------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at __ns_ref_active_get include/linux/ns_common.h:288 [inline], CPU#0: syz.3.1011/16449
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x88f/0xcb0 fs/nsfs.c:689, CPU#0: syz.3.1011/16449
Modules linked in:
CPU: 0 UID: 0 PID: 16449 Comm: syz.3.1011 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:nsproxy_ns_active_get+0x88f/0xcb0 fs/nsfs.c:689
Code: 00 e8 f5 fa 76 ff eb 0c e8 ee fa 76 ff eb 05 e8 e7 fa 76 ff 5b 41 5c 41 5d 41 5e 41 5f 5d e9 c8 c8 1d 09 cc e8 d2 fa 76 ff 90 <0f> 0b 90 e9 ee f7 ff ff e8 c4 fa 76 ff 90 0f 0b 90 e9 12 f8 ff ff
RSP: 0018:ffffc9000b7a79e0 EFLAGS: 00010293
RAX: ffffffff824ad55e RBX: ffff8880615a72d8 RCX: ffff88802f9e1e80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffffff8e1ddd01 R08: ffff88807c916cbb R09: 1ffff1100f922d97
R10: dffffc0000000000 R11: ffffed100f922d98 R12: dffffc0000000000
R13: ffffffff818e72bc R14: ffff88807c916cb8 R15: ffff88807c916c00
FS:  00007f6cd57e46c0(0000) GS:ffff888125a79000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6cd4be5fac CR3: 0000000078d80000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 3a810b1eb6134bdc DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 copy_namespaces+0x48c/0x4b0 kernel/nsproxy.c:183
 copy_process+0x168f/0x3930 kernel/fork.c:2183
 kernel_clone+0x21e/0x840 kernel/fork.c:2609
 __do_sys_clone kernel/fork.c:2750 [inline]
 __se_sys_clone kernel/fork.c:2734 [inline]
 __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734
 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: 0033:0x7f6cd498f6c9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6cd57e3fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f6cd4be6090 RCX: 00007f6cd498f6c9
RDX: 0000200000000080 RSI: 0000200000000140 RDI: 0000000004000000
RBP: 00007f6cd4a11f91 R08: 0000200000000240 R09: 0000200000000240
R10: 00002000000001c0 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f6cd4be6128 R14: 00007f6cd4be6090 R15: 00007fff2d847968
 </TASK>