syzbot

bcachefs (da441363-bb6a-4ab9-999b-c1f40db4fee2): initializing new filesystem
bcachefs (da441363-bb6a-4ab9-999b-c1f40db4fee2): going read-write
bcachefs (da441363-bb6a-4ab9-999b-c1f40db4fee2): marking superblocks
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(!test_bit(class_idx, lock_classes_in_use))
WARNING: CPU: 0 PID: 8468 at kernel/locking/lockdep.c:5210 __lock_acquire+0xc0c/0xd20 kernel/locking/lockdep.c:5210
Modules linked in:
CPU: 0 UID: 0 PID: 8468 Comm: syz.6.544 Not tainted 6.16.0-syzkaller-00857-gced1b9e0392d #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__lock_acquire+0xc0c/0xd20 kernel/locking/lockdep.c:5210
Code: ff ff 90 e8 36 16 23 03 85 c0 74 22 83 3d af dd 03 0e 00 75 19 90 48 c7 c7 d9 8c b8 8d 48 c7 c6 93 33 a0 8d e8 b5 cb e5 ff 90 <0f> 0b 90 90 90 e9 8f 00 00 00 90 0f 0b 90 e9 8d fe ff ff 90 e8 fb
RSP: 0018:ffffc90004c4e458 EFLAGS: 00010046
RAX: e3f1807d00381900 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9001e1f5000 RSI: 0000000000073d7a RDI: 0000000000073d7b
RBP: 00000000000000f2 R08: ffff8880b8624293 R09: 1ffff110170c4852
R10: dffffc0000000000 R11: ffffed10170c4853 R12: 0000000000008000
R13: 0000000000000000 R14: ffff888025dc4790 R15: 0000000000000000
FS:  00007fe09b5856c0(0000) GS:ffff888125c07000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000020f030 CR3: 0000000041308000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
 __raw_spin_trylock include/linux/spinlock_api_smp.h:90 [inline]
 _raw_spin_trylock+0x47/0x80 kernel/locking/spinlock.c:138
 spin_lock_irqsave_sdp_contention kernel/rcu/srcutree.c:375 [inline]
 srcu_gp_start_if_needed+0x31f/0x11d0 kernel/rcu/srcutree.c:1275
 __rcu_pending_enqueue fs/bcachefs/rcu_pending.c:498 [inline]
 rcu_pending_enqueue+0x729/0x880 fs/bcachefs/rcu_pending.c:531
 bkey_cached_free_noassert fs/bcachefs/btree_key_cache.c:115 [inline]
 bkey_cached_free+0x13a/0x1d0 fs/bcachefs/btree_key_cache.c:129
 bch2_btree_key_cache_drop+0x12b/0x7d0 fs/bcachefs/btree_key_cache.c:637
 bch2_trans_commit_write_locked fs/bcachefs/btree_trans_commit.c:785 [inline]
 do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:854 [inline]
 __bch2_trans_commit+0x7463/0x8870 fs/bcachefs/btree_trans_commit.c:1085
 bch2_trans_commit fs/bcachefs/btree_update.h:241 [inline]
 bch2_trans_mark_metadata_bucket+0x566/0x1260 fs/bcachefs/buckets.c:1091
 bch2_trans_mark_metadata_sectors fs/bcachefs/buckets.c:1108 [inline]
 __bch2_trans_mark_dev_sb fs/bcachefs/buckets.c:1148 [inline]
 bch2_trans_mark_dev_sb+0x3ed/0x7c0 fs/bcachefs/buckets.c:1176
 bch2_trans_mark_dev_sbs_flags+0x49c/0x500 fs/bcachefs/buckets.c:1186
 bch2_fs_initialize+0xd47/0x1550 fs/bcachefs/recovery.c:1235
 bch2_fs_start+0xaa0/0xda0 fs/bcachefs/super.c:1214
 bch2_fs_get_tree+0xb39/0x1520 fs/bcachefs/fs.c:2488
 vfs_get_tree+0x92/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805
 do_mount fs/namespace.c:4133 [inline]
 __do_sys_mount fs/namespace.c:4344 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4321
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe09a79014a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe09b584e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe09b584ef0 RCX: 00007fe09a79014a
RDX: 00002000000000c0 RSI: 0000200000000180 RDI: 00007fe09b584eb0
RBP: 00002000000000c0 R08: 00007fe09b584ef0 R09: 0000000000000053
R10: 0000000000000053 R11: 0000000000000246 R12: 0000200000000180
R13: 00007fe09b584eb0 R14: 0000000000005a53 R15: 0000200000000000
 </TASK>