======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz-executor/7494 is trying to acquire lock:
ffff888063a93dc0 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
ffff888063a93dc0 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2804 [inline]
ffff888063a93dc0 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_free_suballoc_bits+0x1510/0x27a0 fs/ocfs2/suballoc.c:2958

but task is already holding lock:
ffff888035f67918 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x97/0x200 kernel/locking/rwsem.c:1574
       ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369
       ocfs2_modify_bh+0xe3/0x4d0 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x146b/0x1830 fs/ocfs2/quota_local.c:767
       dquot_load_quota_sb+0x76f/0xb70 fs/quota/dquot.c:2416
       dquot_load_quota_inode+0x2dc/0x5d0 fs/quota/dquot.c:2453
       ocfs2_enable_quotas+0x1c3/0x4a0 fs/ocfs2/super.c:930
       ocfs2_fill_super+0x5451/0x6950 fs/ocfs2/super.c:1140
       get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1872
       vfs_get_tree+0x92/0x2a0 fs/super.c:1932
       fc_mount fs/namespace.c:1278 [inline]
       do_new_mount_fc fs/namespace.c:3885 [inline]
       do_new_mount+0x325/0xb00 fs/namespace.c:3961
       do_mount fs/namespace.c:4325 [inline]
       __do_sys_mount fs/namespace.c:4543 [inline]
       __se_sys_mount+0x31d/0x420 fs/namespace.c:4520
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#3){.+.+}-{0:0}:
       percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
       percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
       __sb_start_write include/linux/fs/super.h:19 [inline]
       sb_start_intwrite include/linux/fs/super.h:177 [inline]
       ocfs2_start_trans+0x2ac/0x700 fs/ocfs2/journal.c:367
       ocfs2_shutdown_local_alloc+0x1ef/0xa50 fs/ocfs2/localalloc.c:417
       ocfs2_dismount_volume+0x1e2/0x820 fs/ocfs2/super.c:1824
       generic_shutdown_super+0x13d/0x2d0 fs/super.c:751
       kill_block_super+0x44/0xa0 fs/super.c:1903
       deactivate_locked_super+0xbe/0x110 fs/super.c:586
       cleanup_mnt+0x204/0x2a0 fs/namespace.c:1392
       task_work_run+0x1d9/0x270 kernel/task_work.c:233
       resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
       __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
       exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101
       __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
       syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
       syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
       do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3209 [inline]
       check_prevs_add kernel/locking/lockdep.c:3328 [inline]
       validate_chain kernel/locking/lockdep.c:3952 [inline]
       __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
       lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
       down_write+0x3a/0x50 kernel/locking/rwsem.c:1631
       inode_lock include/linux/fs.h:1024 [inline]
       _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2804 [inline]
       _ocfs2_free_suballoc_bits+0x1510/0x27a0 fs/ocfs2/suballoc.c:2958
       ocfs2_free_suballoc_bits fs/ocfs2/suballoc.c:2972 [inline]
       ocfs2_free_dinode+0xb1/0xe0 fs/ocfs2/suballoc.c:2987
       ocfs2_remove_inode fs/ocfs2/inode.c:808 [inline]
       ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline]
       ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline]
       ocfs2_evict_inode+0x1dee/0x4360 fs/ocfs2/inode.c:1333
       evict+0x624/0xb50 fs/inode.c:822
       d_delete_notify include/linux/fsnotify.h:381 [inline]
       vfs_rmdir+0x416/0x6b0 fs/namei.c:5557
       filename_rmdir+0x292/0x520 fs/namei.c:5601
       __do_sys_unlinkat fs/namei.c:5776 [inline]
       __se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5769
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE] --> sb_internal#3 --> &journal->j_trans_barrier

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(&journal->j_trans_barrier);
                               lock(sb_internal#3);
                               lock(&journal->j_trans_barrier);
  lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]);

 *** DEADLOCK ***

locks held by syz-executor/7494: 8, last CPU#0:
 #0: ffff88803694e510 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:527
 #1: ffff888063a53dc0 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
 #1: ffff888063a53dc0 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2947 [inline]
 #1: ffff888063a53dc0 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2971 [inline]
 #1: ffff888063a53dc0 (&type->i_mutex_dir_key#12/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5594
 #2: ffff88803cab4e30 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875
 #3: ffff888063a90b80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #3: ffff888063a90b80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:888 [inline]
 #3: ffff888063a90b80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline]
 #3: ffff888063a90b80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe39/0x4360 fs/ocfs2/inode.c:1333
 #4: ffff888063a58b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #4: ffff888063a58b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode fs/ocfs2/inode.c:767 [inline]
 #4: ffff888063a58b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline]
 #4: ffff888063a58b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline]
 #4: ffff888063a58b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x1489/0x4360 fs/ocfs2/inode.c:1333
 #5: ffff88803694e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_remove_inode fs/ocfs2/inode.c:776 [inline]
 #5: ffff88803694e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline]
 #5: ffff88803694e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline]
 #5: ffff88803694e800 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_evict_inode+0x156b/0x4360 fs/ocfs2/inode.c:1333
 #6: ffff888035f67918 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369
 #7: ffff88803cf60bb0 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444

stack backtrace:
CPU: 0 UID: 0 PID: 7494 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087
 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219
 check_prev_add kernel/locking/lockdep.c:3209 [inline]
 check_prevs_add kernel/locking/lockdep.c:3328 [inline]
 validate_chain kernel/locking/lockdep.c:3952 [inline]
 __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
 down_write+0x3a/0x50 kernel/locking/rwsem.c:1631
 inode_lock include/linux/fs.h:1024 [inline]
 _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2804 [inline]
 _ocfs2_free_suballoc_bits+0x1510/0x27a0 fs/ocfs2/suballoc.c:2958
 ocfs2_free_suballoc_bits fs/ocfs2/suballoc.c:2972 [inline]
 ocfs2_free_dinode+0xb1/0xe0 fs/ocfs2/suballoc.c:2987
 ocfs2_remove_inode fs/ocfs2/inode.c:808 [inline]
 ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline]
 ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline]
 ocfs2_evict_inode+0x1dee/0x4360 fs/ocfs2/inode.c:1333
 evict+0x624/0xb50 fs/inode.c:822
 d_delete_notify include/linux/fsnotify.h:381 [inline]
 vfs_rmdir+0x416/0x6b0 fs/namei.c:5557
 filename_rmdir+0x292/0x520 fs/namei.c:5601
 __do_sys_unlinkat fs/namei.c:5776 [inline]
 __se_sys_unlinkat+0x71/0x1a0 fs/namei.c:5769
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31dfe8d677
Code: 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffec5e93918 EFLAGS: 00000207 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f31dfe8d677
RDX: 0000000000000200 RSI: 00007ffec5e94ac0 RDI: 00000000ffffff9c
RBP: 00007f31dff24cf3 R08: 0000000000008560 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffec5e94ac0
R13: 00007f31dff24cf3 R14: 000000000004f628 R15: 00007ffec5e96c80
 </TASK>