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WARNING: fs/namespace.c:1434 at mntput_no_expire+0x78e/0xbe0, CPU#0: syz-executor.7/4076
Modules linked in:
CPU: 0 UID: 0 PID: 4076 Comm: syz-executor.7 Tainted: G        W           6.17.0-rc4-next-20250901 #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 d6 30 81 04 01 e8 71 df 91 ff e9 41 fc ff ff e8 27 47 b4 ff 31 ff 44 89 ee e8 4d 42 b4 ff 45 85 ed 79 09 e8 13 47 b4 ff 90 <0f> 0b 90 e8 0a 47 b4 ff e8 b5 2d fc 02 31 ff 89 c5 89 c6 e8 2a 42
RSP: 0018:ffff88800f7d7bd0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 1ffff11001efaf7f RCX: ffffffff81bfaf93
RDX: ffff888016a83700 RSI: ffffffff81bfaf9d RDI: 0000000000000005
RBP: ffff88801f0d16c0 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: ffff88800f7d7c38
R13: 00000000ffffffff R14: dead000000000100 R15: ffff88801f0d16c0
FS:  0000000000000000(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d426000 CR3: 000000003f3dc000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 namespace_unlock+0x7f1/0x810
 put_mnt_ns+0xf5/0x120
 free_nsproxy+0x3a/0x400
 switch_task_namespaces+0xe2/0x100
 do_exit+0x841/0x2970
 do_group_exit+0xd3/0x2a0
 __x64_sys_exit_group+0x3e/0x50
 x64_sys_call+0x18c5/0x18d0
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff72bc87b19
Code: Unable to access opcode bytes at 0x7ff72bc87aef.
RSP: 002b:00007ff7291fcbc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007ff72bd9af60 RCX: 00007ff72bc87b19
RDX: 00007ff72bc87b19 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000000000b R08: 0000000000000000 R09: 00007ff72bd9af60
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc18e34faf R14: 00007ff7291fd300 R15: 0000000000022000
 </TASK>
irq event stamp: 675
hardirqs last  enabled at (685): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (694): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (266): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (261): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---