------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 1206 at lib/refcount.c:28 refcount_warn_saturate+0x11a/0x1d0 lib/refcount.c:28
Modules linked in:
CPU: 0 UID: 0 PID: 1206 Comm: kworker/0:2 Not tainted 6.16.0-syzkaller-11852-g479058002c32 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: md_misc mddev_delayed_delete
RIP: 0010:refcount_warn_saturate+0x11a/0x1d0 lib/refcount.c:28
Code: 20 a1 e2 8b e8 07 04 bc fc 90 0f 0b 90 90 eb d7 e8 7b 65 f8 fc c6 05 1e f1 c5 0a 01 90 48 c7 c7 80 a1 e2 8b e8 e7 03 bc fc 90 <0f> 0b 90 90 eb b7 e8 5b 65 f8 fc c6 05 fb f0 c5 0a 01 90 48 c7 c7
RSP: 0018:ffffc90003eefa68 EFLAGS: 00010246
RAX: 6f5205d864142900 RBX: 0000000000000003 RCX: ffff888026ee0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002
RBP: ffffc90003eefc70 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfa1ec R12: ffff8880b8639700
R13: ffff888026bb0c18 R14: ffff8880276e6130 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff888125c24000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b7d0d9f950 CR3: 000000004ad54000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>