ntfs3(loop2): failed to convert "0080" to cp852
======================================================
WARNING: possible circular locking dependency detected
6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 Not tainted
------------------------------------------------------
syz-executor/6566 is trying to acquire lock:
ffff0000f81497b8 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1119

but task is already holding lock:
ffff0000d40e8270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x60c/0x998 fs/ntfs3/run.c:1100

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&wnd->rw_lock){++++}-{4:4}:
       down_write_nested+0x58/0xcc kernel/locking/rwsem.c:1706
       mark_as_free_ex+0x40/0x324 fs/ntfs3/fsntfs.c:2464
       run_deallocate_ex+0x150/0x2bc fs/ntfs3/attrib.c:122
       attr_collapse_range+0x944/0x120c fs/ntfs3/attrib.c:1972
       ntfs_fallocate+0x634/0xdd4 fs/ntfs3/file.c:617
       vfs_fallocate+0x52c/0x668 fs/open.c:342
       ksys_fallocate fs/open.c:366 [inline]
       __do_sys_fallocate fs/open.c:371 [inline]
       __se_sys_fallocate fs/open.c:369 [inline]
       __arm64_sys_fallocate+0xbc/0x10c fs/open.c:369
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #0 (&ni->file.run_lock#2){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237
       lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
       down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537
       run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1119
       ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
       ntfs_iget5+0x19f4/0x2a44 fs/ntfs3/inode.c:540
       ntfs_dir_emit fs/ntfs3/dir.c:337 [inline]
       ntfs_read_hdr+0x5f4/0x988 fs/ntfs3/dir.c:385
       ntfs_readdir+0x664/0xb88 fs/ntfs3/dir.c:496
       iterate_dir+0x2dc/0x478 fs/readdir.c:108
       __do_sys_getdents64 fs/readdir.c:410 [inline]
       __se_sys_getdents64 fs/readdir.c:396 [inline]
       __arm64_sys_getdents64+0x110/0x2fc fs/readdir.c:396
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

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/6566:
 #0: ffff0000db5e70b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x1fc/0x2a0 fs/file.c:1232
 #1: ffff0000f8287918 (&type->i_mutex_dir_key#15){++++}-{4:4}, at: iterate_dir+0x224/0x478 fs/readdir.c:101
 #2: ffff0000d40e8270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x60c/0x998 fs/ntfs3/run.c:1100

stack backtrace:
CPU: 0 UID: 0 PID: 6566 Comm: syz-executor Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043
 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537
 run_unpack_ex+0x6cc/0x998 fs/ntfs3/run.c:1119
 ntfs_read_mft fs/ntfs3/inode.c:401 [inline]
 ntfs_iget5+0x19f4/0x2a44 fs/ntfs3/inode.c:540
 ntfs_dir_emit fs/ntfs3/dir.c:337 [inline]
 ntfs_read_hdr+0x5f4/0x988 fs/ntfs3/dir.c:385
 ntfs_readdir+0x664/0xb88 fs/ntfs3/dir.c:496
 iterate_dir+0x2dc/0x478 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:410 [inline]
 __se_sys_getdents64 fs/readdir.c:396 [inline]
 __arm64_sys_getdents64+0x110/0x2fc fs/readdir.c:396
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
ntfs3(loop2): failed to convert name for inode 1e.
ntfs3(loop2): ino=1f, mi_enum_attr