======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc6-syzkaller-g059f6cbcfa70 #0 Not tainted
------------------------------------------------------
syz-executor/6458 is trying to acquire lock:
ffff0000dcad09c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
ffff0000dcad09c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: __ocfs2_flush_truncate_log+0x308/0x1140 fs/ocfs2/alloc.c:6046

but task is already holding lock:
ffff0000f4d7ed80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
ffff0000f4d7ed80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_flush_truncate_log+0x48/0x70 fs/ocfs2/alloc.c:6075

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:877 [inline]
       ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline]
       __ocfs2_move_extents_range+0x1824/0x35bc fs/ocfs2/move_extents.c:860
       ocfs2_move_extents+0x388/0x924 fs/ocfs2/move_extents.c:927
       ocfs2_ioctl_move_extents+0x690/0x948 fs/ocfs2/move_extents.c:1053
       ocfs2_ioctl+0x280/0xe14 fs/ocfs2/ioctl.c:946
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:906 [inline]
       __se_sys_ioctl fs/ioctl.c:892 [inline]
       __arm64_sys_ioctl+0x14c/0x1cc fs/ioctl.c:892
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3163 [inline]
       check_prevs_add kernel/locking/lockdep.c:3282 [inline]
       validate_chain kernel/locking/lockdep.c:3906 [inline]
       __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228
       lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:877 [inline]
       __ocfs2_flush_truncate_log+0x308/0x1140 fs/ocfs2/alloc.c:6046
       ocfs2_flush_truncate_log+0x50/0x70 fs/ocfs2/alloc.c:6076
       ocfs2_sync_fs+0x110/0x31c fs/ocfs2/super.c:406
       sync_filesystem+0x1a0/0x218 fs/sync.c:66
       generic_shutdown_super+0x70/0x2bc fs/super.c:621
       kill_block_super+0x44/0x90 fs/super.c:1710
       deactivate_locked_super+0xc4/0x12c fs/super.c:473
       deactivate_super+0xe0/0x100 fs/super.c:506
       cleanup_mnt+0x34c/0x3dc fs/namespace.c:1413
       __cleanup_mnt+0x20/0x30 fs/namespace.c:1420
       task_work_run+0x230/0x2e0 kernel/task_work.c:227
       resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
       do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
       exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
       exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
       el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3);

 *** DEADLOCK ***

2 locks held by syz-executor/6458:
 #0: ffff0000f0e3e0e0 (&type->s_umount_key#85){+.+.}-{4:4}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff0000f0e3e0e0 (&type->s_umount_key#85){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff0000f0e3e0e0 (&type->s_umount_key#85){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505
 #1: ffff0000f4d7ed80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
 #1: ffff0000f4d7ed80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_flush_truncate_log+0x48/0x70 fs/ocfs2/alloc.c:6075

stack backtrace:
CPU: 0 UID: 0 PID: 6458 Comm: syz-executor Not tainted 6.14.0-rc6-syzkaller-g059f6cbcfa70 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2076
 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2208
 check_prev_add kernel/locking/lockdep.c:3163 [inline]
 check_prevs_add kernel/locking/lockdep.c:3282 [inline]
 validate_chain kernel/locking/lockdep.c:3906 [inline]
 __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228
 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
 inode_lock include/linux/fs.h:877 [inline]
 __ocfs2_flush_truncate_log+0x308/0x1140 fs/ocfs2/alloc.c:6046
 ocfs2_flush_truncate_log+0x50/0x70 fs/ocfs2/alloc.c:6076
 ocfs2_sync_fs+0x110/0x31c fs/ocfs2/super.c:406
 sync_filesystem+0x1a0/0x218 fs/sync.c:66
 generic_shutdown_super+0x70/0x2bc fs/super.c:621
 kill_block_super+0x44/0x90 fs/super.c:1710
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1413
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1420
 task_work_run+0x230/0x2e0 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
ocfs2: Unmounting device (7,4) on (node local)