INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 PID: 5794 Comm: syz-executor.4 Not tainted 6.2.0-rc7-next-20230208-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 assign_lock_key kernel/locking/lockdep.c:982 [inline]
 register_lock_class+0xdb6/0x1120 kernel/locking/lockdep.c:1295
 __lock_acquire+0x10a/0x5df0 kernel/locking/lockdep.c:4951
 lock_acquire.part.0+0x11c/0x370 kernel/locking/lockdep.c:5691
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
 ref_tracker_dir_exit+0x52/0x600 lib/ref_tracker.c:24
 net_free net/core/net_namespace.c:442 [inline]
 net_free+0x98/0xd0 net/core/net_namespace.c:436
 copy_net_ns+0x4f3/0x6b0 net/core/net_namespace.c:493
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228
 ksys_unshare+0x449/0x920 kernel/fork.c:3205
 __do_sys_unshare kernel/fork.c:3276 [inline]
 __se_sys_unshare kernel/fork.c:3274 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3274
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa52a48d6b7
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff4699de58 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fff4699e498 RCX: 00007fa52a48d6b7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 00007fff4699df30 R14: 00007fa52a5ac9d8 R15: 000000000000000c
 </TASK>
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: 5794 Comm: syz-executor.4 Not tainted 6.2.0-rc7-next-20230208-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
RIP: 0010:ref_tracker_dir_exit+0x92/0x600 lib/ref_tracker.c:25
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 68 05 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 60 4c 89 f2 4d 89 f7 48 c1 ea 03 <80> 3c 02 00 0f 85 2b 05 00 00 4c 39 34 24 49 8b 2e 0f 84 31 01 00
RSP: 0018:ffffc9000322fd00 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff816664e4
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc9000322fc70
RBP: ffff88807d8f1cc0 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000645f8e R11: 3e4b5341542f3c20 R12: ffff88807d8f1cc0
R13: ffff88807d8f1e80 R14: 0000000000000000 R15: 0000000000000000
FS:  0000555556df7400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c016cd8c70 CR3: 0000000036812000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 net_free net/core/net_namespace.c:442 [inline]
 net_free+0x98/0xd0 net/core/net_namespace.c:436
 copy_net_ns+0x4f3/0x6b0 net/core/net_namespace.c:493
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228
 ksys_unshare+0x449/0x920 kernel/fork.c:3205
 __do_sys_unshare kernel/fork.c:3276 [inline]
 __se_sys_unshare kernel/fork.c:3274 [inline]
 __x64_sys_unshare+0x31/0x40 kernel/fork.c:3274
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa52a48d6b7
Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 10 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff4699de58 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fff4699e498 RCX: 00007fa52a48d6b7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 00007fff4699df30 R14: 00007fa52a5ac9d8 R15: 000000000000000c
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ref_tracker_dir_exit+0x92/0x600 lib/ref_tracker.c:25
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 68 05 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 75 60 4c 89 f2 4d 89 f7 48 c1 ea 03 <80> 3c 02 00 0f 85 2b 05 00 00 4c 39 34 24 49 8b 2e 0f 84 31 01 00
RSP: 0018:ffffc9000322fd00 EFLAGS: 00010046
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff816664e4
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffc9000322fc70
RBP: ffff88807d8f1cc0 R08: 0000000000000001 R09: 0000000000000003
R10: fffff52000645f8e R11: 3e4b5341542f3c20 R12: ffff88807d8f1cc0
R13: ffff88807d8f1e80 R14: 0000000000000000 R15: 0000000000000000
FS:  0000555556df7400(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c016cd8c70 CR3: 0000000036812000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 68 05 00 00    	jne    0x576
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	4d 8b 75 60          	mov    0x60(%r13),%r14
  1c:	4c 89 f2             	mov    %r14,%rdx
  1f:	4d 89 f7             	mov    %r14,%r15
  22:	48 c1 ea 03          	shr    $0x3,%rdx
* 26:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2a:	0f 85 2b 05 00 00    	jne    0x55b
  30:	4c 39 34 24          	cmp    %r14,(%rsp)
  34:	49 8b 2e             	mov    (%r14),%rbp
  37:	0f                   	.byte 0xf
  38:	84 31                	test   %dh,(%rcx)
  3a:	01 00                	add    %eax,(%rax)