------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:311 at __ns_ref_active_put include/linux/ns_common.h:311 [inline], CPU#1: syz.2.491/7929
WARNING: ./include/linux/ns_common.h:311 at nsproxy_ns_active_put+0xa19/0xd30 fs/nsfs.c:707, CPU#1: syz.2.491/7929
Modules linked in:
CPU: 1 UID: 0 PID: 7929 Comm: syz.2.491 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_put include/linux/ns_common.h:311 [inline]
RIP: 0010:nsproxy_ns_active_put+0xa19/0xd30 fs/nsfs.c:707
Code: 0f 0b 90 e9 71 fc ff ff e8 54 dc 76 ff 90 0f 0b 90 e9 ab fc ff ff e8 46 dc 76 ff 90 0f 0b 90 e9 41 fd ff ff e8 38 dc 76 ff 90 <0f> 0b 90 e9 64 fd ff ff e8 2a dc 76 ff 90 0f 0b 90 e9 98 fd ff ff
RSP: 0018:ffffc9000dddfcf8 EFLAGS: 00010293
RAX: ffffffff824a4348 RBX: ffff88801c6e0b60 RCX: ffff88802691bd00
RDX: 0000000000000000 RSI: 00000000effffff8 RDI: 00000000effffff8
RBP: 00000000effffff8 R08: ffffffff8df6eccb R09: 1ffffffff1bedd99
R10: dffffc0000000000 R11: fffffbfff1bedd9a R12: dffffc0000000000
R13: 1ffffffff1bedd85 R14: ffffffff8df6ec00 R15: ffffffff8df6ec28
FS:  0000000000000000(0000) GS:ffff888125fcc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30c23ffc CR3: 000000000dd38000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 free_nsproxy+0x26/0x560 kernel/nsproxy.c:190
 do_exit+0x6b8/0x2300 kernel/exit.c:969
 __do_sys_exit kernel/exit.c:1078 [inline]
 __se_sys_exit kernel/exit.c:1076 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:1076
 x64_sys_call+0x21f3/0x2210 arch/x86/include/generated/asm/syscalls_64.h:61
 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: 0033:0x7fa4c438f6c9
Code: Unable to access opcode bytes at 0x7fa4c438f69f.
RSP: 002b:00007fa4c514efe8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007fa4c45e5fa0 RCX: 00007fa4c438f6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa4c4411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa4c45e6038 R14: 00007fa4c45e5fa0 R15: 00007ffdb51a9958
 </TASK>