------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:288 at __ns_ref_active_get include/linux/ns_common.h:288 [inline], CPU#0: syz.4.849/8603
WARNING: ./include/linux/ns_common.h:288 at nsproxy_ns_active_get+0x88f/0xcb0 fs/nsfs.c:689, CPU#0: syz.4.849/8603
Modules linked in:
CPU: 0 UID: 0 PID: 8603 Comm: syz.4.849 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:ffffc90004c8fd40 EFLAGS: 00010283
RAX: ffffffff824ad55e RBX: ffff88807e757b60 RCX: 0000000000080000
RDX: ffffc90018af7000 RSI: 000000000000092e RDI: 000000000000092f
RBP: ffffc90004c8fe01 R08: ffff88807e05a8bb R09: 1ffff1100fc0b517
R10: dffffc0000000000 R11: ffffed100fc0b518 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88807e05a8b8 R15: ffff88807e05a800
FS:  00007f886e9f76c0(0000) GS:ffff888125a79000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31923ffc CR3: 000000007ded8000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 switch_task_namespaces+0x3e/0x110 kernel/nsproxy.c:240
 commit_nsset kernel/nsproxy.c:555 [inline]
 __do_sys_setns kernel/nsproxy.c:591 [inline]
 __se_sys_setns+0x784/0x17d0 kernel/nsproxy.c:559
 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: 0033:0x7f886db90ef7
Code: 73 01 c3 48 c7 c1 a8 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 34 01 00 00 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:00007f886e9f6fd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000134
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f886db90ef7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000c9
RBP: 00007f886dc11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f886dde6038 R14: 00007f886dde5fa0 R15: 00007ffcaed33e68
 </TASK>