From: Aurélien Aptel <aaptel@xxxxxxxx> Sent: Friday, August 14, 2020 6:30 PM > I've tried this using libntfs-3g mkfs.ntfs > > # mkfs.ntfs /dev/vb1 > # mount -t ntfs3 /dev/vb1 /mnt > > This already triggered UBSAN: > Then I've tried to copy /etc into it: > ... > # cp -rp /etc /mnt > > But this triggered a NULL ptr deref: > > BUG: kernel NULL pointer dereference, address: 0000000000000028 Thanks! This will be fixed in v2. To give some context: we use our mkfs utility in tests, coupled with a Windows-native one as a reference. P.S. Already have extended this approach with the current mkfs.ntfs utility as well.