======================================================
WARNING: possible circular locking dependency detected
6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 Not tainted
------------------------------------------------------
syz.3.295/7854 is trying to acquire lock:
ffff0000f136ed80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
ffff0000f136ed80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline]
ffff0000f136ed80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: __ocfs2_move_extents_range+0x13ec/0x2abc fs/ocfs2/move_extents.c:860

but task is already holding lock:
ffff0000f12cdf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
ffff0000f12cdf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:632 [inline]
ffff0000f12cdf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: __ocfs2_move_extents_range+0xe58/0x2abc fs/ocfs2/move_extents.c:860

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:867 [inline]
       __ocfs2_flush_truncate_log+0x2e8/0xf6c fs/ocfs2/alloc.c:6054
       ocfs2_flush_truncate_log+0x4c/0x6c fs/ocfs2/alloc.c:6084
       ocfs2_sync_fs+0xf8/0x2a4 fs/ocfs2/super.c:406
       sync_filesystem+0x1a0/0x218 fs/sync.c:66
       generic_shutdown_super+0x70/0x2b8 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+0x31c/0x3ac fs/namespace.c:1435
       __cleanup_mnt+0x20/0x30 fs/namespace.c:1442
       task_work_run+0x1dc/0x260 kernel/task_work.c:227
       resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
       do_notify_resume+0x16c/0x1ec 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+0xb0/0x150 arch/arm64/kernel/entry-common.c:745
       el0t_64_sync_handler+0x78/0x108 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:3166 [inline]
       check_prevs_add kernel/locking/lockdep.c:3285 [inline]
       validate_chain kernel/locking/lockdep.c:3909 [inline]
       __lock_acquire+0x1728/0x3058 kernel/locking/lockdep.c:5235
       lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:867 [inline]
       ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline]
       __ocfs2_move_extents_range+0x13ec/0x2abc fs/ocfs2/move_extents.c:860
       ocfs2_move_extents+0x314/0x7f0 fs/ocfs2/move_extents.c:927
       ocfs2_ioctl_move_extents+0x424/0x5f0 fs/ocfs2/move_extents.c:1053
       ocfs2_ioctl+0x1c4/0x738 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/0x1c4 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+0x58/0x150 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x78/0x108 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 ***

5 locks held by syz.3.295/7854:
 #0: ffff0000c9de2420 (sb_writers#21){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:600
 #1: ffff0000f12c89c0 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #1: ffff0000f12c89c0 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: ocfs2_move_extents+0x16c/0x7f0 fs/ocfs2/move_extents.c:905
 #2: ffff0000f12c8660 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_move_extents+0x308/0x7f0 fs/ocfs2/move_extents.c:925
 #3: ffff0000f12cd100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #3: ffff0000f12cd100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b60 fs/ocfs2/suballoc.c:786
 #4: ffff0000f12cdf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #4: ffff0000f12cdf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_move_extent fs/ocfs2/move_extents.c:632 [inline]
 #4: ffff0000f12cdf40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: __ocfs2_move_extents_range+0xe58/0x2abc fs/ocfs2/move_extents.c:860

stack backtrace:
CPU: 0 UID: 0 PID: 7854 Comm: syz.3.295 Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT 
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+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2079
 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2211
 check_prev_add kernel/locking/lockdep.c:3166 [inline]
 check_prevs_add kernel/locking/lockdep.c:3285 [inline]
 validate_chain kernel/locking/lockdep.c:3909 [inline]
 __lock_acquire+0x1728/0x3058 kernel/locking/lockdep.c:5235
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5866
 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
 inode_lock include/linux/fs.h:867 [inline]
 ocfs2_move_extent fs/ocfs2/move_extents.c:640 [inline]
 __ocfs2_move_extents_range+0x13ec/0x2abc fs/ocfs2/move_extents.c:860
 ocfs2_move_extents+0x314/0x7f0 fs/ocfs2/move_extents.c:927
 ocfs2_ioctl_move_extents+0x424/0x5f0 fs/ocfs2/move_extents.c:1053
 ocfs2_ioctl+0x1c4/0x738 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/0x1c4 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+0x58/0x150 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600