex.WRB
  3d:	8d                   	.byte 0x8d
  3e:	bc                   	.byte 0xbc
  3f:	24                   	.byte 0x24