BTRFS info (device loop1): last unmount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d
BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 1 PID: 10386 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3844 [inline]
 validate_chain kernel/locking/lockdep.c:3865 [inline]
 __lock_acquire+0x2618/0x7280 kernel/locking/lockdep.c:5171
 lock_acquire+0x210/0x63c kernel/locking/lockdep.c:5790
 _raw_spin_lock_nested+0x5c/0x78 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested kernel/sched/core.c:538 [inline]
 raw_spin_rq_lock kernel/sched/sched.h:1362 [inline]
 rq_lock kernel/sched/sched.h:1652 [inline]
 ttwu_queue kernel/sched/core.c:3903 [inline]
 try_to_wake_up+0x3f0/0xcb4 kernel/sched/core.c:4228
 wake_up_process+0x18/0x24 kernel/sched/core.c:4362
 wake_up_worker kernel/workqueue.c:859 [inline]
 insert_work+0x2a4/0x37c kernel/workqueue.c:1369
 __queue_work+0xd00/0x1280 kernel/workqueue.c:1520
 queue_work_on+0xc0/0x164 kernel/workqueue.c:1548
 queue_work include/linux/workqueue.h:515 [inline]
 loop_queue_work drivers/block/loop.c:893 [inline]
 loop_queue_rq+0x91c/0xa48 drivers/block/loop.c:1874
 __blk_mq_issue_directly block/blk-mq.c:2643 [inline]
 __blk_mq_try_issue_directly+0x3f8/0x63c block/blk-mq.c:2696
 blk_mq_try_issue_directly+0x3c/0x1e0 block/blk-mq.c:2720
 blk_mq_submit_bio+0xfbc/0x1ad8 block/blk-mq.c:3058
 __submit_bio+0x1d8/0x260 block/blk-core.c:591
 __submit_bio_noacct_mq block/blk-core.c:668 [inline]
 submit_bio_noacct_nocheck+0x65c/0xa1c block/blk-core.c:697
 submit_bio_noacct+0xc5c/0x1660 block/blk-core.c:808
 submit_bio+0x29c/0x3d0 block/blk-core.c:853
 write_dev_supers fs/btrfs/disk-io.c:4085 [inline]
 write_all_supers+0x1f7c/0x36c0 fs/btrfs/disk-io.c:4389
 btrfs_commit_transaction+0x18f4/0x28e4 fs/btrfs/transaction.c:2532
 btrfs_commit_super+0xb8/0xcc fs/btrfs/disk-io.c:4519
 close_ctree+0x41c/0xa84 fs/btrfs/disk-io.c:4726
 btrfs_put_super+0x70/0x80 fs/btrfs/super.c:397
 generic_shutdown_super+0x138/0x32c fs/super.c:501
 kill_anon_super+0x4c/0x80 fs/super.c:1139
 btrfs_kill_super+0x44/0x5c fs/btrfs/super.c:2449
 deactivate_locked_super+0xb4/0x128 fs/super.c:332
 deactivate_super+0xe4/0x104 fs/super.c:363
 cleanup_mnt+0x3a8/0x430 fs/namespace.c:1191
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198
 task_work_run+0x1f4/0x280 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x20f8/0x2c84 arch/arm64/kernel/signal.c:1151
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x12c arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585