BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 3906 Comm: systemd-udevd 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
 update_cfs_rq_load_avg kernel/sched/fair.c:3655 [inline]
 update_load_avg+0x9ef/0x1900 kernel/sched/fair.c:3792
 enqueue_entity+0xbe/0x1cf0 kernel/sched/fair.c:4219
 enqueue_task_fair+0x197/0x1b00 kernel/sched/fair.c:5495
 enqueue_task kernel/sched/core.c:1297 [inline]
 activate_task kernel/sched/core.c:1319 [inline]
 ttwu_do_activate+0x1ad/0x4b0 kernel/sched/core.c:2239
 ttwu_queue kernel/sched/core.c:2404 [inline]
 try_to_wake_up+0x5f4/0x1360 kernel/sched/core.c:2655
 wake_up_worker kernel/workqueue.c:837 [inline]
 insert_work+0x298/0x370 kernel/workqueue.c:1340
 __queue_work+0x5fa/0xff0 kernel/workqueue.c:1491
 queue_work_on+0x18b/0x200 kernel/workqueue.c:1518
 lru_add_drain_all+0x332/0x590 mm/swap.c:802
 invalidate_bdev+0x96/0xd0 fs/block_dev.c:96
 blk_drop_partitions+0xba/0x1c0 block/partitions/core.c:626
 bdev_disk_changed+0x210/0x370 fs/block_dev.c:1464
 blkdev_reread_part block/ioctl.c:103 [inline]
 blkdev_common_ioctl+0x13d1/0x1760 block/ioctl.c:549
 blkdev_ioctl+0x1da/0x700 block/ioctl.c:618
 block_ioctl+0xf9/0x140 fs/block_dev.c:1949
 vfs_ioctl fs/ioctl.c:48 [inline]
 ksys_ioctl+0x11a/0x180 fs/ioctl.c:753
 __do_sys_ioctl fs/ioctl.c:762 [inline]
 __se_sys_ioctl fs/ioctl.c:760 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f73d367f017
Code: Bad RIP value.
RSP: 002b:00007ffcc128b7d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ffcc128b870 RCX: 00007f73d367f017
RDX: 0000000000000000 RSI: 000000000000125f RDI: 000000000000000e
RBP: 00007ffcc128bd00 R08: 0000000000000000 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcc128b980
R13: 000055b94a9cc010 R14: 000055b94a9e1870 R15: 00007ffcc128b850
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table
ldm_validate_partition_table(): Disk read failed.
Dev loop0: unable to read RDB block 0
 loop0: unable to read partition table