ntfs3: loop3: Mark volume as dirty due to NTFS errors
ntfs3: loop3: Inode r=b is not in use!
ntfs3: loop3: Failed to load $Extend (-116).
ntfs3: loop3: Failed to initialize $Extend.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.3.12555/2386 is trying to acquire lock:
ffff88805b5977b0 (&ni->file.run_lock#2){++++}-{3:3}, at: run_unpack_ex+0x858/0xc40 fs/ntfs3/run.c:1138

but task is already holding lock:
ffff888055612270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x779/0xc40 fs/ntfs3/run.c:1119

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&wnd->rw_lock){++++}-{3:3}:
       down_write_nested+0x9e/0x200 kernel/locking/rwsem.c:1689
       ntfs_look_for_free_space+0xdf/0x630 fs/ntfs3/fsntfs.c:362
       attr_allocate_clusters+0x1be/0x6b0 fs/ntfs3/attrib.c:159
       attr_set_size+0x1406/0x2ad0 fs/ntfs3/attrib.c:577
       ntfs_extend_mft+0x16a/0x470 fs/ntfs3/fsntfs.c:512
       ntfs_look_free_mft+0x667/0xd90 fs/ntfs3/fsntfs.c:709
       ntfs_create_inode+0x52b/0x3560 fs/ntfs3/inode.c:1353
       ntfs_mknod+0x40/0x60 fs/ntfs3/namei.c:128
       vfs_mknod+0x325/0x360 fs/namei.c:4046
       do_mknodat+0x386/0x500 fs/namei.c:-1
       __do_sys_mknod fs/namei.c:4129 [inline]
       __se_sys_mknod fs/namei.c:4127 [inline]
       __x64_sys_mknod+0x8e/0xa0 fs/namei.c:4127
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #0 (&ni->file.run_lock#2){++++}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain kernel/locking/lockdep.c:3869 [inline]
       __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137
       lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
       run_unpack_ex+0x858/0xc40 fs/ntfs3/run.c:1138
       ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
       ntfs_iget5+0x2080/0x37f0 fs/ntfs3/inode.c:535
       dir_search_u+0x1fe/0x2e0 fs/ntfs3/dir.c:264
       ntfs_lookup+0x100/0x1d0 fs/ntfs3/namei.c:85
       lookup_one_qstr_excl+0x112/0x250 fs/namei.c:1617
       do_unlinkat+0x19d/0x590 fs/namei.c:4432
       __do_sys_unlinkat fs/namei.c:4489 [inline]
       __se_sys_unlinkat fs/namei.c:4482 [inline]
       __x64_sys_unlinkat+0xd5/0xe0 fs/namei.c:4482
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

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 ***

4 locks held by syz.3.12555/2386:
 #0: ffff888055616418 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
 #1: ffff88805b592890 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
 #1: ffff88805b592890 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: do_unlinkat+0x18d/0x590 fs/namei.c:4431
 #2: ffff88805b5925e0 (&ni->ni_lock#2/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1128 [inline]
 #2: ffff88805b5925e0 (&ni->ni_lock#2/6){+.+.}-{3:3}, at: ntfs_lookup+0xf3/0x1d0 fs/ntfs3/namei.c:84
 #3: ffff888055612270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x779/0xc40 fs/ntfs3/run.c:1119

stack backtrace:
CPU: 1 PID: 2386 Comm: syz.3.12555 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 check_noncircular+0x2fc/0x400 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain kernel/locking/lockdep.c:3869 [inline]
 __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137
 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
 run_unpack_ex+0x858/0xc40 fs/ntfs3/run.c:1138
 ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
 ntfs_iget5+0x2080/0x37f0 fs/ntfs3/inode.c:535
 dir_search_u+0x1fe/0x2e0 fs/ntfs3/dir.c:264
 ntfs_lookup+0x100/0x1d0 fs/ntfs3/namei.c:85
 lookup_one_qstr_excl+0x112/0x250 fs/namei.c:1617
 do_unlinkat+0x19d/0x590 fs/namei.c:4432
 __do_sys_unlinkat fs/namei.c:4489 [inline]
 __se_sys_unlinkat fs/namei.c:4482 [inline]
 __x64_sys_unlinkat+0xd5/0xe0 fs/namei.c:4482
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5a31d9e0d9
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:00007f5a32b8c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007f5a32025fa0 RCX: 00007f5a31d9e0d9
RDX: 0000000000000000 RSI: 0000200000000180 RDI: ffffffffffffff9c
RBP: 00007f5a31e35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a32026038 R14: 00007f5a32025fa0 R15: 00007ffdc67f2d78
 </TASK>