------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at __ns_ref_active_get include/linux/ns_common.h:288 [inline], CPU#1: syz.0.247/6746
WARNING: ./include/linux/ns_common.h:288 at alloc_pid+0xad6/0xc70 kernel/pid.c:285, CPU#1: syz.0.247/6746
Modules linked in:
CPU: 1 UID: 0 PID: 6746 Comm: syz.0.247 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__ns_ref_active_get include/linux/ns_common.h:288 [inline]
RIP: 0010:alloc_pid+0xad6/0xc70 kernel/pid.c:285
Code: cc e8 7e d6 34 00 be 02 00 00 00 eb 0a e8 72 d6 34 00 be 01 00 00 00 48 89 df e8 a5 d0 0c 03 e9 84 fa ff ff e8 5b d6 34 00 90 <0f> 0b 90 e9 2c fd ff ff e8 4d d6 34 00 90 0f 0b 90 e9 5b fd ff ff
RSP: 0018:ffffc9001945f938 EFLAGS: 00010293
RAX: ffffffff818cf9d5 RBX: ffff88802605c418 RCX: ffff8880258e0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffff888033e8d901 R08: ffff88802605c41b R09: 1ffff11004c0b883
R10: dffffc0000000000 R11: ffffed1004c0b884 R12: dffffc0000000000
R13: 1ffff110067d1b51 R14: ffff88802605c2b0 R15: dffffc0000000000
FS:  000055558484d500(0000) GS:ffff888125b79000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd7ee3b8580 CR3: 00000000537e2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 copy_process+0x18e7/0x3930 kernel/fork.c:2196
 kernel_clone+0x21e/0x840 kernel/fork.c:2609
 __do_sys_clone3 kernel/fork.c:2911 [inline]
 __se_sys_clone3+0x256/0x2d0 kernel/fork.c:2890
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd7ee1c3e09
Code: cf 08 00 48 8d 3d dc cf 08 00 e8 e2 28 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7
RSP: 002b:00007fff289d5368 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3