loop0: detected capacity change from 0 to 4096
ntfs3: loop0: Different NTFS sector size (2048) and media sector size (512).
Zero length message leads to an empty skb
loop0: detected capacity change from 4096 to 4095
ntfs3: loop0: ino=5, "/" directory corrupted
============================================
WARNING: possible recursive locking detected
6.12.0-rc2-syzkaller-00006-g87d6aab2389e #0 Not tainted
--------------------------------------------
syz.0.0/5105 is trying to acquire lock:
ffff88803f308100 (&ni->ni_lock#2){+.+.}-{3:3}, at: ntfs_set_state+0x1ff/0x6c0 fs/ntfs3/fsntfs.c:947

but task is already holding lock:
ffff88803f30ef28 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1129 [inline]
ffff88803f30ef28 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_write_inode+0x1bc/0x1010 fs/ntfs3/frecord.c:3333

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

       CPU0
       ----
  lock(&ni->ni_lock#2);
  lock(&ni->ni_lock#2);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

5 locks held by syz.0.0/5105:
 #0: ffff888000634b78 (&f->f_pos_lock){+.+.}-{3:3}, at: fdget_pos+0x24e/0x320 fs/file.c:1160
 #1: ffff888035cd4420 (sb_writers#11){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2931 [inline]
 #1: ffff888035cd4420 (sb_writers#11){.+.+}-{0:0}, at: vfs_write+0x224/0xc90 fs/read_write.c:679
 #2: ffff88803f30f1c0 (&sb->s_type->i_mutex_key#19){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
 #2: ffff88803f30f1c0 (&sb->s_type->i_mutex_key#19){+.+.}-{3:3}, at: __generic_file_fsync+0x97/0x1a0 fs/libfs.c:1532
 #3: ffff88803f30ef28 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1129 [inline]
 #3: ffff88803f30ef28 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_write_inode+0x1bc/0x1010 fs/ntfs3/frecord.c:3333
 #4: ffff88803f30e7d0 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_trylock fs/ntfs3/ntfs_fs.h:1129 [inline]
 #4: ffff88803f30e7d0 (&ni->ni_lock#2){+.+.}-{3:3}, at: ni_update_parent+0x9d2/0xdd0 fs/ntfs3/frecord.c:3298

stack backtrace:
CPU: 0 UID: 0 PID: 5105 Comm: syz.0.0 Not tainted 6.12.0-rc2-syzkaller-00006-g87d6aab2389e #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3037
 check_deadlock kernel/locking/lockdep.c:3089 [inline]
 validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3891
 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 __mutex_lock_common kernel/locking/mutex.c:608 [inline]
 __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752
 ntfs_set_state+0x1ff/0x6c0 fs/ntfs3/fsntfs.c:947
 indx_read+0x5a7/0xc50
 indx_find+0x47a/0xbf0 fs/ntfs3/index.c:1181
 indx_update_dup+0x485/0x860 fs/ntfs3/index.c:2666
 ni_update_parent+0xa18/0xdd0 fs/ntfs3/frecord.c:3301
 ni_write_inode+0xd9a/0x1010 fs/ntfs3/frecord.c:3392
 write_inode fs/fs-writeback.c:1503 [inline]
 __writeback_single_inode+0x711/0x10d0 fs/fs-writeback.c:1723
 writeback_single_inode+0x1f3/0x660 fs/fs-writeback.c:1779
 sync_inode_metadata+0xc4/0x120 fs/fs-writeback.c:2849
 __generic_file_fsync+0x134/0x1a0 fs/libfs.c:1539
 generic_file_fsync+0x70/0xf0 fs/libfs.c:1569
 generic_write_sync include/linux/fs.h:2871 [inline]
 ntfs_file_write_iter+0x627/0x740 fs/ntfs3/file.c:1198
 new_sync_write fs/read_write.c:590 [inline]
 vfs_write+0xa6d/0xc90 fs/read_write.c:683
 ksys_write+0x183/0x2b0 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd5bc77dff9
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:00007fd5bd5f0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fd5bc935f80 RCX: 00007fd5bc77dff9
RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000005
RBP: 00007fd5bc7f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd5bc935f80 R15: 00007ffcd0e816d8
 </TASK>
ntfs3: loop0: Mark volume as dirty due to NTFS errors