ntfs3(loop3): failed to convert "0080" to cp852
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.3.1311/11498 is trying to acquire lock:
ffff88801144d910 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x7fa/0xb90

but task is already holding lock:
ffff8881179fa270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x732/0xb90

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&wnd->rw_lock){++++}-{4:4}:
       lock_acquire+0x11f/0x350
       down_write_nested+0x9d/0x210
       mark_as_free_ex+0x3e/0x390
       run_deallocate_ex+0x19a/0x310
       attr_set_size+0xee5/0x2cf0
       ntfs_setattr+0x611/0xc00
       notify_change+0xc1a/0xf40
       do_truncate+0x1c2/0x250
       path_openat+0x30c2/0x3890
       do_filp_open+0x22d/0x490
       do_sys_openat2+0x12f/0x1d0
       __x64_sys_creat+0x8f/0xc0
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ni->file.run_lock#2){++++}-{4:4}:
       validate_chain+0xb9a/0x2130
       __lock_acquire+0xab8/0xd20
       lock_acquire+0x11f/0x350
       down_read+0x46/0x2e0
       run_unpack_ex+0x7fa/0xb90
       ntfs_iget5+0x23b6/0x3870
       ntfs_read_hdr+0x7cf/0xc30
       ntfs_readdir+0xa83/0xe20
       iterate_dir+0x399/0x570
       __se_sys_getdents64+0xf1/0x280
       do_syscall_64+0xf0/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&wnd->rw_lock);
                               lock(&ni->file.run_lock#2);
                               lock(&wnd->rw_lock);
  rlock(&ni->file.run_lock#2);

 *** DEADLOCK ***

3 locks held by syz.3.1311/11498:
 #0: ffff88816a2858f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff8881aa993dd8 (&type->i_mutex_dir_key#11){++++}-{4:4}, at: iterate_dir+0x292/0x570
 #2: ffff8881179fa270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x732/0xb90

stack backtrace:
CPU: 0 UID: 0 PID: 11498 Comm: syz.3.1311 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x1a9/0x280
 print_circular_bug+0x2ed/0x300
 check_noncircular+0x134/0x160
 validate_chain+0xb9a/0x2130
 __lock_acquire+0xab8/0xd20
 lock_acquire+0x11f/0x350
 down_read+0x46/0x2e0
 run_unpack_ex+0x7fa/0xb90
 ntfs_iget5+0x23b6/0x3870
 ntfs_read_hdr+0x7cf/0xc30
 ntfs_readdir+0xa83/0xe20
 iterate_dir+0x399/0x570
 __se_sys_getdents64+0xf1/0x280
 do_syscall_64+0xf0/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f626499acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f6265913028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f6264c15fa0 RCX: 00007f626499acb9
RDX: 000000000000100c RSI: 0000200000002fc0 RDI: 0000000000000004
RBP: 00007f6264a08bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6264c16038 R14: 00007f6264c15fa0 R15: 00007ffeecc684e8
 </TASK>
ntfs3(loop3): failed to convert name for inode 1e.
ntfs3(loop3): ino=1f, mi_enum_attr
