BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 16068 Comm: syz-executor.0 Not tainted 5.8.0-rc5-next-20200716-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+0x18f/0x20d lib/dump_stack.c:118
 add_chain_cache kernel/locking/lockdep.c:3063 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3162 [inline]
 validate_chain kernel/locking/lockdep.c:3183 [inline]
 __lock_acquire.cold+0x11/0x3f8 kernel/locking/lockdep.c:4380
 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 __queue_work+0x3b4/0xff0 kernel/workqueue.c:1449
 queue_work_on+0x18b/0x200 kernel/workqueue.c:1518
 queue_work include/linux/workqueue.h:507 [inline]
 schedule_work include/linux/workqueue.h:568 [inline]
 __vfree_deferred mm/vmalloc.c:2292 [inline]
 vfree_atomic+0xac/0xe0 mm/vmalloc.c:2310
 free_thread_stack kernel/fork.c:290 [inline]
 release_task_stack kernel/fork.c:425 [inline]
 put_task_stack+0x223/0x450 kernel/fork.c:436
 finish_task_switch+0x52a/0x750 kernel/sched/core.c:3316
 context_switch kernel/sched/core.c:3448 [inline]
 __schedule+0x8bc/0x1e80 kernel/sched/core.c:4169
 preempt_schedule_notrace+0x92/0x110 kernel/sched/core.c:4398
 preempt_schedule_notrace_thunk+0x16/0x31 arch/x86/entry/thunk_64.S:41
 rcu_is_watching+0x8d/0xb0 kernel/rcu/tree.c:1094
 rcu_read_unlock include/linux/rcupdate.h:684 [inline]
 prepend_path+0x930/0xb20 fs/d_path.c:142
 d_absolute_path+0xfa/0x180 fs/d_path.c:201
 tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
 tomoyo_realpath_from_path+0x282/0x620 security/tomoyo/realpath.c:276
 tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
 tomoyo_path_number_perm+0x1cb/0x4d0 security/tomoyo/file.c:723
 tomoyo_path_mknod+0x10d/0x190 security/tomoyo/tomoyo.c:240
 security_path_mknod+0xf9/0x170 security/security.c:1086
 may_o_create fs/namei.c:2925 [inline]
 lookup_open.isra.0+0x431/0x1350 fs/namei.c:3066
 open_last_lookups fs/namei.c:3175 [inline]
 path_openat+0x96d/0x2720 fs/namei.c:3363
 do_filp_open+0x17e/0x3c0 fs/namei.c:3393
 do_sys_openat2+0x16d/0x3e0 fs/open.c:1173
 do_sys_open fs/open.c:1189 [inline]
 ksys_open include/linux/syscalls.h:1398 [inline]
 __do_sys_open fs/open.c:1195 [inline]
 __se_sys_open fs/open.c:1193 [inline]
 __x64_sys_open+0x119/0x1c0 fs/open.c:1193
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45c1d9
Code: Bad RIP value.
RSP: 002b:00007f12a3bf5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000001fe00 RCX: 000000000045c1d9
RDX: 0000000000000000 RSI: 00000000000040c2 RDI: 00000000200000c0
RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffc615632af R14: 00007f12a3bf69c0 R15: 000000000078bf0c