syzbot

ODEBUG: object ffffc9000154f940 is on stack ffffc90001548000, but NOT annotated.
------------[ cut here ]------------
1
WARNING: lib/debugobjects.c:655 at debug_object_is_on_stack lib/debugobjects.c:655 [inline], CPU#1: kworker/u8:4/68
WARNING: lib/debugobjects.c:655 at lookup_object_or_alloc lib/debugobjects.c:688 [inline], CPU#1: kworker/u8:4/68
WARNING: lib/debugobjects.c:655 at debug_object_activate+0x424/0x520 lib/debugobjects.c:820, CPU#1: kworker/u8:4/68
Modules linked in:
CPU: 1 UID: 0 PID: 68 Comm: kworker/u8:4 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound fsnotify_mark_destroy_workfn
RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:655 [inline]
RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:688 [inline]
RIP: 0010:debug_object_activate+0x424/0x520 lib/debugobjects.c:820
Code: c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 55 74 77 06 cc ff c5 89 2d cc 13 d0 14 48 c7 c7 80 1e 86 8b 48 89 de e8 7d bf 88 fc 90 <0f> 0b 90 49 81 fd 00 f0 ff ff 0f 86 a4 fd ff ff c7 44 24 04 00 00
RSP: 0018:ffffc9000154f8a0 EFLAGS: 00010046
RAX: 0000000000000050 RBX: ffffc9000154f940 RCX: d0ae81cde7617d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff520002a9ec5 R12: ffff88801d76bc20
R13: ffff88813fe35000 R14: dffffc0000000000 R15: ffffffff8b2e28c0
FS:  0000000000000000(0000) GS:ffff888126695000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001000 CR3: 000000003cdee000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_srcu kernel/rcu/srcutree.c:1458 [inline]
 __synchronize_srcu+0x2c9/0x3e0 kernel/rcu/srcutree.c:1517
 fsnotify_mark_destroy_workfn+0x109/0x300 fs/notify/mark.c:996
 process_one_work kernel/workqueue.c:3275 [inline]
 process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3358
 worker_thread+0xa50/0xfc0 kernel/workqueue.c:3439
 kthread+0x388/0x470 kernel/kthread.c:467
 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>