ntfs3(loop6): ino=0, mi_enum_attr
ntfs3(loop6): Mark volume as dirty due to NTFS errors
ntfs3(loop6): failed to convert "0080" to cp852
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.6.2043/15582 is trying to acquire lock:
ffff888123a19060 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x7e5/0xba0

but task is already holding lock:
ffff888026a8c270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x701/0xba0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&wnd->rw_lock){++++}-{4:4}:
       lock_acquire+0x120/0x360
       down_write_nested+0x9d/0x200
       ntfs_look_for_free_space+0xd3/0x600
       attr_allocate_clusters+0x1c1/0x6d0
       attr_set_size+0x14a4/0x2c70
       ntfs_extend_mft+0x162/0x450
       ntfs_look_free_mft+0x5f8/0xd50
       ni_create_attr_list+0x8ff/0x13d0
       ni_ins_attr_ext+0x43e/0xb50
       ni_insert_attr+0x2fb/0x870
       ni_insert_resident+0x82/0x380
       ntfs_set_ea+0xaee/0x1310
       ntfs_setxattr+0x14c/0x810
       __vfs_setxattr+0x43c/0x480
       __vfs_setxattr_noperm+0x12d/0x660
       vfs_setxattr+0x16b/0x2f0
       filename_setxattr+0x274/0x600
       path_setxattrat+0x364/0x3a0
       __x64_sys_setxattr+0xbc/0xe0
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ni->file.run_lock#2){++++}-{4:4}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       run_unpack_ex+0x7e5/0xba0
       ntfs_iget5+0x232b/0x37c0
       ntfs_read_hdr+0x7cf/0xc30
       ntfs_readdir+0xa5c/0xdd0
       iterate_dir+0x399/0x570
       __se_sys_getdents+0xe4/0x250
       do_syscall_64+0xfa/0x3b0
       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.6.2043/15582:
 #0: ffff88810ca72cf8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320
 #1: ffff888123a1f918 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: iterate_dir+0x292/0x570
 #2: ffff888026a8c270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x701/0xba0

stack backtrace:
CPU: 0 UID: 0 PID: 15582 Comm: syz.6.2043 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+0x189/0x250
 print_circular_bug+0x2ee/0x310
 check_noncircular+0x134/0x160
 validate_chain+0xb9b/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 down_read+0x46/0x2e0
 run_unpack_ex+0x7e5/0xba0
 ntfs_iget5+0x232b/0x37c0
 ntfs_read_hdr+0x7cf/0xc30
 ntfs_readdir+0xa5c/0xdd0
 iterate_dir+0x399/0x570
 __se_sys_getdents+0xe4/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa42fb8eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa430a4f038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007fa42fdd5fa0 RCX: 00007fa42fb8eba9
RDX: 00000000000000b8 RSI: 0000200000001fc0 RDI: 0000000000000004
RBP: 00007fa42fc11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa42fdd6038 R14: 00007fa42fdd5fa0 R15: 00007fff60c4cb98
 </TASK>
ntfs3(loop6): failed to convert name for inode 1e.
ntfs3(loop6): ino=1f, mi_enum_attr
