ntfs3: loop3: Failed to initialize $Extend.
======================================================
WARNING: possible circular locking dependency detected
6.10.0-syzkaller-10729-g3c3ff7be9729 #0 Not tainted
------------------------------------------------------
syz.3.533/9691 is trying to acquire lock:
ffff88807cfd7398 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0xaa/0x120 mm/memory.c:6234

but task is already holding lock:
ffff888061e29060 (&ni->file.run_lock#3){++++}-{3:3}, at: ni_fiemap+0x373/0x1230 fs/ntfs3/frecord.c:1961

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&ni->file.run_lock#3){++++}-{3:3}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
       down_read+0xb1/0xa40 kernel/locking/rwsem.c:1526
       attr_data_get_block+0x2e3/0x2e10 fs/ntfs3/attrib.c:902
       ntfs_get_block_vbo+0x3e4/0xd50 fs/ntfs3/inode.c:599
       __block_write_begin_int+0x50c/0x1a70 fs/buffer.c:2125
       __block_write_begin fs/buffer.c:2174 [inline]
       block_write_begin+0x9b/0x1e0 fs/buffer.c:2235
       ntfs_extend_initialized_size+0x3f5/0x7a0 fs/ntfs3/file.c:144
       ntfs_file_mmap+0x627/0x880 fs/ntfs3/file.c:306
       call_mmap include/linux/fs.h:2129 [inline]
       mmap_region+0xe8f/0x2090 mm/mmap.c:2886
       do_mmap+0x8ad/0xfa0 mm/mmap.c:1397
       vm_mmap_pgoff+0x1dd/0x3d0 mm/util.c:588
       ksys_mmap_pgoff+0x4f1/0x720 mm/mmap.c:1443
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&mm->mmap_lock){++++}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3133 [inline]
       check_prevs_add kernel/locking/lockdep.c:3252 [inline]
       validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868
       __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
       __might_fault+0xc6/0x120 mm/memory.c:6234
       _copy_to_user+0x2a/0xb0 lib/usercopy.c:41
       copy_to_user include/linux/uaccess.h:191 [inline]
       fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:145
       ni_fiemap+0xa5e/0x1230 fs/ntfs3/frecord.c:2065
       ntfs_fiemap+0x132/0x180 fs/ntfs3/file.c:1215
       ioctl_fiemap fs/ioctl.c:220 [inline]
       do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:841
       __do_sys_ioctl fs/ioctl.c:905 [inline]
       __se_sys_ioctl+0x81/0x170 fs/ioctl.c:893
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(&ni->file.run_lock#3);
                               lock(&mm->mmap_lock);
                               lock(&ni->file.run_lock#3);
  rlock(&mm->mmap_lock);

 *** DEADLOCK ***

2 locks held by syz.3.533/9691:
 #0: ffff888061e28fb0 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1123 [inline]
 #0: ffff888061e28fb0 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_fiemap+0xff/0x180 fs/ntfs3/file.c:1213
 #1: ffff888061e29060 (&ni->file.run_lock#3){++++}-{3:3}, at: ni_fiemap+0x373/0x1230 fs/ntfs3/frecord.c:1961

stack backtrace:
CPU: 0 PID: 9691 Comm: syz.3.533 Not tainted 6.10.0-syzkaller-10729-g3c3ff7be9729 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2186
 check_prev_add kernel/locking/lockdep.c:3133 [inline]
 check_prevs_add kernel/locking/lockdep.c:3252 [inline]
 validate_chain+0x18e0/0x5900 kernel/locking/lockdep.c:3868
 __lock_acquire+0x137a/0x2040 kernel/locking/lockdep.c:5142
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759
 __might_fault+0xc6/0x120 mm/memory.c:6234
 _copy_to_user+0x2a/0xb0 lib/usercopy.c:41
 copy_to_user include/linux/uaccess.h:191 [inline]
 fiemap_fill_next_extent+0x235/0x410 fs/ioctl.c:145
 ni_fiemap+0xa5e/0x1230 fs/ntfs3/frecord.c:2065
 ntfs_fiemap+0x132/0x180 fs/ntfs3/file.c:1215
 ioctl_fiemap fs/ioctl.c:220 [inline]
 do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:841
 __do_sys_ioctl fs/ioctl.c:905 [inline]
 __se_sys_ioctl+0x81/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f928e175b59
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:00007f928ef83048 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f928e305f60 RCX: 00007f928e175b59
RDX: 00000000200002c0 RSI: 00000000c020660b RDI: 0000000000000006
RBP: 00007f928e1e4e5d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f928e305f60 R15: 00007ffd6cfce4e8
 </TASK>