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Message-ID: <000000000000d4795d061d36d825@google.com>
Date: Sun, 14 Jul 2024 08:34:23 -0700
From: syzbot <syzbot+d79987254280f6484dd2@...kaller.appspotmail.com>
To: bfoster@...hat.com, clm@...com, dsterba@...e.com, josef@...icpanda.com, 
	kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (5)

Hello,

syzbot found the following issue on:

HEAD commit:    2ccbdf43d5e7 Merge tag 'for-linus' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13a10a61980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b8786f381e62940f
dashboard link: https://syzkaller.appspot.com/bug?extid=d79987254280f6484dd2
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13fb0f02980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14d3d851980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-2ccbdf43.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c40c1cd990d2/vmlinux-2ccbdf43.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a2a94050804e/bzImage-2ccbdf43.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/56eac6c758d4/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d79987254280f6484dd2@...kaller.appspotmail.com

BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!
turning off the locking correctness validator.
CPU: 1 PID: 5233 Comm: kworker/1:1 Not tainted 6.10.0-rc3-syzkaller-00044-g2ccbdf43d5e7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: bcachefs_write_ref bch2_delete_dead_snapshots_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
 add_chain_cache kernel/locking/lockdep.c:3735 [inline]
 lookup_chain_cache_add kernel/locking/lockdep.c:3816 [inline]
 validate_chain kernel/locking/lockdep.c:3837 [inline]
 __lock_acquire+0x2ea6/0x3b30 kernel/locking/lockdep.c:5137
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
 raw_spin_rq_lock kernel/sched/sched.h:1406 [inline]
 rq_lock kernel/sched/sched.h:1702 [inline]
 ttwu_queue kernel/sched/core.c:4055 [inline]
 try_to_wake_up+0x514/0x13e0 kernel/sched/core.c:4378
 kick_pool+0x2a0/0x7a0 kernel/workqueue.c:1279
 __queue_work+0x94d/0x1020 kernel/workqueue.c:2360
 queue_work_on+0x11a/0x140 kernel/workqueue.c:2410
 queue_work include/linux/workqueue.h:621 [inline]
 __bch2_btree_node_write+0x1fc1/0x2d60 fs/bcachefs/btree_io.c:2232
 bch2_btree_node_write+0x127/0x2f0 fs/bcachefs/btree_io.c:2307
 btree_split+0x1087/0x3010 fs/bcachefs/btree_update_interior.c:1706
 bch2_btree_split_leaf+0x108/0x770 fs/bcachefs/btree_update_interior.c:1857
 bch2_trans_commit_error+0x327/0xd00 fs/bcachefs/btree_trans_commit.c:918
 __bch2_trans_commit+0x4eb1/0x7ad0 fs/bcachefs/btree_trans_commit.c:1138
 bch2_trans_commit fs/bcachefs/btree_update.h:170 [inline]
 bch2_delete_dead_snapshots+0x1b07/0x4e50 fs/bcachefs/snapshot.c:1617
 bch2_delete_dead_snapshots_work+0x20/0x160 fs/bcachefs/snapshot.c:1690
 process_one_work+0x9fb/0x1b60 kernel/workqueue.c:3231
 process_scheduled_works kernel/workqueue.c:3312 [inline]
 worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting keys from dying snapshots erofs_trans_commit
bcachefs (loop0): bch2_delete_dead_snapshots(): error erofs_trans_commit
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting keys from dying snapshots erofs_trans_commit
bcachefs (loop0): bch2_delete_dead_snapshots(): error erofs_trans_commit
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting keys from dying snapshots erofs_trans_commit
bcachefs (loop0): bch2_delete_dead_snapshots(): error erofs_trans_commit
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting keys from dying snapshots erofs_trans_commit
bcachefs (loop0): bch2_delete_dead_snapshots(): error erofs_trans_commit
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error deleting snapshot 4294967295 ENOENT_bkey_type_mismatch
bcachefs (loop0): bch2_delete_dead_snapshots(): error ENOENT_bkey_type_mismatch


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

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