ntfs3: loop5: Failed to initialize $Extend/$Reparse.
ntfs3: loop5: Mark volume as dirty due to NTFS errors
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.5.12096/32714 is trying to acquire lock:
ffff88805ecd0910 (&ni->file.run_lock#2){++++}-{3:3}, at: run_unpack_ex+0x858/0xc40 fs/ntfs3/run.c:1138

but task is already holding lock:
ffff88805cc9a270 (&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
       mark_as_free_ex+0x41/0x3b0 fs/ntfs3/fsntfs.c:2497
       run_deallocate_ex+0x19b/0x310 fs/ntfs3/attrib.c:122
       attr_set_size+0xe6a/0x2ad0 fs/ntfs3/attrib.c:756
       ntfs_truncate fs/ntfs3/file.c:396 [inline]
       ntfs3_setattr+0x6b0/0xa80 fs/ntfs3/file.c:704
       notify_change+0xb05/0xde0 fs/attr.c:499
       do_truncate+0x1b0/0x240 fs/open.c:66
       vfs_truncate+0x266/0x300 fs/open.c:112
       do_sys_truncate+0xf6/0x1c0 fs/open.c:135
       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
       filename_create+0x246/0x450 fs/namei.c:3938
       do_mkdirat+0xa9/0x450 fs/namei.c:4183
       __do_sys_mkdirat fs/namei.c:4206 [inline]
       __se_sys_mkdirat fs/namei.c:4204 [inline]
       __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4204
       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.5.12096/32714:
 #0: ffff88805cc9c418 (sb_writers#27){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
 #1: ffff8880538183b0 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:839 [inline]
 #1: ffff8880538183b0 (&type->i_mutex_dir_key#17/1){+.+.}-{3:3}, at: filename_create+0x20f/0x450 fs/namei.c:3937
 #2: ffff888053818100 (&ni->ni_lock#2/6){+.+.}-{3:3}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1128 [inline]
 #2: ffff888053818100 (&ni->ni_lock#2/6){+.+.}-{3:3}, at: ntfs_lookup+0xf3/0x1d0 fs/ntfs3/namei.c:84
 #3: ffff88805cc9a270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x779/0xc40 fs/ntfs3/run.c:1119

stack backtrace:
CPU: 0 PID: 32714 Comm: syz.5.12096 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
 filename_create+0x246/0x450 fs/namei.c:3938
 do_mkdirat+0xa9/0x450 fs/namei.c:4183
 __do_sys_mkdirat fs/namei.c:4206 [inline]
 __se_sys_mkdirat fs/namei.c:4204 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4204
 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: 0033:0x7f30f4f9cf47
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007f30f5e2be58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f30f5e2bee0 RCX: 00007f30f4f9cf47
RDX: 00000000000001ff RSI: 0000200000000380 RDI: 00000000ffffff9c
RBP: 00002000000002c0 R08: 0000200000000380 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000380
R13: 00007f30f5e2bea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>