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WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#1: syz-executor.0/11428
Modules linked in:
CPU: 1 UID: 0 PID: 11428 Comm: syz-executor.0 Tainted: G        W           6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:mntput_no_expire+0x78e/0xbe0
Code: 05 16 42 81 04 01 e8 31 f8 91 ff e9 41 fc ff ff e8 b7 50 b4 ff 31 ff 44 89 ee e8 dd 4b b4 ff 45 85 ed 79 09 e8 a3 50 b4 ff 90 <0f> 0b 90 e8 9a 50 b4 ff e8 75 f6 fb 02 31 ff 89 c5 89 c6 e8 ba 4b
RSP: 0018:ffff8880470379c0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11008e06f3d RCX: ffffffff81bf96d3
RDX: ffff888048559b80 RSI: ffffffff81bf96dd RDI: 0000000000000005
RBP: ffff88800cd18c40 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff888047037a28
R13: 00000000ffffffff R14: dead000000000100 R15: ffff88800cd18c40
FS:  0000000000000000(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efdcc352718 CR3: 000000000f6af000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 namespace_unlock+0x57d/0x810
 put_mnt_ns+0xf5/0x120
 free_nsproxy+0x3a/0x400
 switch_task_namespaces+0xe2/0x100
 do_exit+0x841/0x2970
 do_group_exit+0xd3/0x2a0
 get_signal+0x2315/0x2340
 arch_do_signal_or_restart+0x80/0x790
 exit_to_user_mode_loop+0x8b/0x110
 do_syscall_64+0x2f7/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efdcedfdb19
Code: Unable to access opcode bytes at 0x7efdcedfdaef.
RSP: 002b:00007efdcc373218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007efdcef10f68 RCX: 00007efdcedfdb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efdcef10f68
RBP: 00007efdcef10f60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007efdcef10f6c
R13: 00007ffdffc9dbdf R14: 00007efdcc373300 R15: 0000000000022000
 </TASK>
irq event stamp: 3701
hardirqs last  enabled at (3709): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (3718): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (3350): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (3345): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---