ntfs3(loop8): Failed to initialize $Extend/$Reparse.
ntfs3(loop8): ino=1b, mi_enum_attr
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.8.809/14581 is trying to acquire lock:
ffff8881b5b6d910 (&ni->file.run_lock
#2){++++}-{4:4}, at: run_unpack_ex+0x7e5/0xba0

but task is already holding lock:
ffff8881bbc2c278 (&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}:
       down_write_nested+0x9d/0x200
       ntfs_look_for_free_space+0xd3/0x600
       attr_allocate_clusters+0x1c1/0x6d0
       attr_set_size+0x14a4/0x2c70
       ntfs_set_size+0x164/0x200
       ntfs_extend+0x1d9/0x970
       ntfs_file_write_iter+0x421/0x870
       iter_file_splice_write+0x972/0x10b0
       direct_splice_actor+0x101/0x160
       splice_direct_to_actor+0x5a8/0xcc0
       do_splice_direct+0x181/0x270
       do_sendfile+0x4da/0x7e0
       __se_sys_sendfile64+0x13e/0x190
       do_syscall_64+0xec/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ni->file.run_lock#2){++++}-{4:4}:
       __lock_acquire+0x15a6/0x2cf0
       lock_acquire+0x107/0x340
       down_read+0x47/0x2e0
       run_unpack_ex+0x7e5/0xba0
       ntfs_iget5+0x238b/0x3860
       dir_search_u+0x1df/0x2c0
       ntfs_lookup+0xfb/0x1f0
       __lookup_slow+0x297/0x3d0
       lookup_slow+0x53/0x70
       path_lookupat+0x3f5/0x8c0
       filename_lookup+0x212/0x570
       user_path_at+0x3a/0x60
       __se_sys_mount+0x2d4/0x410
       do_syscall_64+0xec/0xf80
       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.8.809/14581:
 #0: ffff8881aec79228 (&type->i_mutex_dir_key#11){++++}-{4:4}, at: lookup_slow+0x46/0x70
 #1: ffff8881aec78f90 (&ni->ni_lock#2/6){+.+.}-{4:4}, at: ntfs_lookup+0xee/0x1f0
 #2: ffff8881bbc2c278 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x701/0xba0

stack backtrace:
CPU: 1 UID: 0 PID: 14581 Comm: syz.8.809 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+0xe8/0x150
 print_circular_bug+0x2e2/0x300
 check_noncircular+0x12e/0x150
 __lock_acquire+0x15a6/0x2cf0
 lock_acquire+0x107/0x340
 down_read+0x47/0x2e0
 run_unpack_ex+0x7e5/0xba0
 ntfs_iget5+0x238b/0x3860
 dir_search_u+0x1df/0x2c0
 ntfs_lookup+0xfb/0x1f0
 __lookup_slow+0x297/0x3d0
 lookup_slow+0x53/0x70
 path_lookupat+0x3f5/0x8c0
 filename_lookup+0x212/0x570
 user_path_at+0x3a/0x60
 __se_sys_mount+0x2d4/0x410
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb429d8f7c9
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:00007fb427ff6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb429fe5fa0 RCX: 00007fb429d8f7c9
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000000
RBP: 00007fb429df297f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000001200800 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb429fe6038 R14: 00007fb429fe5fa0 R15: 00007ffca38b6a58
 </TASK>
overlayfs: upper fs does not support tmpfile.
overlayfs: upper fs does not support RENAME_WHITEOUT.
overlayfs: failed to get uuid (/file0, err=-22); falling back to uuid=null.
overlayfs: failed to get origin (-22)
ntfs3(loop8): ino=1b, "file0" mi_enum_attr
ntfs3(loop8): ino=1b, "file0" mi_enum_attr
ntfs3(loop8): ino=1b, "file0" mi_enum_attr
overlayfs: failed to verify upper root origin
