ntfs3(loop0): ino=b, mi_enum_attr
ntfs3(loop0): Mark volume as dirty due to NTFS errors
ntfs3(loop0): Failed to load $Extend (-22).
ntfs3(loop0): Failed to initialize $Extend.
============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.0.3784/18252 is trying to acquire lock:
ffff8880488ea568 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline]
ffff8880488ea568 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: mi_read+0x466/0x660 fs/ntfs3/record.c:148

but task is already holding lock:
ffff8880522449d0 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline]
ffff8880522449d0 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_link+0x107/0x290 fs/ntfs3/namei.c:141

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&ni->ni_lock#3/5);
  lock(&ni->ni_lock#3/5);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

6 locks held by syz.0.3784/18252:
 #0: ffff8880787b4420 (sb_writers#13){.+.+}-{0:0}, at: filename_create+0x10e/0x4a0 fs/namei.c:4219
 #1: ffff888052242f48 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1024 [inline]
 #1: ffff888052242f48 (&type->i_mutex_dir_key#9/1){+.+.}-{4:4}, at: filename_create+0x1bb/0x4a0 fs/namei.c:4226
 #2: ffff888052244c68 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:979 [inline]
 #2: ffff888052244c68 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: vfs_link+0x649/0xe50 fs/namei.c:4932
 #3: ffff888052242cb0 (&ni->ni_lock/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1118 [inline]
 #3: ffff888052242cb0 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_link+0xec/0x290 fs/ntfs3/namei.c:139
 #4: ffff8880522449d0 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline]
 #4: ffff8880522449d0 (&ni->ni_lock#3/5){+.+.}-{4:4}, at: ntfs_link+0x107/0x290 fs/ntfs3/namei.c:141
 #5: ffff8880787b2128 (&wnd->rw_lock/1){+.+.}-{4:4}, at: ntfs_look_free_mft+0x349/0xe10 fs/ntfs3/fsntfs.c:571

stack backtrace:
CPU: 0 UID: 0 PID: 18252 Comm: syz.0.3784 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_deadlock_bug+0x1e9/0x240 kernel/locking/lockdep.c:3041
 check_deadlock kernel/locking/lockdep.c:3093 [inline]
 validate_chain kernel/locking/lockdep.c:3895 [inline]
 __lock_acquire+0x1133/0x1ce0 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
 __mutex_lock_common kernel/locking/mutex.c:598 [inline]
 __mutex_lock+0x193/0x1060 kernel/locking/mutex.c:760
 ni_lock fs/ntfs3/ntfs_fs.h:1113 [inline]
 mi_read+0x466/0x660 fs/ntfs3/record.c:148
 mi_format_new+0x3a3/0x570 fs/ntfs3/record.c:434
 ni_add_subrecord+0xd1/0x4f0 fs/ntfs3/frecord.c:321
 ntfs_look_free_mft+0x20c/0xe10 fs/ntfs3/fsntfs.c:715
 ni_create_attr_list+0x8bc/0x14a0 fs/ntfs3/frecord.c:826
 ni_ins_attr_ext+0x237/0xaf0 fs/ntfs3/frecord.c:924
 ni_insert_attr+0x30d/0x870 fs/ntfs3/frecord.c:1091
 ni_insert_resident+0xd6/0x3a0 fs/ntfs3/frecord.c:1475
 ni_add_name+0x48f/0x820 fs/ntfs3/frecord.c:2987
 ntfs_link_inode+0x172/0x1d0 fs/ntfs3/inode.c:1733
 ntfs_link+0x127/0x290 fs/ntfs3/namei.c:146
 vfs_link+0x839/0xe50 fs/namei.c:4941
 do_linkat+0x46c/0x5a0 fs/namei.c:5011
 __do_sys_link fs/namei.c:5045 [inline]
 __se_sys_link fs/namei.c:5043 [inline]
 __x64_sys_link+0x7d/0xa0 fs/namei.c:5043
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3c1378eec9
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:00007f3c146eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f3c139e5fa0 RCX: 00007f3c1378eec9
RDX: 0000000000000000 RSI: 0000200000001080 RDI: 0000200000000200
RBP: 00007f3c13811f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3c139e6038 R14: 00007f3c139e5fa0 R15: 00007ffec70f8ff8
 </TASK>