BUG: MAX_LOCKDEP_ENTRIES too low!
turning off the locking correctness validator.
CPU: 2 PID: 18100 Comm: systemd-udevd Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 alloc_list_entry kernel/locking/lockdep.c:1353 [inline]
 add_lock_to_list.constprop.0.cold+0x11/0x18 kernel/locking/lockdep.c:1374
 check_prev_add kernel/locking/lockdep.c:3007 [inline]
 check_prevs_add kernel/locking/lockdep.c:3060 [inline]
 validate_chain kernel/locking/lockdep.c:3675 [inline]
 __lock_acquire+0x2f37/0x54c0 kernel/locking/lockdep.c:4901
 lock_acquire kernel/locking/lockdep.c:5511 [inline]
 lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5476
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:159
 remove_entity_load_avg+0x76/0x250 kernel/sched/fair.c:3861
 finish_task_switch.isra.0+0x5b8/0x810 kernel/sched/core.c:4222
 context_switch kernel/sched/core.c:4325 [inline]
 __schedule+0x919/0x21b0 kernel/sched/core.c:5073
 schedule+0xcf/0x270 kernel/sched/core.c:5152
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5211
 __mutex_lock_common kernel/locking/mutex.c:1026 [inline]
 __mutex_lock+0x81f/0x1120 kernel/locking/mutex.c:1096
 lo_open+0x1a/0x130 drivers/block/loop.c:1889
 __blkdev_get+0x135/0xa30 fs/block_dev.c:1306
 blkdev_get_by_dev fs/block_dev.c:1458 [inline]
 blkdev_get_by_dev+0x26c/0x600 fs/block_dev.c:1426
 blkdev_open+0x154/0x2b0 fs/block_dev.c:1555
 do_dentry_open+0x4b9/0x11b0 fs/open.c:826
 do_open fs/namei.c:3367 [inline]
 path_openat+0x1c0e/0x27e0 fs/namei.c:3500
 do_filp_open+0x190/0x3d0 fs/namei.c:3527
 do_sys_openat2+0x16d/0x420 fs/open.c:1187
 do_sys_open fs/open.c:1203 [inline]
 __do_sys_open fs/open.c:1211 [inline]
 __se_sys_open fs/open.c:1207 [inline]
 __x64_sys_open+0x119/0x1c0 fs/open.c:1207
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f6bd5ea7840
Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24
RSP: 002b:00007ffec3318b38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000055908eef4e30 RCX: 00007f6bd5ea7840
RDX: 000055908d244fe3 RSI: 00000000000a0800 RDI: 000055908eef8890
RBP: 00007ffec3318cb0 R08: 000055908d244670 R09: 0000000000000010
R10: 000055908d244d0c R11: 0000000000000246 R12: 00007ffec3318c00
R13: 000055908eef06e0 R14: 0000000000000003 R15: 000000000000000e