/usr/src/linux-source-4.4.0/debian.master/d-i/ is in linux-source-4.4.0 4.4.0-81.104.
This file is owned by root:root, with mode 0o755.
..
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-firmware.armhf-generic
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-firmware.armhf-generic-lpae
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-modules.amd64-virtual
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-modules.arm64-generic
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-modules.armhf-generic
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-modules.armhf-generic-lpae
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-modules.i386-virtual
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-modules.powerpc
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-modules.ppc64el-generic
/usr/src/linux-source-4.4.0/debian.master/d-i/exclude-modules.s390x
/usr/src/linux-source-4.4.0/debian.master/d-i/firmware/
/usr/src/linux-source-4.4.0/debian.master/d-i/firmware/README.txt
/usr/src/linux-source-4.4.0/debian.master/d-i/firmware/nic-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/firmware/scsi-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/kernel-versions.in
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-powerpc/
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-powerpc/block-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-powerpc/message-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-powerpc/nic-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-powerpc/scsi-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-powerpc/storage-core-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-s390x/
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-s390x/dasd-extra-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules-s390x/dasd-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/block-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/crypto-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/fat-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/fb-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/firewire-core-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/floppy-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/fs-core-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/fs-secondary-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/input-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/ipmi-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/irda-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/kernel-image
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/md-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/message-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/mouse-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/multipath-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/nfs-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/nic-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/nic-pcmcia-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/nic-shared-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/nic-usb-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/parport-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/pata-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/pcmcia-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/pcmcia-storage-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/plip-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/ppp-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/sata-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/scsi-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/serial-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/speakup-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/storage-core-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/usb-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/virtio-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/modules/vlan-modules
/usr/src/linux-source-4.4.0/debian.master/d-i/package-list