ntfs3(loop7): Mark volume as dirty due to NTFS errors
ntfs3(loop7): Failed to load $Extend (-22).
ntfs3(loop7): Failed to initialize $Extend.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.7.10498/703 is trying to acquire lock:
ffff888039cc3c70 (&ni->file.run_lock#2){++++}-{4:4}, at: run_unpack_ex+0x7e5/0xba0

but task is already holding lock:
ffff888040bac270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x701/0xba0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&wnd->rw_lock){++++}-{4:4}:
       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_set_size+0x164/0x200
       ntfs_extend+0x1d9/0x970
       ntfs_file_write_iter+0x421/0x870
       iter_file_splice_write+0x975/0x10e0
       direct_splice_actor+0x101/0x160
       splice_direct_to_actor+0x5a8/0xcc0
       do_splice_direct+0x181/0x270
       do_sendfile+0x4da/0x7e0
       __se_sys_sendfile64+0xd9/0x190
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ni->file.run_lock#2){++++}-{4:4}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       run_unpack_ex+0x7e5/0xba0
       ntfs_iget5+0x232b/0x37c0
       dir_search_u+0x1df/0x2c0
       ntfs_lookup+0xfb/0x1f0
       path_openat+0x1101/0x3830
       do_filp_open+0x1fa/0x410
       do_sys_openat2+0x121/0x1c0
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

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.7.10498/703:
 #0: ffff888031f5a428 (sb_writers#13){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888039cc71c0 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: path_openat+0x8da/0x3830
 #2: ffff888039cc6f28 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_lookup+0xee/0x1f0
 #3: ffff888040bac270 (&wnd->rw_lock){++++}-{4:4}, at: run_unpack_ex+0x701/0xba0

stack backtrace:
CPU: 1 UID: 0 PID: 703 Comm: syz.7.10498 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_read+0x46/0x2e0
 run_unpack_ex+0x7e5/0xba0
 ntfs_iget5+0x232b/0x37c0
 dir_search_u+0x1df/0x2c0
 ntfs_lookup+0xfb/0x1f0
 path_openat+0x1101/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcc1c58ec29
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:00007fcc1d3a1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcc1c7d5fa0 RCX: 00007fcc1c58ec29
RDX: 0000000000105042 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fcc1c611e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc1c7d6038 R14: 00007fcc1c7d5fa0 R15: 00007fffa92db9f8
 </TASK>
