BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 16878 Comm: kworker/u4:10 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bond3151 bond_alb_monitor Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 add_chain_cache kernel/locking/lockdep.c:3637 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:3736 [inline] validate_chain kernel/locking/lockdep.c:3757 [inline] __lock_acquire.cold+0x372/0x3ab kernel/locking/lockdep.c:5015 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 do_write_seqcount_begin_nested include/linux/seqlock.h:520 [inline] do_write_seqcount_begin include/linux/seqlock.h:545 [inline] psi_group_change+0x135/0xc20 kernel/sched/psi.c:703 psi_enqueue kernel/sched/stats.h:82 [inline] enqueue_task kernel/sched/core.c:1972 [inline] activate_task kernel/sched/core.c:2001 [inline] ttwu_do_activate+0x2b4/0x7b0 kernel/sched/core.c:3577 ttwu_queue kernel/sched/core.c:3774 [inline] try_to_wake_up+0x4ff/0x1570 kernel/sched/core.c:4097 wake_up_worker kernel/workqueue.c:855 [inline] insert_work+0x2a0/0x370 kernel/workqueue.c:1368 __queue_work+0x5ca/0xee0 kernel/workqueue.c:1519 queue_work_on+0xee/0x110 kernel/workqueue.c:1546 queue_work include/linux/workqueue.h:501 [inline] schedule_work include/linux/workqueue.h:562 [inline] __vfree_deferred mm/vmalloc.c:2643 [inline] vfree_atomic+0xac/0xe0 mm/vmalloc.c:2661 free_thread_stack kernel/fork.c:292 [inline] release_task_stack kernel/fork.c:432 [inline] put_task_stack+0x2e0/0x4e0 kernel/fork.c:443 finish_task_switch.isra.0+0x8ad/0xb80 kernel/sched/core.c:4852 context_switch kernel/sched/core.c:4943 [inline] __schedule+0xb4c/0x5960 kernel/sched/core.c:6287 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6687 irqentry_exit+0x31/0x80 kernel/entry/common.c:425 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_acquire+0x1ef/0x510 kernel/locking/lockdep.c:5593 Code: b2 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 f6 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc9000521fc30 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92000a43f88 RCX: 0000000000000001 RDX: 1ffff1101083d863 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff8f0496bf R10: fffffbfff1e092d7 R11: 1ffffffff1e8f621 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888095f03938 R15: 0000000000000000 process_one_work+0x904/0x16b0 kernel/workqueue.c:2272 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: b2 a5 mov $0xa5,%dl 2: 7e 83 jle 0xffffff87 4: f8 clc 5: 01 0f add %ecx,(%rdi) 7: 85 b4 02 00 00 9c 58 test %esi,0x589c0000(%rdx,%rax,1) e: f6 c4 02 test $0x2,%ah 11: 0f 85 9f 02 00 00 jne 0x2b6 17: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp) 1d: 74 01 je 0x20 1f: fb sti 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction 2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx) 3b: 00 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 84 .byte 0x84 3f: 24 .byte 0x24