loop5: detected capacity change from 0 to 4096
ntfs3: loop5: failed to convert "0080" to cp852
ntfs3: loop5: Mark volume as dirty due to NTFS errors
======================================================
WARNING: possible circular locking dependency detected
6.6.102-syzkaller #0 Not tainted
------------------------------------------------------
syz.5.2458/13216 is trying to acquire lock:
ffff888059cbc410 (&ni->file.run_lock#2){++++}-{3:3}, at: run_unpack_ex+0x7e6/0xba0 fs/ntfs3/run.c:1117

but task is already holding lock:
ffff888063dd0270 (&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_extend_mft+0x163/0x450 fs/ntfs3/fsntfs.c:512
       ntfs_look_free_mft+0x5f6/0xd40 fs/ntfs3/fsntfs.c:709
       ni_create_attr_list+0x904/0x1370 fs/ntfs3/frecord.c:878
       ni_ins_attr_ext+0x315/0x9c0 fs/ntfs3/frecord.c:976
       ni_insert_attr fs/ntfs3/frecord.c:1143 [inline]
       ni_insert_resident fs/ntfs3/frecord.c:1527 [inline]
       ni_add_name+0x6e0/0xc90 fs/ntfs3/frecord.c:3042
       ni_rename+0x4b/0x100 fs/ntfs3/frecord.c:3081
       ntfs_rename+0x6dc/0xb30 fs/ntfs3/namei.c:333
       vfs_rename+0xb96/0xec0 fs/namei.c:4872
       do_renameat2+0x8a1/0xc70 fs/namei.c:5025
       __do_sys_rename fs/namei.c:5071 [inline]
       __se_sys_rename fs/namei.c:5069 [inline]
       __x64_sys_rename+0x86/0x90 fs/namei.c:5069
       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
       ntfs_dir_emit fs/ntfs3/dir.c:335 [inline]
       ntfs_read_hdr+0x714/0xbc0 fs/ntfs3/dir.c:383
       ntfs_readdir+0xaf4/0xe60 fs/ntfs3/dir.c:494
       iterate_dir+0x1c2/0x580 fs/readdir.c:106
       __do_sys_getdents fs/readdir.c:322 [inline]
       __se_sys_getdents+0xe9/0x260 fs/readdir.c:307
       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 ***

3 locks held by syz.5.2458/13216:
 #0: ffff8880257c2fc8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2a3/0x330 fs/file.c:1042
 #1: ffff888059cb83b0 (&type->i_mutex_dir_key#11){++++}-{3:3}, at: iterate_dir+0xcb/0x580 fs/readdir.c:99
 #2: ffff888063dd0270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x702/0xba0 fs/ntfs3/run.c:1098

stack backtrace:
CPU: 0 PID: 13216 Comm: syz.5.2458 Not tainted 6.6.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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
 ntfs_dir_emit fs/ntfs3/dir.c:335 [inline]
 ntfs_read_hdr+0x714/0xbc0 fs/ntfs3/dir.c:383
 ntfs_readdir+0xaf4/0xe60 fs/ntfs3/dir.c:494
 iterate_dir+0x1c2/0x580 fs/readdir.c:106
 __do_sys_getdents fs/readdir.c:322 [inline]
 __se_sys_getdents+0xe9/0x260 fs/readdir.c:307
 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: 0033:0x7f1d7098ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1d71806038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007f1d70bb5fa0 RCX: 00007f1d7098ebe9
RDX: 00000000000000b8 RSI: 0000200000001fc0 RDI: 0000000000000004
RBP: 00007f1d70a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1d70bb6038 R14: 00007f1d70bb5fa0 R15: 00007ffef94d2a78
 </TASK>