BUG: MAX_LOCKDEP_CHAINS too low!
turning off the locking correctness validator.
CPU: 0 PID: 4702 Comm: kworker/u4:9 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Workqueue: events_unbound btrfs_async_reclaim_metadata_space
Call trace:
 dump_backtrace+0x1c0/0x1ec 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:3772 [inline]
 validate_chain kernel/locking/lockdep.c:3793 [inline]
 __lock_acquire+0x1864/0x6800 kernel/locking/lockdep.c:5049
 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662
 do_write_seqcount_begin_nested include/linux/seqlock.h:515 [inline]
 do_write_seqcount_begin include/linux/seqlock.h:541 [inline]
 psi_group_change+0x240/0x1344 kernel/sched/psi.c:801
 psi_task_switch+0x380/0x608 kernel/sched/psi.c:999
 psi_sched_switch kernel/sched/stats.h:189 [inline]
 __schedule+0x1488/0x1b0c kernel/sched/core.c:6557
 schedule+0xc4/0x170 kernel/sched/core.c:6638
 schedule_timeout+0x194/0x2f4 kernel/time/timer.c:2168
 io_schedule_timeout+0x8c/0xf4 kernel/sched/core.c:8786
 do_wait_for_common+0x288/0x3f8 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common_io kernel/sched/completion.c:123 [inline]
 wait_for_completion_io_timeout+0x48/0x68 kernel/sched/completion.c:191
 submit_bio_wait+0x164/0x22c block/bio.c:1324
 blkdev_issue_discard+0xf4/0x184 block/blk-lib.c:107
 btrfs_issue_discard+0x4d4/0x530 fs/btrfs/extent-tree.c:1285
 do_discard_extent fs/btrfs/extent-tree.c:1322 [inline]
 btrfs_discard_extent+0x45c/0x790 fs/btrfs/extent-tree.c:1373
 btrfs_finish_extent_commit+0x1b8/0x55c fs/btrfs/extent-tree.c:2805
 btrfs_commit_transaction+0x1a50/0x29fc fs/btrfs/transaction.c:2528
 flush_space+0x7d8/0xc94 fs/btrfs/space-info.c:807
 btrfs_async_reclaim_metadata_space+0x25c/0x308 fs/btrfs/space-info.c:1080
 process_one_work+0x7f8/0x13a4 kernel/workqueue.c:2292
 worker_thread+0x8c4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850