Oops: general protection fault, probably for non-canonical address 0xdffffc0000000017: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000000b8-0x00000000000000bf]
CPU: 0 UID: 0 PID: 15293 Comm: syz-executor.4 Not tainted 6.18.0-rc5-next-20251113 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:put_pid_ns+0x30/0x80
Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8
RSP: 0018:ffff88804c97fdb0 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc90002fbd000
RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba
RBP: ffffffffffffffea R08: 0000000000000001 R09: ffffed100992ffa3
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888017fb8b60
R13: ffff888017fb8d14 R14: ffffffff85cfdf20 R15: ffff888013d32438
FS:  00007f22290e3700(0000) GS:ffff8880e5394000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ce2c000 CR3: 000000004bba4000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 nsproxy_free+0xfa/0x5a0
 create_new_namespaces+0x585/0x750
 unshare_nsproxy_namespaces+0xc0/0x200
 ksys_unshare+0x468/0xa10
 __x64_sys_unshare+0x31/0x40
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f222bb6db19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f22290e3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f222bc80f60 RCX: 00007f222bb6db19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020040400
RBP: 00007f222bbc7f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc6cbc8cbf R14: 00007f22290e3300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:put_pid_ns+0x30/0x80
Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8
RSP: 0018:ffff88804c97fdb0 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc90002fbd000
RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba
RBP: ffffffffffffffea R08: 0000000000000001 R09: ffffed100992ffa3
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888017fb8b60
R13: ffff888017fb8d14 R14: ffffffff85cfdf20 R15: ffff888013d32438
FS:  00007f22290e3700(0000) GS:ffff8880e5394000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ce2c000 CR3: 000000004bba4000 CR4: 0000000000350ef0
Oops: general protection fault, probably for non-canonical address 0xdffffc000000002e: 0000 [#2] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000170-0x0000000000000177]
CPU: 1 UID: 0 PID: 15331 Comm: syz-executor.4 Tainted: G      D             6.18.0-rc5-next-20251113 #1 PREEMPT(voluntary) 
Tainted: [D]=DIE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:nsproxy_free+0x28a/0x5a0
Code: 02 00 00 4c 8b 65 28 4d 85 e4 74 43 e8 4f 47 30 00 49 8d bc 24 78 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f7 02 00 00 49 8b 9c 24 78 01 00 00 bf 08 00 00
RSP: 0018:ffff888048757dc8 EFLAGS: 00010217
RAX: dffffc0000000000 RBX: 0000000000000004 RCX: ffffc900037c1000
RDX: 000000000000002e RSI: ffffffff8144cb61 RDI: 0000000000000174
RBP: ffff88800c8682d8 R08: 0000000000000001 R09: ffffed100130e783
R10: 0000000000000004 R11: ffff88804a2b1ae0 R12: fffffffffffffffc
R13: ffff888009873c1c R14: ffffffff85cfdf20 R15: ffff8880173dbff8
FS:  00007f22290c2700(0000) GS:ffff8880e5494000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd38e5afb8 CR3: 000000003dc8b000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 create_new_namespaces+0x585/0x750
 unshare_nsproxy_namespaces+0xc0/0x200
 ksys_unshare+0x468/0xa10
 __x64_sys_unshare+0x31/0x40
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f222bb6db19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f22290c2188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f222bc81020 RCX: 00007f222bb6db19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000400
RBP: 00007f222bbc7f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc6cbc8cbf R14: 00007f22290c2300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:put_pid_ns+0x30/0x80
Code: 89 fd 53 e8 42 a0 03 00 48 85 ed 74 3d e8 38 a0 03 00 48 8d bd d0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 35 48 8b 9d d0 00 00 00 bf 08 00 00 00 48 89 de e8
RSP: 0018:ffff88804c97fdb0 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc90002fbd000
RDX: 0000000000000017 RSI: ffffffff81717278 RDI: 00000000000000ba
RBP: ffffffffffffffea R08: 0000000000000001 R09: ffffed100992ffa3
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888017fb8b60
R13: ffff888017fb8d14 R14: ffffffff85cfdf20 R15: ffff888013d32438
FS:  00007f22290c2700(0000) GS:ffff8880e5494000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd38e5afb8 CR3: 000000003dc8b000 CR4: 0000000000350ef0
kmemleak: 1 new suspected memory leaks (see /sys/kernel/debug/kmemleak)
----------------
Code disassembly (best guess):
   0:	89 fd                	mov    %edi,%ebp
   2:	53                   	push   %rbx
   3:	e8 42 a0 03 00       	callq  0x3a04a
   8:	48 85 ed             	test   %rbp,%rbp
   b:	74 3d                	je     0x4a
   d:	e8 38 a0 03 00       	callq  0x3a04a
  12:	48 8d bd d0 00 00 00 	lea    0xd0(%rbp),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	75 35                	jne    0x65
  30:	48 8b 9d d0 00 00 00 	mov    0xd0(%rbp),%rbx
  37:	bf 08 00 00 00       	mov    $0x8,%edi
  3c:	48 89 de             	mov    %rbx,%rsi
  3f:	e8                   	.byte 0xe8