syzbot

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!list_empty(&dquot->dq_free)
WARNING: fs/quota/dquot.c:883 at dqput+0x341/0x470 fs/quota/dquot.c:883, CPU#0: kworker/0:0/9
Modules linked in:
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events qsync_work_fn
RIP: 0010:dqput+0x341/0x470 fs/quota/dquot.c:883
Code: 81 67 ff eb 05 e8 df 81 67 ff 48 c7 c7 c0 ec a1 8d 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 c5 47 c8 08 e8 c0 81 67 ff 90 <0f> 0b 90 e9 8d fe ff ff 48 c7 c1 fc 4f 6a 8f 80 e1 07 80 c1 03 38
RSP: 0018:ffffc900000e7a10 EFLAGS: 00010293
RAX: ffffffff825ce450 RBX: ffff88805f2917c0 RCX: ffff88801c6fdb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100be522f9 R12: 1ffff1100be522f8
R13: 1ffff1100be522d4 R14: ffff88805f291680 R15: ffff88805f2916a0
FS:  0000000000000000(0000) GS:ffff88812633c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6bdcbfd567 CR3: 0000000061da4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dquot_scan_active+0x226/0x280 fs/quota/dquot.c:666
 qsync_work_fn+0xab/0x150 fs/ocfs2/quota_global.c:658
 process_one_work kernel/workqueue.c:3276 [inline]
 process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359
 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>