BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 0 UID: 0 PID: 8132 Comm: syz.2.248 Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 add_chain_cache kernel/locking/lockdep.c:-1 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3858 [inline]
 validate_chain kernel/locking/lockdep.c:3879 [inline]
 __lock_acquire+0xf9c/0x30a4 kernel/locking/lockdep.c:5240
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871
 _raw_spin_lock_nested+0x50/0x6c kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested kernel/sched/core.c:606 [inline]
 raw_spin_rq_lock kernel/sched/sched.h:1532 [inline]
 rq_lock kernel/sched/sched.h:1856 [inline]
 ttwu_queue kernel/sched/core.c:4013 [inline]
 try_to_wake_up+0x434/0xdf0 kernel/sched/core.c:4343
 wake_up_process+0x18/0x24 kernel/sched/core.c:4476
 kick_pool+0x3e0/0x58c kernel/workqueue.c:1279
 __queue_work+0xde4/0x1230 kernel/workqueue.c:2342
 queue_work_on+0xdc/0x18c kernel/workqueue.c:2392
 queue_work include/linux/workqueue.h:662 [inline]
 loop_queue_work drivers/block/loop.c:852 [inline]
 loop_queue_rq+0x944/0xaa8 drivers/block/loop.c:1856
 __blk_mq_issue_directly block/blk-mq.c:2693 [inline]
 blk_mq_request_issue_directly+0x2c0/0x560 block/blk-mq.c:2780
 blk_mq_issue_direct+0x254/0x558 block/blk-mq.c:2801
 blk_mq_dispatch_queue_requests+0x568/0x674 block/blk-mq.c:2876
 blk_mq_flush_plug_list+0x370/0x488 block/blk-mq.c:2959
 __blk_flush_plug+0x330/0x408 block/blk-core.c:1220
 blk_finish_plug block/blk-core.c:1247 [inline]
 __submit_bio+0x3f4/0x4d8 block/blk-core.c:649
 __submit_bio_noacct_mq block/blk-core.c:722 [inline]
 submit_bio_noacct_nocheck+0x390/0xaac block/blk-core.c:751
 submit_bio_noacct+0xc84/0x176c block/blk-core.c:874
 submit_bio+0x354/0x4d4 block/blk-core.c:916
 read_back_super fs/bcachefs/super-io.c:993 [inline]
 bch2_write_super+0x114c/0x28dc fs/bcachefs/super-io.c:1125
 bch2_mark_replicas_slowpath+0x258/0x498 fs/bcachefs/replicas.c:338
 bch2_mark_replicas+0x54/0x58 fs/bcachefs/replicas.c:362
 bch2_accounting_update_sb_one fs/bcachefs/disk_accounting.c:328 [inline]
 bch2_accounting_update_sb+0x358/0xa68 fs/bcachefs/disk_accounting.c:341
 bch2_trans_commit_error+0x1b0/0x11a0 fs/bcachefs/btree_trans_commit.c:920
 __bch2_trans_commit+0x17a4/0x625c fs/bcachefs/btree_trans_commit.c:1104
 bch2_trans_commit fs/bcachefs/btree_update.h:241 [inline]
 bch2_extent_update+0x2d8/0x7e8 fs/bcachefs/io_write.c:359
 bch2_extent_fallocate+0x618/0x17e0 fs/bcachefs/io_misc.c:111
 __bchfs_fallocate+0xb48/0x1080 fs/bcachefs/fs-io.c:723
 bchfs_fallocate+0x28c/0x538 fs/bcachefs/fs-io.c:789
 bch2_fallocate_dispatch+0x2a0/0x434 fs/bcachefs/fs-io.c:836
 vfs_fallocate+0x5cc/0x73c fs/open.c:341
 ksys_fallocate fs/open.c:365 [inline]
 __do_sys_fallocate fs/open.c:370 [inline]
 __se_sys_fallocate fs/open.c:368 [inline]
 __arm64_sys_fallocate+0xbc/0x10c fs/open.c:368
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
bcachefs (loop2): shutdown by ioctl type 1emergency read only at seq 2