RBP: 00007fb4c2eec1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fff3663838f R14: 00007fb4c2eec300 R15: 0000000000022000
 </TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc000000012c: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000960-0x0000000000000967]
CPU: 1 UID: 0 PID: 6255 Comm: syz-executor.1 Not tainted 6.18.0-rc5-next-20251112 #1 PREEMPT(voluntary) 
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:put_ipc_ns+0x30/0xa0
Code: 89 fd 53 e8 52 8e 4e ff 48 85 ed 74 3d e8 48 8e 4e ff 48 8d bd 70 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 5c 48 8b 9d 70 09 00 00 bf 08 00 00 00 48 89 de e8
RSP: 0018:ffff88800da2f9e0 EFLAGS: 00010213
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc9000081d000
RDX: 000000000000012c RSI: ffffffff82263468 RDI: 0000000000000964
RBP: fffffffffffffff4 R08: 0000000000000001 R09: ffffed1001c44891
R10: 0000000000000002 R11: 0000000000000001 R12: ffff88800e2242d8
R13: ffff88800e22448c R14: ffffffff85cfbf20 R15: ffff88800e67a438
FS:  00007fb4c2eec700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb4c2eebf78 CR3: 00000000215f0000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 nsproxy_free+0xd2/0x5a0
 create_new_namespaces+0x585/0x750
 copy_namespaces+0x45c/0x580
 copy_process+0x26e4/0x72a0
 kernel_clone+0xea/0x7f0
 __do_sys_clone3+0x1f5/0x280
 do_syscall_64+0xbf/0x430
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb4c5976b19
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:00007fb4c2eec188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fb4c5a89f60 RCX: 00007fb4c5976b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000000
RBP: 00007fb4c2eec1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007fff3663838f R14: 00007fb4c2eec300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:put_ipc_ns+0x30/0xa0
Code: 89 fd 53 e8 52 8e 4e ff 48 85 ed 74 3d e8 48 8e 4e ff 48 8d bd 70 09 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 5c 48 8b 9d 70 09 00 00 bf 08 00 00 00 48 89 de e8
RSP: 0018:ffff88800da2f9e0 EFLAGS: 00010213
RAX: dffffc0000000000 RBX: 0000000000000002 RCX: ffffc9000081d000
RDX: 000000000000012c RSI: ffffffff82263468 RDI: 0000000000000964
RBP: fffffffffffffff4 R08: 0000000000000001 R09: ffffed1001c44891
R10: 0000000000000002 R11: 0000000000000001 R12: ffff88800e2242d8
R13: ffff88800e22448c R14: ffffffff85cfbf20 R15: ffff88800e67a438
FS:  00007fb4c2eec700(0000) GS:ffff8880e5497000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb4c2eebf78 CR3: 00000000215f0000 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 52 8e 4e ff       	callq  0xff4e8e5a
   8:	48 85 ed             	test   %rbp,%rbp
   b:	74 3d                	je     0x4a
   d:	e8 48 8e 4e ff       	callq  0xff4e8e5a
  12:	48 8d bd 70 09 00 00 	lea    0x970(%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 5c                	jne    0x8c
  30:	48 8b 9d 70 09 00 00 	mov    0x970(%rbp),%rbx
  37:	bf 08 00 00 00       	mov    $0x8,%edi
  3c:	48 89 de             	mov    %rbx,%rsi
  3f:	e8                   	.byte 0xe8