loop8: detected capacity change from 0 to 4096
ntfs3(loop8): Different NTFS sector size (2048) and media sector size (512).
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.8.500/8652 is trying to acquire lock:
ffff888022043f78 (mapping.invalidate_lock#11){++++}-{4:4}, at: filemap_fault+0x5c3/0x1290

but task is already holding lock:
ffff88810a024cc0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x300

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&mm->mmap_lock){++++}-{4:4}:
       __might_fault+0xcc/0x130
       _copy_to_user+0x2c/0xb0
       fiemap_fill_next_extent+0x1c0/0x390
       ni_fiemap+0x391/0xbf0
       ntfs_fiemap+0x11d/0x1a0
       do_vfs_ioctl+0x1173/0x1430
       __se_sys_ioctl+0x82/0x170
       do_syscall_64+0xfa/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ni->ni_lock/5){+.+.}-{4:4}:
       __mutex_lock+0x187/0x1350
       ntfs_fallocate+0x57a/0x10b0
       vfs_fallocate+0x669/0x7e0
       file_ioctl+0x611/0x780
       do_vfs_ioctl+0xb33/0x1430
       __se_sys_ioctl+0x82/0x170
       do_syscall_64+0xfa/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (mapping.invalidate_lock#11){++++}-{4:4}:
       __lock_acquire+0x15a6/0x2cf0
       lock_acquire+0x117/0x340
       down_read+0x47/0x2e0
       filemap_fault+0x5c3/0x1290
       __do_fault+0x138/0x390
       do_pte_missing+0x2206/0x3330
       handle_mm_fault+0x1b26/0x32b0
       do_user_addr_fault+0x764/0x1380
       exc_page_fault+0x82/0x100
       asm_exc_page_fault+0x26/0x30
       rep_movs_alternative+0x75/0x90
       _copy_from_user+0x7a/0xb0
       __se_sys_mount+0x18b/0x410
       do_syscall_64+0xfa/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  mapping.invalidate_lock#11 --> &ni->ni_lock/5 --> &mm->mmap_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(&mm->mmap_lock);
                               lock(&ni->ni_lock/5);
                               lock(&mm->mmap_lock);
  rlock(mapping.invalidate_lock#11);

 *** DEADLOCK ***

1 lock held by syz.8.500/8652:
 #0: ffff88810a024cc0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x300

stack backtrace:
CPU: 0 UID: 0 PID: 8652 Comm: syz.8.500 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+0x2e2/0x300
 check_noncircular+0x12e/0x150
 __lock_acquire+0x15a6/0x2cf0
 lock_acquire+0x117/0x340
 down_read+0x47/0x2e0
 filemap_fault+0x5c3/0x1290
 __do_fault+0x138/0x390
 do_pte_missing+0x2206/0x3330
 handle_mm_fault+0x1b26/0x32b0
 do_user_addr_fault+0x764/0x1380
 exc_page_fault+0x82/0x100
 asm_exc_page_fault+0x26/0x30
RIP: 0010:rep_movs_alternative+0x75/0x90
Code: 05 e9 bf 48 04 00 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 29 f8 48 01 c7 48 01 c6 48 29 c1 48 89 c8 48 c1 e9 03 83 e0 07 <f3> 48 a5 89 c1 85 c9 75 91 e9 8d 48 04 00 48 8d 0c c8 eb 86 cc cc
RSP: 0018:ffffc90003a67dd8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000001000 RCX: 00000000000000b0
RDX: 0000000000000001 RSI: 0000200000001000 RDI: ffff888114df0a80
RBP: ffffc90003a67ed0 R08: ffff888114df0fff R09: 1ffff110229be1ff
R10: dffffc0000000000 R11: ffffed10229be200 R12: 0000200000000580
R13: 1ffff9200074cfc8 R14: ffff888114df0000 R15: 0000200000000580
 _copy_from_user+0x7a/0xb0
 __se_sys_mount+0x18b/0x410
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f979938f7c9
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:00007f979a2f9038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f97995e5fa0 RCX: 00007f979938f7c9
RDX: 0000200000000540 RSI: 0000200000000500 RDI: 0000000000000000
RBP: 00007f97993f297f R08: 0000200000000580 R09: 0000000000000000
R10: 000000000080c000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f97995e6038 R14: 00007f97995e5fa0 R15: 00007ffd630eec48
 </TASK>
