loop2: detected capacity change from 0 to 4096
ntfs3: loop2: Different NTFS sector size (2048) and media sector size (512).
ntfs3: loop2: Failed to initialize $Extend/$ObjId.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.2.854/8222 is trying to acquire lock:
ffff88805c883cb0 (&ni->file.run_lock#2){++++}-{3:3}, at: run_unpack_ex+0x858/0xc40 fs/ntfs3/run.c:1138

but task is already holding lock:
ffff88805dadc270 (&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
       ntfs_look_for_free_space+0xdf/0x630 fs/ntfs3/fsntfs.c:362
       attr_allocate_clusters+0x1be/0x6b0 fs/ntfs3/attrib.c:159
       attr_set_size+0x1406/0x2ad0 fs/ntfs3/attrib.c:577
       ntfs_extend_mft+0x16a/0x470 fs/ntfs3/fsntfs.c:512
       ntfs_look_free_mft+0x667/0xd90 fs/ntfs3/fsntfs.c:709
       ntfs_create_inode+0x52b/0x3560 fs/ntfs3/inode.c:1345
       ntfs_mkdir+0x42/0x60 fs/ntfs3/namei.c:222
       vfs_mkdir+0x2a5/0x470 fs/namei.c:4121
       do_mkdirat+0x1dc/0x450 fs/namei.c:4144
       __do_sys_mkdirat fs/namei.c:4159 [inline]
       __se_sys_mkdirat fs/namei.c:4157 [inline]
       __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157
       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
       ntfs_dir_emit fs/ntfs3/dir.c:338 [inline]
       ntfs_read_hdr+0x77c/0xbd0 fs/ntfs3/dir.c:386
       ntfs_readdir+0x8c9/0xe00 fs/ntfs3/dir.c:496
       iterate_dir+0x1bd/0x590 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+0x55/0xb0 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 ***

3 locks held by syz.2.854/8222:
 #0: ffff8880236d6ac8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2a3/0x330 fs/file.c:1040
 #1: ffff88805c880b10 (&type->i_mutex_dir_key#13){++++}-{3:3}, at: iterate_dir+0xcb/0x590 fs/readdir.c:99
 #2: ffff88805dadc270 (&wnd->rw_lock){++++}-{3:3}, at: run_unpack_ex+0x779/0xc40 fs/ntfs3/run.c:1119

stack backtrace:
CPU: 0 PID: 8222 Comm: syz.2.854 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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
 ntfs_dir_emit fs/ntfs3/dir.c:338 [inline]
 ntfs_read_hdr+0x77c/0xbd0 fs/ntfs3/dir.c:386
 ntfs_readdir+0x8c9/0xe00 fs/ntfs3/dir.c:496
 iterate_dir+0x1bd/0x590 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+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8e2e99ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8e2f832028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f8e2ec15fa0 RCX: 00007f8e2e99ce59
RDX: 00000000000000f4 RSI: 0000200000000140 RDI: 0000000000000004
RBP: 00007f8e2ea32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8e2ec16038 R14: 00007f8e2ec15fa0 R15: 00007ffd8b998a48
 </TASK>