BUG: MAX_STACK_TRACE_ENTRIES too low!
turning off the locking correctness validator.
CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 5.3.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 save_trace kernel/locking/lockdep.c:473 [inline]
 save_trace.isra.0.cold+0x14/0x19 kernel/locking/lockdep.c:458
 check_prev_add kernel/locking/lockdep.c:2447 [inline]
 check_prevs_add kernel/locking/lockdep.c:2507 [inline]
 validate_chain kernel/locking/lockdep.c:2897 [inline]
 __lock_acquire+0x2d2a/0x4c30 kernel/locking/lockdep.c:3880
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4412
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:159
 __debug_check_no_obj_freed lib/debugobjects.c:951 [inline]
 debug_check_no_obj_freed+0xc0/0x43f lib/debugobjects.c:994
 free_pages_prepare mm/page_alloc.c:1174 [inline]
 __free_pages_ok+0x26c/0xf50 mm/page_alloc.c:1420
 free_the_page mm/page_alloc.c:4776 [inline]
 __free_pages mm/page_alloc.c:4782 [inline]
 __free_pages+0x85/0xb0 mm/page_alloc.c:4779
 free_thread_stack kernel/fork.c:288 [inline]
 release_task_stack kernel/fork.c:428 [inline]
 put_task_stack+0xca/0x200 kernel/fork.c:439
 finish_task_switch+0x4ec/0x720 kernel/sched/core.c:3136
 context_switch kernel/sched/core.c:3257 [inline]
 __schedule+0x75d/0x1580 kernel/sched/core.c:3880
 preempt_schedule_irq+0xb5/0x160 kernel/sched/core.c:4131
 retint_kernel+0x1b/0x2b
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:768 [inline]
RIP: 0010:lock_acquire+0x20b/0x410 kernel/locking/lockdep.c:4415
Code: 8c 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 d3 01 00 00 48 83 3d 81 30 9a 07 00 0f 84 53 01 00 00 48 8b 7d c8 57 9d <0f> 1f 44 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 65 8b
RSP: 0018:ffff8880a989fce0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff11e5e8a RBX: ffff8880a98841c0 RCX: ffffffff81587502
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: 0000000000000286
RBP: ffff8880a989fd28 R08: 00000000000044a9 R09: fffffbfff14e9556
R10: ffff8880a9884a50 R11: ffff8880a98841c0 R12: ffff88809be026a8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 process_one_work+0x8ec/0x1740 kernel/workqueue.c:2244
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352