======================================================
WARNING: possible circular locking dependency detected
6.4.0-syzkaller-01406-ge8f75c0270d9 #0 Not tainted
------------------------------------------------------
syz-executor183/4994 is trying to acquire lock:
ffff888071f868a0 (&ni->ni_lock#2/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1121 [inline]
ffff888071f868a0 (&ni->ni_lock#2/4){+.+.}-{3:3}, at: attr_data_get_block+0x32c/0x19f0 fs/ntfs3/attrib.c:918

but task is already holding lock:
ffff8880125483e8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:110 [inline]
ffff8880125483e8 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x158/0x3b0 mm/util.c:541

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&mm->mmap_lock){++++}-{3:3}:
       __might_fault mm/memory.c:5732 [inline]
       __might_fault+0x115/0x190 mm/memory.c:5725
       _copy_to_user+0x2b/0xc0 lib/usercopy.c:36
       copy_to_user include/linux/uaccess.h:191 [inline]
       fiemap_fill_next_extent+0x217/0x370 fs/ioctl.c:144
       ni_fiemap+0x2f9/0xc00 fs/ntfs3/frecord.c:1944
       ntfs_fiemap+0xcc/0x120 fs/ntfs3/file.c:1166
       ioctl_fiemap fs/ioctl.c:219 [inline]
       do_vfs_ioctl+0x478/0x16c0 fs/ioctl.c:810
       __do_sys_ioctl fs/ioctl.c:868 [inline]
       __se_sys_ioctl fs/ioctl.c:856 [inline]
       __x64_sys_ioctl+0x10c/0x210 fs/ioctl.c:856
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #0 (&ni->ni_lock#2/4){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3113 [inline]
       check_prevs_add kernel/locking/lockdep.c:3232 [inline]
       validate_chain kernel/locking/lockdep.c:3847 [inline]
       __lock_acquire+0x2fcd/0x5f30 kernel/locking/lockdep.c:5088
       lock_acquire kernel/locking/lockdep.c:5705 [inline]
       lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670
       __mutex_lock_common kernel/locking/mutex.c:603 [inline]
       __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747
       ni_lock fs/ntfs3/ntfs_fs.h:1121 [inline]
       attr_data_get_block+0x32c/0x19f0 fs/ntfs3/attrib.c:918
       ntfs_file_mmap+0x47e/0x6a0 fs/ntfs3/file.c:291
       call_mmap include/linux/fs.h:1877 [inline]
       mmap_region+0x6a0/0x28e0 mm/mmap.c:2649
       do_mmap+0x837/0xf60 mm/mmap.c:1394
       vm_mmap_pgoff+0x1a2/0x3b0 mm/util.c:543
       ksys_mmap_pgoff+0x42b/0x5b0 mm/mmap.c:1440
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&mm->mmap_lock);
                               lock(&ni->ni_lock#2/4);
                               lock(&mm->mmap_lock);
  lock(&ni->ni_lock#2/4);

 *** DEADLOCK ***

1 lock held by syz-executor183/4994:
 #0: ffff8880125483e8 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:110 [inline]
 #0: ffff8880125483e8 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x158/0x3b0 mm/util.c:541

stack backtrace:
CPU: 1 PID: 4994 Comm: syz-executor183 Not tainted 6.4.0-syzkaller-01406-ge8f75c0270d9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2188
 check_prev_add kernel/locking/lockdep.c:3113 [inline]
 check_prevs_add kernel/locking/lockdep.c:3232 [inline]
 validate_chain kernel/locking/lockdep.c:3847 [inline]
 __lock_acquire+0x2fcd/0x5f30 kernel/locking/lockdep.c:5088
 lock_acquire kernel/locking/lockdep.c:5705 [inline]
 lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5670
 __mutex_lock_common kernel/locking/mutex.c:603 [inline]
 __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747
 ni_lock fs/ntfs3/ntfs_fs.h:1121 [inline]
 attr_data_get_block+0x32c/0x19f0 fs/ntfs3/attrib.c:918
 ntfs_file_mmap+0x47e/0x6a0 fs/ntfs3/file.c:291
 call_mmap include/linux/fs.h:1877 [inline]
 mmap_region+0x6a0/0x28e0 mm/mmap.c:2649
 do_mmap+0x837/0xf60 mm/mmap.c:1394
 vm_mmap_pgoff+0x1a2/0x3b0 mm/util.c:543
 ksys_mmap_pgoff+0x42b/0x5b0 mm/mmap.c:1440
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7faa24965d19
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffda0a1ef18 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007faa24965d19
RDX: 0000000000800006 RSI: 000000000000a000 RDI: 0000000020001000
RBP: 00007faa24925320 R08: 0000000000000006 R09: 0000000000000000
R10: 0000000000000011 R11: 0000000000000246 R12: 00007faa249253b0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000