------------[ cut here ]------------
WARNING: ./include/linux/ns_common.h:255 at __ns_ref_put include/linux/ns_common.h:255 [inline], CPU#1: syz-executor/5832
WARNING: ./include/linux/ns_common.h:255 at put_uts_ns include/linux/uts_namespace.h:37 [inline], CPU#1: syz-executor/5832
WARNING: ./include/linux/ns_common.h:255 at free_nsproxy+0x415/0x560 kernel/nsproxy.c:193, CPU#1: syz-executor/5832
Modules linked in:
CPU: 1 UID: 0 PID: 5832 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__ns_ref_put include/linux/ns_common.h:255 [inline]
RIP: 0010:put_uts_ns include/linux/uts_namespace.h:37 [inline]
RIP: 0010:free_nsproxy+0x415/0x560 kernel/nsproxy.c:193
Code: 85 ed 0f 8e be 00 00 00 e8 48 4d 33 00 48 8b 3d 71 71 32 11 48 89 de 5b 41 5c 41 5e 41 5f 5d e9 01 77 8e 00 e8 2c 4d 33 00 90 <0f> 0b 90 e9 ba fc ff ff e8 1e 4d 33 00 4c 89 ff be 03 00 00 00 e8
RSP: 0018:ffffc9000455fa90 EFLAGS: 00010293
RAX: ffffffff818e8304 RBX: ffff8880604c6410 RCX: ffff88807bcd3d00
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffff88807f3d4253 R09: 1ffff1100fe7a84a
R10: dffffc0000000000 R11: ffffed100fe7a84b R12: dffffc0000000000
R13: 0000000000000009 R14: ffff88807f3d4000 R15: ffff88807f3d4250
FS:  0000000000000000(0000) GS:ffff888125b79000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f06b9be6038 CR3: 0000000066000000 CR4: 00000000003526f0
DR0: 000000000000263e DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
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: 0033:0x7fe7bc18e0dc
Code: Unable to access opcode bytes at 0x7fe7bc18e0b2.
RSP: 002b:00007ffdb86153b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 00000000ffffffff RCX: 00007fe7bc18e0dc
RDX: 0000000000000030 RSI: 00007ffdb8615470 RDI: 00000000000000f9
RBP: 00007ffdb861541c R08: 0000000000000000 R09: 0079746972756365
R10: 00007ffdb8614d70 R11: 0000000000000246 R12: 0000000000000258
R13: 00000000000927c0 R14: 000000000005988d R15: 00007ffdb8615470
 </TASK>