------------[ cut here ]------------ Looking for class "ork_completion)(&sdp->work)" with key __key.5, but found a different class "(work_completion)(&sdp->work)" with the same key WARNING: CPU: 0 PID: 8 at kernel/locking/lockdep.c:932 look_up_lock_class+0x133/0x140 kernel/locking/lockdep.c:932 Modules linked in: CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.9.0-syzkaller-08544-g4b377b4868ef #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: rcu_gp srcu_invoke_callbacks RIP: 0010:look_up_lock_class+0x133/0x140 kernel/locking/lockdep.c:932 Code: c7 c7 e0 b3 2c 8b e8 3c 25 74 f6 90 0f 0b 90 90 90 31 db eb be c6 05 8e aa ee 04 01 90 48 c7 c7 00 b7 2c 8b e8 1e 25 74 f6 90 <0f> 0b 90 90 e9 62 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc900003a7988 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffffffff941f8e58 RCX: ffffffff81510469 RDX: ffff888015f22440 RSI: ffffffff81510476 RDI: 0000000000000001 RBP: ffffffff94ac4880 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 20676e696b6f6f4c R12: ffffc900003a7d80 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff94ac3ba0 FS: 0000000000000000(0000) GS:ffff88802c000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f743a0c4 CR3: 000000002a136000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: register_lock_class+0xb1/0x1230 kernel/locking/lockdep.c:1284 __lock_acquire+0x111/0x3b30 kernel/locking/lockdep.c:5014 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 process_one_work+0x8c4/0x1ad0 kernel/workqueue.c:3207 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244