------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(l->owner) WARNING: CPU: 0 PID: 8 at include/linux/local_lock_internal.h:30 local_lock_acquire include/linux/local_lock_internal.h:30 [inline] WARNING: CPU: 0 PID: 8 at include/linux/local_lock_internal.h:30 flush_slab mm/slub.c:3014 [inline] WARNING: CPU: 0 PID: 8 at include/linux/local_lock_internal.h:30 flush_cpu_slab+0x37f/0x410 mm/slub.c:3072 Modules linked in: CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.9.0-syzkaller-08654-g0cc6f45cecb4 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: slub_flushwq flush_cpu_slab RIP: 0010:local_lock_acquire include/linux/local_lock_internal.h:30 [inline] RIP: 0010:flush_slab mm/slub.c:3014 [inline] RIP: 0010:flush_cpu_slab+0x37f/0x410 mm/slub.c:3072 Code: ff e8 d5 f2 fb 08 e9 25 ff ff ff e8 cb f2 fb 08 e9 46 ff ff ff 90 48 c7 c6 0e 88 36 8d 48 c7 c7 5b 53 36 8d e8 62 9b 6f ff 90 <0f> 0b 90 90 e9 dd fe ff ff 90 48 c7 c6 17 88 36 8d 48 c7 c7 5b 53 RSP: 0018:ffffc900003a7c98 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffffe8ffad06c5b0 RCX: ffffffff81510469 RDX: ffff888015f22440 RSI: ffffffff81510476 RDI: 0000000000000001 RBP: ffff888059b93680 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 000000002d2d2d2d R12: 0000000000000200 R13: ffffe8ffad06c5d0 R14: 0000000000000000 R15: ffffc900003a7d80 FS: 0000000000000000(0000) GS:ffff88802c000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000f74c4020 CR3: 000000001c13c000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231 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