syzbot

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WARNING: ./include/linux/ns_common.h:229 at __ns_ref_put include/linux/ns_common.h:229 [inline], CPU#0: kworker/0:6/6108
WARNING: ./include/linux/ns_common.h:229 at put_user_ns include/linux/user_namespace.h:189 [inline], CPU#0: kworker/0:6/6108
WARNING: ./include/linux/ns_common.h:229 at destroy_super_work+0x15c/0x1a0 fs/super.c:280, CPU#0: kworker/0:6/6108
Modules linked in:
CPU: 0 UID: 0 PID: 6108 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: events destroy_super_work
RIP: 0010:__ns_ref_put include/linux/ns_common.h:229 [inline]
RIP: 0010:put_user_ns include/linux/user_namespace.h:189 [inline]
RIP: 0010:destroy_super_work+0x15c/0x1a0 fs/super.c:280
Code: 90 63 ff 48 81 c3 a8 fc ff ff 48 89 df e8 ec 90 63 ff 4c 89 f7 5b 41 5c 41 5d 41 5e 41 5f 5d e9 8a 91 e1 ff e8 45 df 86 ff 90 <0f> 0b 90 e9 6d ff ff ff e8 37 df 86 ff 4c 89 e7 be 03 00 00 00 e8
RSP: 0018:ffffc900030d7a48 EFLAGS: 00010293
RAX: ffffffff823a294b RBX: ffff88805639c898 RCX: ffff88802ab59e80
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 0000000000000004 R08: ffff88807477565b R09: 1ffff1100e8eeacb
R10: dffffc0000000000 R11: ffffed100e8eeacc R12: ffff888074775658
R13: dffffc0000000000 R14: ffff88805639c000 R15: ffff8880747754c8
FS:  0000000000000000(0000) GS:ffff888125eda000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c008044000 CR3: 0000000077ad4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 process_one_work+0x94a/0x15d0 kernel/workqueue.c:3267
 process_scheduled_works kernel/workqueue.c:3350 [inline]
 worker_thread+0x9b0/0xee0 kernel/workqueue.c:3431
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x52d/0xa70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>