ntfs3: loop0: Mark volume as dirty due to NTFS errors
ntfs3: loop0: Failed to initialize $Extend/$Reparse.
======================================================
WARNING: possible circular locking dependency detected
6.6.95-syzkaller #0 Not tainted
------------------------------------------------------
syz.0.54/6225 is trying to acquire lock:
ffff88805fcba690 (&ni->file.run_lock#2){++++}-{3:3}, at: run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1117

but task is already holding lock:
ffff88802c0e0270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x702/0xba0 fs/ntfs3/run.c:1098

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/0x1f0 kernel/locking/rwsem.c:1689
       ntfs_look_for_free_space+0xd4/0x600 fs/ntfs3/fsntfs.c:362
       attr_allocate_clusters+0x1c2/0x6d0 fs/ntfs3/attrib.c:159
       attr_set_size+0x14a0/0x2c60 fs/ntfs3/attrib.c:575
       ntfs_set_size+0x164/0x200 fs/ntfs3/inode.c:849
       ntfs_extend+0x157/0x4d0 fs/ntfs3/file.c:332
       ntfs3_setattr+0x2ad/0xb60 fs/ntfs3/file.c:705
       notify_change+0xb0d/0xe10 fs/attr.c:499
       do_truncate+0x19b/0x220 fs/open.c:66
       vfs_truncate+0x266/0x300 fs/open.c:112
       do_sys_truncate+0xe0/0x1a0 fs/open.c:135
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
       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+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137
       lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
       run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1117
       ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
       ntfs_iget5+0x22e3/0x3750 fs/ntfs3/inode.c:533
       dir_search_u+0x1e0/0x2b0 fs/ntfs3/dir.c:264
       ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85
       lookup_one_qstr_excl+0x112/0x250 fs/namei.c:1609
       filename_create+0x222/0x460 fs/namei.c:3883
       do_mkdirat+0xa1/0x440 fs/namei.c:4128
       __do_sys_mkdirat fs/namei.c:4151 [inline]
       __se_sys_mkdirat fs/namei.c:4149 [inline]
       __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
       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.0.54/6225:
 #0: ffff88802c0e2418 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:403
 #1: ffff88805ffd3750 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
 #1: ffff88805ffd3750 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0x1f6/0x460 fs/namei.c:3882
 #2: ffff88805ffd34a0 (&ni->ni_lock#2/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1125 [inline]
 #2: ffff88805ffd34a0 (&ni->ni_lock#2/6){+.+.}-{3:3}, at: ntfs_lookup+0xee/0x1f0 fs/ntfs3/namei.c:84
 #3: ffff88802c0e0270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x702/0xba0 fs/ntfs3/run.c:1098

stack backtrace:
CPU: 1 PID: 6225 Comm: syz.0.54 Not tainted 6.6.95-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
 check_noncircular+0x2bd/0x3c0 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+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137
 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
 down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
 run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1117
 ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
 ntfs_iget5+0x22e3/0x3750 fs/ntfs3/inode.c:533
 dir_search_u+0x1e0/0x2b0 fs/ntfs3/dir.c:264
 ntfs_lookup+0xfb/0x1f0 fs/ntfs3/namei.c:85
 lookup_one_qstr_excl+0x112/0x250 fs/namei.c:1609
 filename_create+0x222/0x460 fs/namei.c:3883
 do_mkdirat+0xa1/0x440 fs/namei.c:4128
 __do_sys_mkdirat fs/namei.c:4151 [inline]
 __se_sys_mkdirat fs/namei.c:4149 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f402898d197
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f4029721e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f4029721ef0 RCX: 00007f402898d197
RDX: 00000000000001ff RSI: 0000200000000200 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000200
R13: 00007f4029721eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>