------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 6358 at kernel/locking/lockdep.c:237 hlock_class kernel/locking/lockdep.c:237 [inline]
WARNING: CPU: 0 PID: 6358 at kernel/locking/lockdep.c:237 check_wait_context kernel/locking/lockdep.c:4855 [inline]
WARNING: CPU: 0 PID: 6358 at kernel/locking/lockdep.c:237 __lock_acquire+0x356/0xd80 kernel/locking/lockdep.c:5185
Modules linked in:
CPU: 0 UID: 0 PID: 6358 Comm: syz-executor Not tainted 6.15.0-rc2-syzkaller-g8ffd015db85f #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:hlock_class kernel/locking/lockdep.c:237 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4855 [inline]
RIP: 0010:__lock_acquire+0x356/0xd80 kernel/locking/lockdep.c:5185
Code: 89 c3 90 e8 4c 98 5a 03 85 c0 74 22 83 3d d5 02 c0 0e 00 75 19 90 48 c7 c7 1c a3 4e 8e 48 c7 c6 ad b7 4e 8e e8 db 81 e3 ff 90 <0f> 0b 90 90 90 31 c0 48 8b 74 24 08 41 89 d8 0f b6 98 c4 00 00 00
RSP: 0018:ffffc900039afa00 EFLAGS: 00010046

RAX: 824a870e68d9d000 RBX: 0000000000000001 RCX: ffff8880273a9e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880273a9e00 R08: ffffffff81826812 R09: 1ffff110170c47d2
R10: dffffc0000000000 R11: ffffed10170c47d3 R12: ffff8880273aa910
R13: ffff8880273a9e00 R14: 0000000000000000 R15: ffffe8ffffa7b678
FS:  000055557a428500(0000) GS:ffff888124fc9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c008ab8000 CR3: 00000000344a8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x116/0x2f0 kernel/locking/lockdep.c:5866
 __timer_delete_sync+0x14a/0x310 kernel/time/timer.c:1644
 cleanup_srcu_struct+0x2c8/0x5c0 kernel/rcu/srcutree.c:693
 bch2_fs_btree_iter_exit+0x3f0/0x480 fs/bcachefs/btree_iter.c:3608
 __bch2_fs_free fs/bcachefs/super.c:574 [inline]
 bch2_fs_release+0x230/0x7d0 fs/bcachefs/super.c:627
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x22f/0x480 lib/kobject.c:737
 deactivate_locked_super+0xc4/0x130 fs/super.c:473
 cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
 task_work_run+0x251/0x310 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa043f87057
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffcba378d08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fa04400180c RCX: 00007fa043f87057
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffcba378dc0
RBP: 00007ffcba378dc0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcba379e40
R13: 00007fa04400180c R14: 00007ffcba379e80 R15: 0000000000000012
 </TASK>