======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz-executor124/5594 is trying to acquire lock:
ffff888032964e80 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
ffff888032964e80 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: _ocfs2_reclaim_suballoc_to_main fs/ocfs2/suballoc.c:2804 [inline]
ffff888032964e80 (&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:
ffff88801de80118 (&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_block_group_alloc fs/ocfs2/suballoc.c:801 [inline]
       ocfs2_reserve_suballoc_bits+0x7b7/0x4850 fs/ocfs2/suballoc.c:950
       ocfs2_reserve_new_inode+0x4f8/0xd10 fs/ocfs2/suballoc.c:1190
       ocfs2_mknod+0x888/0x21a0 fs/ocfs2/namei.c:308
       ocfs2_mkdir+0x180/0x430 fs/ocfs2/namei.c:662
       vfs_mkdir+0x408/0x620 fs/namei.c:5410
       filename_mkdirat+0x289/0x520 fs/namei.c:5443
       __do_sys_mkdirat fs/namei.c:5464 [inline]
       __se_sys_mkdirat+0x35/0x150 fs/namei.c:5461
       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#2){.+.+}-{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_block_group_alloc fs/ocfs2/suballoc.c:801 [inline]
       ocfs2_reserve_suballoc_bits+0x7b7/0x4850 fs/ocfs2/suballoc.c:950
       ocfs2_reserve_new_inode+0x4f8/0xd10 fs/ocfs2/suballoc.c:1190
       ocfs2_mknod+0x888/0x21a0 fs/ocfs2/namei.c:308
       ocfs2_mkdir+0x180/0x430 fs/ocfs2/namei.c:662
       vfs_mkdir+0x408/0x620 fs/namei.c:5410
       filename_mkdirat+0x289/0x520 fs/namei.c:5443
       __do_sys_mkdirat fs/namei.c:5464 [inline]
       __se_sys_mkdirat+0x35/0x150 fs/namei.c:5461
       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

-> #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:5528
       filename_rmdir+0x292/0x520 fs/namei.c:5572
       __do_sys_rmdir fs/namei.c:5595 [inline]
       __se_sys_rmdir+0x2e/0x140 fs/namei.c:5592
       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#2 --> &journal->j_trans_barrier

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(&journal->j_trans_barrier);
                               lock(sb_internal#2);
                               lock(&journal->j_trans_barrier);
  lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]);

 *** DEADLOCK ***

locks held by syz-executor124/5594: 8, last CPU#0:
 #0: ffff888038bf2510 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:494
 #1: ffff888032963dc0 (&type->i_mutex_dir_key#6/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1069 [inline]
 #1: ffff888032963dc0 (&type->i_mutex_dir_key#6/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2918 [inline]
 #1: ffff888032963dc0 (&type->i_mutex_dir_key#6/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2942 [inline]
 #1: ffff888032963dc0 (&type->i_mutex_dir_key#6/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5565
 #2: ffff88802c224e30 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875
 #3: ffff88804497ce80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #3: ffff88804497ce80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:888 [inline]
 #3: ffff88804497ce80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline]
 #3: ffff88804497ce80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe39/0x4360 fs/ocfs2/inode.c:1333
 #4: ffff888032960b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #4: ffff888032960b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode fs/ocfs2/inode.c:767 [inline]
 #4: ffff888032960b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline]
 #4: ffff888032960b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline]
 #4: ffff888032960b80 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x1489/0x4360 fs/ocfs2/inode.c:1333
 #5: ffff888038bf2800 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_remove_inode fs/ocfs2/inode.c:776 [inline]
 #5: ffff888038bf2800 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:930 [inline]
 #5: ffff888038bf2800 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1191 [inline]
 #5: ffff888038bf2800 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_evict_inode+0x156b/0x4360 fs/ocfs2/inode.c:1333
 #6: ffff88801de80118 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x3af/0x700 fs/ocfs2/journal.c:369
 #7: ffff888011c70bb0 (jbd2_handle#2){.+.+}-{0:0}, at: start_this_handle+0x1fbf/0x2200 fs/jbd2/transaction.c:444

stack backtrace:
CPU: 0 UID: 0 PID: 5594 Comm: syz-executor124 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:5528
 filename_rmdir+0x292/0x520 fs/namei.c:5572
 __do_sys_rmdir fs/namei.c:5595 [inline]
 __se_sys_rmdir+0x2e/0x140 fs/namei.c:5592
 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: 0033:0x7fb4bb5102a7
Code: c7 04 24 10 00 00 00 48 63 4c 24 30 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 eb a2 e8 91 13 00 00 90 b8 54 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 d8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffe796ebc78 EFLAGS: 00000207 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb4bb5102a7
RDX: 0000000000010831 RSI: 0000555587aaa7d0 RDI: 00007ffe796ece20
RBP: 0000000000000065 R08: 00000000000087f0 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000207 R12: 00007ffe796ece20
R13: 0000555587aaa7e0 R14: 0000000000000001 R15: 431bde82d7b634db
 </TASK>
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)
ocfs2: Unmounting device (7,0) on (node local)