------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:255 at __ns_ref_put include/linux/ns_common.h:255 [inline], CPU#1: syz.1.1853/11550
WARNING: ./include/linux/ns_common.h:255 at put_time_ns include/linux/time_namespace.h:60 [inline], CPU#1: syz.1.1853/11550
WARNING: ./include/linux/ns_common.h:255 at free_nsproxy+0x45f/0x560 kernel/nsproxy.c:197, CPU#1: syz.1.1853/11550
Modules linked in:
CPU: 1 UID: 0 PID: 11550 Comm: syz.1.1853 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__ns_ref_put include/linux/ns_common.h:255 [inline]
RIP: 0010:put_time_ns include/linux/time_namespace.h:60 [inline]
RIP: 0010:free_nsproxy+0x45f/0x560 kernel/nsproxy.c:197
Code: 77 33 33 00 90 0f 0b 90 e9 83 fd ff ff e8 69 33 33 00 4c 89 ff be 03 00 00 00 e8 bc ff 00 03 e9 8f fd ff ff e8 52 33 33 00 90 <0f> 0b 90 e9 0c fe ff ff e8 44 33 33 00 4c 89 ff be 03 00 00 00 e8
RSP: 0018:ffffc9000afc7a90 EFLAGS: 00010293
RAX: ffffffff818dec2e RBX: ffff888062f407b8 RCX: ffff88802e933d00
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffff88802953d8cb R09: 1ffff110052a7b19
R10: dffffc0000000000 R11: ffffed10052a7b1a R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88802953d800 R15: ffff88802953d8c8
FS:  0000000000000000(0000) GS:ffff888125fcc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000083b14000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 do_exit+0x6b8/0x2300 kernel/exit.c:969
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1111
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4f0 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2e9/0xfa0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdc6d8f6c9
Code: Unable to access opcode bytes at 0x7efdc6d8f69f.
RSP: 002b:00007efdc7b650e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007efdc6fe5fa8 RCX: 00007efdc6d8f6c9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efdc6fe5fa8
RBP: 00007efdc6fe5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efdc6fe6038 R14: 00007fff8635f490 R15: 00007fff8635f578
 </TASK>