loop7: detected capacity change from 0 to 4096
ntfs3(loop7): Different NTFS sector size (1024) and media sector size (512).
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.7.2980/14634 is trying to acquire lock:
ffff88801fec2270 (&wnd->rw_lock){++++}-{4:4}, at: ntfs_look_for_free_space+0xd3/0x600

but task is already holding lock:
ffff888011766ee8 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_extend_mft+0x13d/0x450

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&ni->file.run_lock#2){++++}-{4:4}:
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       run_unpack_ex+0x7e5/0xba0
       ntfs_iget5+0x232b/0x37e0
       dir_search_u+0x1df/0x2c0
       ntfs_lookup+0xfb/0x1f0
       __lookup_slow+0x297/0x3d0
       lookup_slow+0x53/0x70
       walk_component+0x2d2/0x400
       path_lookupat+0x163/0x430
       filename_lookup+0x212/0x570
       user_path_at+0x3a/0x60
       do_sys_truncate+0xa3/0x190
       __x64_sys_truncate+0x5b/0x70
       do_syscall_64+0xfa/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&wnd->rw_lock){++++}-{4:4}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       lock_acquire+0x120/0x360
       down_write_nested+0x9d/0x200
       ntfs_look_for_free_space+0xd3/0x600
       attr_allocate_clusters+0x1c1/0x6d0
       attr_set_size+0x14a4/0x2c70
       ntfs_extend_mft+0x162/0x450
       ntfs_look_free_mft+0x5f8/0xd50
       ni_create_attr_list+0x8ff/0x13d0
       ni_ins_attr_ext+0x43e/0xb50
       ni_add_name+0x6df/0xc90
       ni_rename+0x4a/0x100
       ntfs_rename+0x735/0xbf0
       vfs_rename+0xb34/0xe80
       do_renameat2+0x6a2/0xa50
       __x64_sys_rename+0x82/0x90
       do_syscall_64+0xfa/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ni->file.run_lock#2);
                               lock(&wnd->rw_lock);
                               lock(&ni->file.run_lock#2);
  lock(&wnd->rw_lock);

 *** DEADLOCK ***

7 locks held by syz.7.2980/14634:
 #0: ffff88802103a420 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888011760ae0 (&type->i_mutex_dir_key#13/1){+.+.}-{4:4}, at: do_renameat2+0x3b9/0xa50
 #2: ffff888011761970 (&sb->s_type->i_mutex_key#28/4){+.+.}-{4:4}, at: vfs_rename+0x665/0xe80
 #3: ffff888011760848 (&ni->ni_lock#2/6){+.+.}-{4:4}, at: ntfs_rename+0x6de/0xbf0
 #4: ffff8880117616d8 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_rename+0x6f7/0xbf0
 #5: ffff88801fec2128 (&wnd->rw_lock/1){+.+.}-{4:4}, at: ntfs_look_free_mft+0x163/0xd50
 #6: ffff888011766ee8 (&ni->file.run_lock#2){++++}-{4:4}, at: ntfs_extend_mft+0x13d/0x450

stack backtrace:
CPU: 0 UID: 0 PID: 14634 Comm: syz.7.2980 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_circular_bug+0x2ee/0x310
 check_noncircular+0x134/0x160
 validate_chain+0xb9b/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 down_write_nested+0x9d/0x200
 ntfs_look_for_free_space+0xd3/0x600
 attr_allocate_clusters+0x1c1/0x6d0
 attr_set_size+0x14a4/0x2c70
 ntfs_extend_mft+0x162/0x450
 ntfs_look_free_mft+0x5f8/0xd50
 ni_create_attr_list+0x8ff/0x13d0
 ni_ins_attr_ext+0x43e/0xb50
 ni_add_name+0x6df/0xc90
 ni_rename+0x4a/0x100
 ntfs_rename+0x735/0xbf0
 vfs_rename+0xb34/0xe80
 do_renameat2+0x6a2/0xa50
 __x64_sys_rename+0x82/0x90
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f95de58ec29
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:00007f95df4d1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f95de7d5fa0 RCX: 00007f95de58ec29
RDX: 0000000000000000 RSI: 0000200000000400 RDI: 0000200000006200
RBP: 00007f95de611e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f95de7d6038 R14: 00007f95de7d5fa0 R15: 00007ffca227e2c8
 </TASK>
ntfs3(loop7): ino=0, attr_set_size
ntfs3(loop7): Mark volume as dirty due to NTFS errors
ntfs3(loop7): ino=0, attr_set_size
ntfs3(loop7): ino=0, attr_set_size
