BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 PID: 5017 Comm: syz-executor.1 Not tainted 5.6.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:2840 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:2914 [inline]
 validate_chain kernel/locking/lockdep.c:2935 [inline]
 __lock_acquire.cold+0x263/0x288 kernel/locking/lockdep.c:3954
 lock_acquire+0x197/0x420 kernel/locking/lockdep.c:4484
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xbf kernel/locking/spinlock.c:159
 debug_object_activate+0x131/0x470 lib/debugobjects.c:636
 debug_work_activate kernel/workqueue.c:489 [inline]
 __queue_work+0xcb/0x1280 kernel/workqueue.c:1406
 queue_work_on+0x18b/0x200 kernel/workqueue.c:1515
 queue_work include/linux/workqueue.h:507 [inline]
 schedule_work include/linux/workqueue.h:568 [inline]
 __vfree_deferred mm/vmalloc.c:2337 [inline]
 vfree_atomic+0xac/0xe0 mm/vmalloc.c:2355
 free_thread_stack kernel/fork.c:295 [inline]
 release_task_stack kernel/fork.c:440 [inline]
 put_task_stack+0x373/0x6b0 kernel/fork.c:451
 finish_task_switch+0x51e/0x750 kernel/sched/core.c:3251
 context_switch kernel/sched/core.c:3383 [inline]
 __schedule+0x93c/0x1f90 kernel/sched/core.c:4080
 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4337
 retint_kernel+0x1b/0x2b
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:759 [inline]
RIP: 0010:lock_acquire+0x209/0x420 kernel/locking/lockdep.c:4487
Code: 94 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 de 01 00 00 48 83 3d 03 18 1b 08 00 0f 84 5a 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 65 8b
RSP: 0018:ffffc90001737550 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff12e7698 RBX: ffff8880a3620200 RCX: 0000000000004787
RDX: dffffc0000000000 RSI: 1ffff920002e6e93 RDI: 0000000000000282
RBP: ffffffff89852320 R08: ffffffff8c053738 R09: fffffbfff180f777
R10: fffffbfff180f776 R11: ffffffff8c07bbb7 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 __fs_reclaim_acquire mm/page_alloc.c:4073 [inline]
 fs_reclaim_acquire.part.0+0x20/0x30 mm/page_alloc.c:4084
 slab_pre_alloc_hook mm/slab.h:562 [inline]
 slab_alloc mm/slab.c:3306 [inline]
 kmem_cache_alloc+0x26/0x730 mm/slab.c:3484
 proc_alloc_inode+0x18/0x1a0 fs/proc/inode.c:62
 alloc_inode+0x61/0x1e0 fs/inode.c:231
 new_inode_pseudo+0x14/0xe0 fs/inode.c:927
 new_inode+0x1b/0x40 fs/inode.c:956
 proc_pid_make_inode+0x22/0x230 fs/proc/base.c:1845
 proc_pid_instantiate+0x51/0x150 fs/proc/base.c:3324
 proc_pid_lookup+0x1da/0x340 fs/proc/base.c:3359
 proc_root_lookup+0x20/0x60 fs/proc/root.c:243
 __lookup_slow+0x250/0x480 fs/namei.c:1757
 lookup_slow fs/namei.c:1774 [inline]
 walk_component+0x774/0x1000 fs/namei.c:1915
 link_path_walk.part.0+0x540/0x1250 fs/namei.c:2238
 link_path_walk fs/namei.c:2172 [inline]
 path_openat+0x1ea/0x32b0 fs/namei.c:3606
 do_filp_open+0x192/0x260 fs/namei.c:3637
 do_sys_openat2+0x54c/0x740 fs/open.c:1146
 do_sys_open+0xc3/0x140 fs/open.c:1162
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4165c0
Code: 05 48 3d 01 f0 ff ff 0f 83 2d 19 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d cd 1e 87 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff
RSP: 002b:00007fff9c4a5508 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fff9c4a5534 RCX: 00000000004165c0
RDX: 00007fff9c4a553a RSI: 0000000000080001 RDI: 00000000004c23a4
RBP: 00007fff9c4a5530 R08: 0000000000000000 R09: 0000000000000004
R10: 0000000000000075 R11: 0000000000000246 R12: 00000000004c23a4
R13: 00007fff9c4a5a50 R14: 0000000000000000 R15: 00007fff9c4a5a60