git: Fix null dereference bug in fuse and re-enable it.

[Tomohiro Kusumi]

What does potential NULL deref have anything to do with re-enabling ?
Please re-disable.

There are reasons to not enable FUSE in our build.
See bd699eeae3b.

2024年3月13日(水) 13:30 Matthew Dillon <dillon at crater.dragonflybsd.org>:
>
>
> commit df8dfe6e4994f81f7a8a3cf7c5fbdce4451ac41b
> Author: Kyle Butt <kyle at iteratee.net>
> Date:   Wed Mar 13 14:04:32 2024 -0600
>
>     Fix null dereference bug in fuse and re-enable it.
>
>     There was a null dereference bug in fuse if the subtype was null.
>     subtype is supposed to be optional, as demonstrated by the code, so test
>     it for null before copying it in from userspace.
>
>     Remove the redundant memcpy which appears to have been missed when the
>     code was changed to memset/copyinstr.
>
> Summary of changes:
>  sys/vfs/Makefile           |  2 +-
>  sys/vfs/fuse/fuse_vfsops.c | 15 ++++++++-------
>  2 files changed, 9 insertions(+), 8 deletions(-)
>
> http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/df8dfe6e4994f81f7a8a3cf7c5fbdce4451ac41b
>
>
> --
> DragonFly BSD source repository