(syz-executor,4818,0):_ocfs2_free_suballoc_bits:2489 ERROR: status = -12
(syz-executor,4818,0):_ocfs2_free_clusters:2583 ERROR: status = -12
(syz-executor,4818,0):ocfs2_replay_truncate_records:5974 ERROR: status = -12
(syz-executor,4818,0):__ocfs2_flush_truncate_log:6055 ERROR: status = -12
(syz-executor,4818,0):ocfs2_truncate_log_shutdown:6320 ERROR: status = -12
============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz-executor/4818 is trying to acquire lock:
ffff88807b2cc990 (jbd2_handle){++++}-{0:0}, at: jbd2_journal_lock_updates+0x88/0x390 fs/jbd2/transaction.c:881

but task is already holding lock:
ffff88807b2cc990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x134c/0x15c0 fs/jbd2/transaction.c:462

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(jbd2_handle);
  lock(jbd2_handle);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by syz-executor/4818:
 #0: ffff88807b7620e0 (&type->s_umount_key#54){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
 #1: ffff88807b762650 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_replay_truncate_records fs/ocfs2/alloc.c:5938 [inline]
 #1: ffff88807b762650 (sb_internal#2){.+.+}-{0:0}, at: __ocfs2_flush_truncate_log+0x4a5/0x1110 fs/ocfs2/alloc.c:6052
 #2: ffff888078cd20e8 (&journal->j_trans_barrier){.+.+}-{3:3}, at: ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374
 #3: ffff88807b2cc990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x134c/0x15c0 fs/jbd2/transaction.c:462

stack backtrace:
CPU: 0 PID: 4818 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 __lock_acquire+0x1236/0x7d10 kernel/locking/lockdep.c:-1
 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623
 jbd2_journal_lock_updates+0xa4/0x390 fs/jbd2/transaction.c:881
 ocfs2_journal_shutdown+0x3f3/0xb10 fs/ocfs2/journal.c:1042
 ocfs2_dismount_volume+0x1f9/0x8a0 fs/ocfs2/super.c:1892
 generic_shutdown_super+0x130/0x300 fs/super.c:475
 kill_block_super+0x7c/0xe0 fs/super.c:1427
 deactivate_locked_super+0x93/0xf0 fs/super.c:335
 cleanup_mnt+0x42d/0x4e0 fs/namespace.c:1148
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4fa09a5157
Code: a2 c7 05 3c 84 23 00 00 00 00 00 eb 96 e8 e1 12 00 00 90 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 e8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fffdfde9fd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f4fa0a3833b RCX: 00007f4fa09a5157
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffdfdea090
RBP: 00007fffdfdea090 R08: 00007fffdfdeb090 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffdfdeb120
R13: 00007f4fa0a3833b R14: 000000000001883e R15: 00007fffdfdeb160
 </TASK>