ntfs3: loop3: failed to convert "0080" to macinuit
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz-executor/8241 is trying to acquire lock:
ffff888022c13550 (&ni->file.run_lock#2){++++}-{3:3}, at: run_unpack_ex+0x7fb/0xb80 fs/ntfs3/run.c:1126

but task is already holding lock:
ffff888025750270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x733/0xb80 fs/ntfs3/run.c:1107

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
       mark_as_free_ex+0x3e/0x380 fs/ntfs3/fsntfs.c:2497
       run_deallocate_ex+0x19b/0x310 fs/ntfs3/attrib.c:122
       attr_collapse_range+0xcac/0x17f0 fs/ntfs3/attrib.c:1995
       ntfs_fallocate+0x7bb/0x1040 fs/ntfs3/file.c:558
       vfs_fallocate+0x58e/0x700 fs/open.c:324
       ksys_fallocate fs/open.c:347 [inline]
       __do_sys_fallocate fs/open.c:355 [inline]
       __se_sys_fallocate fs/open.c:353 [inline]
       __x64_sys_fallocate+0xc1/0x110 fs/open.c:353
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xa0 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+0x2df1/0x7d40 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+0x7fb/0xb80 fs/ntfs3/run.c:1126
       ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
       ntfs_iget5+0x2475/0x38a0 fs/ntfs3/inode.c:535
       ntfs_dir_emit fs/ntfs3/dir.c:338 [inline]
       ntfs_read_hdr+0x7d4/0xc30 fs/ntfs3/dir.c:386
       ntfs_readdir+0xacb/0xeb0 fs/ntfs3/dir.c:497
       iterate_dir+0x1c2/0x580 fs/readdir.c:106
       __do_sys_getdents64 fs/readdir.c:405 [inline]
       __se_sys_getdents64+0xf6/0x270 fs/readdir.c:390
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xa0 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 ***

3 locks held by syz-executor/8241:
 #0: ffff888074d274c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2a3/0x330 fs/file.c:1040
 #1: ffff888022c103b0 (&type->i_mutex_dir_key#12){++++}-{3:3}, at: iterate_dir+0xcb/0x580 fs/readdir.c:99
 #2: ffff888025750270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x733/0xb80 fs/ntfs3/run.c:1107

stack backtrace:
CPU: 1 PID: 8241 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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+0x2df1/0x7d40 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+0x7fb/0xb80 fs/ntfs3/run.c:1126
 ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
 ntfs_iget5+0x2475/0x38a0 fs/ntfs3/inode.c:535
 ntfs_dir_emit fs/ntfs3/dir.c:338 [inline]
 ntfs_read_hdr+0x7d4/0xc30 fs/ntfs3/dir.c:386
 ntfs_readdir+0xacb/0xeb0 fs/ntfs3/dir.c:497
 iterate_dir+0x1c2/0x580 fs/readdir.c:106
 __do_sys_getdents64 fs/readdir.c:405 [inline]
 __se_sys_getdents64+0xf6/0x270 fs/readdir.c:390
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbbd39c5773
Code: c7 c0 e8 ff ff ff 64 c7 00 16 00 00 00 31 c0 eb 9e e8 81 9b fd ff 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 e8 ff ff ff f7 d8
RSP: 002b:00007fffdac2e858 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0000555580b18a40 RCX: 00007fbbd39c5773
RDX: 0000000000008000 RSI: 0000555580b18a70 RDI: 0000000000000005
RBP: 0000555580b18a70 R08: 00000000000285d1 R09: 0000000000000001
R10: 00007fbbd3bede20 R11: 0000000000000293 R12: 0000555580b18a44
R13: ffffffffffffffe8 R14: 0000000000000010 R15: 00007fffdac30b00
 </TASK>