[Xperia Z4/Z3+ Q&A, Help & Troubleshooting] dl12345:
I'll give that a try although SELinux is running in permissive mode. It looks like the init process might not be completing the various init scripts correctly. The system boots as I can get an adb shell and the various partitions appear to be mounted correctly although the display only shows the Android logo and nothing more. The device gets very hot after a few minutes.

It's not the kernel either as I compiled a new one from source and it exhibits the same behaviour....

rootfs / rootfs ro,seclabel,relatime 0 0
tmpfs /dev tmpfs rw,seclabel,nosuid,relatime,size=1425884k,nr_inodes=356471,mode=755 0 0
devpts /dev/pts devpts rw,seclabel,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,seclabel,relatime 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
none /sys/fs/cgroup tmpfs rw,seclabel,relatime,size=1425884k,nr_inodes=356471,mode=750,gid=1000 0 0
tmpfs /mnt/asec tmpfs rw,seclabel,relatime,size=1425884k,nr_inodes=356471,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,seclabel,relatime,size=1425884k,nr_inodes=356471,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
tmpfs /tmp tmpfs rw,seclabel,nosuid,relatime,size=1425884k,nr_inodes=356471,mode=755 0 0
/dev/block/platform/soc.0/by-name/system /system ext4 ro,seclabel,relatime,discard,data=ordered 0 0
/dev/block/platform/soc.0/by-name/userdata /data ext4 rw,seclabel,nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered 0 0
/dev/block/platform/soc.0/by-name/modem /firmware vfat rw,relatime,uid=1000,gid=1000,fmask=0337,dmask=0227,codepage=437,iocharset=iso8859-1,shortname=lower,errors=remount-ro 0 0
adb /dev/usb-ffs/adb functionfs rw,relatime 0 0

and the output of ps -Z...

LABEL USER PID PPID NAME
u:r:init:s0 root 1 0 /init
u:r:kernel:s0 root 2 0 kthreadd
u:r:kernel:s0 root 3 2 ksoftirqd/0
u:r:kernel:s0 root 5 2 kworker/0:0H
u:r:kernel:s0 root 6 2 kworker/u16:0
u:r:kernel:s0 root 7 2 migration/0
u:r:kernel:s0 root 8 2 rcu_preempt
u:r:kernel:s0 root 9 2 rcu_bh
u:r:kernel:s0 root 10 2 rcu_sched
u:r:kernel:s0 root 11 2 migration/1
u:r:kernel:s0 root 12 2 ksoftirqd/1
u:r:kernel:s0 root 13 2 kworker/1:0
u:r:kernel:s0 root 14 2 kworker/1:0H
u:r:kernel:s0 root 15 2 migration/2
u:r:kernel:s0 root 16 2 ksoftirqd/2
u:r:kernel:s0 root 17 2 kworker/2:0
u:r:kernel:s0 root 18 2 kworker/2:0H
u:r:kernel:s0 root 19 2 migration/3
u:r:kernel:s0 root 20 2 ksoftirqd/3
u:r:kernel:s0 root 21 2 kworker/3:0
u:r:kernel:s0 root 22 2 kworker/3:0H
u:r:kernel:s0 root 23 2 migration/4
u:r:kernel:s0 root 24 2 ksoftirqd/4
u:r:kernel:s0 root 26 2 kworker/4:0H
u:r:kernel:s0 root 27 2 migration/5
u:r:kernel:s0 root 28 2 ksoftirqd/5
u:r:kernel:s0 root 30 2 kworker/5:0H
u:r:kernel:s0 root 31 2 khelper
u:r:kernel:s0 root 32 2 netns
u:r:kernel:s0 root 33 2 perf
u:r:kernel:s0 root 34 2 kworker/0:1
u:r:kernel:s0 root 35 2 kworker/1:1
u:r:kernel:s0 root 36 2 kworker/2:1
u:r:kernel:s0 root 37 2 kworker/3:1
u:r:kernel:s0 root 40 2 kworker/1:1H
u:r:kernel:s0 root 41 2 smd_channel_clo
u:r:kernel:s0 root 42 2 smsm_cb_wq
u:r:kernel:s0 root 43 2 kworker/u16:1
u:r:kernel:s0 root 44 2 deferwq
u:r:kernel:s0 root 45 2 kworker/u17:0
u:r:kernel:s0 root 46 2 rpm-smd
u:r:kernel:s0 root 47 2 kworker/u17:1
u:r:kernel:s0 root 48 2 irq/48-cpr
u:r:kernel:s0 root 49 2 irq/51-cpr
u:r:kernel:s0 root 50 2 mpm
u:r:kernel:s0 root 52 2 writeback
u:r:kernel:s0 root 53 2 bioset
u:r:kernel:s0 root 54 2 crypto
u:r:kernel:s0 root 55 2 kblockd
u:r:kernel:s0 root 56 2 khubd
u:r:kernel:s0 root 57 2 system
u:r:kernel:s0 root 58 2 ipa_power_mgmt
u:r:kernel:s0 root 59 2 sps_ipa_power_m
u:r:kernel:s0 root 60 2 ipawq14
u:r:kernel:s0 root 61 2 iparepwq14
u:r:kernel:s0 root 62 2 ipawq43
u:r:kernel:s0 root 63 2 iparepwq43
u:r:kernel:s0 root 64 2 ipawq13
u:r:kernel:s0 root 65 2 iparepwq13
u:r:kernel:s0 root 66 2 ipa_power_mgmt
u:r:kernel:s0 root 67 2 ipa_rm_wq
u:r:kernel:s0 root 68 2 ipa_interrupt_w
u:r:kernel:s0 root 69 2 irq/261-msm_iom
u:r:kernel:s0 root 70 2 irq/263-msm_iom
u:r:kernel:s0 root 71 2 irq/261-msm_iom
u:r:kernel:s0 root 72 2 irq/263-msm_iom
u:r:kernel:s0 root 73 2 irq/261-msm_iom
u:r:kernel:s0 root 74 2 irq/263-msm_iom
u:r:kernel:s0 root 75 2 irq/261-msm_iom
u:r:kernel:s0 root 76 2 irq/263-msm_iom
u:r:kernel:s0 root 77 2 irq/261-msm_iom
u:r:kernel:s0 root 78 2 irq/263-msm_iom
u:r:kernel:s0 root 79 2 irq/261-msm_iom
u:r:kernel:s0 root 80 2 irq/263-msm_iom
u:r:kernel:s0 root 81 2 irq/261-msm_iom
u:r:kernel:s0 root 82 2 irq/263-msm_iom
u:r:kernel:s0 root 83 2 irq/102-msm_iom
u:r:kernel:s0 root 84 2 irq/102-msm_iom
u:r:kernel:s0 root 85 2 irq/102-msm_iom
u:r:kernel:s0 root 86 2 irq/102-msm_iom
u:r:kernel:s0 root 87 2 irq/74-msm_iomm
u:r:kernel:s0 root 88 2 irq/75-msm_iomm
u:r:kernel:s0 root 89 2 irq/75-msm_iomm
u:r:kernel:s0 root 90 2 irq/75-msm_iomm
u:r:kernel:s0 root 91 2 irq/75-msm_iomm
u:r:kernel:s0 root 92 2 irq/273-msm_iom
u:r:kernel:s0 root 93 2 irq/273-msm_iom
u:r:kernel:s0 root 94 2 irq/272-msm_iom
u:r:kernel:s0 root 95 2 irq/97-msm_iomm
u:r:kernel:s0 root 96 2 irq/97-msm_iomm
u:r:kernel:s0 root 97 2 irq/97-msm_iomm
u:r:kernel:s0 root 98 2 irq/350-msm_iom
u:r:kernel:s0 root 99 2 irq/350-msm_iom
u:r:kernel:s0 root 100 2 irq/350-msm_iom
u:r:kernel:s0 root 101 2 irq/298-msm_iom
u:r:kernel:s0 root 102 2 irq/298-msm_iom
u:r:kernel:s0 root 103 2 irq/298-msm_iom
u:r:kernel:s0 root 104 2 irq/79-msm_iomm
u:r:kernel:s0 root 105 2 irq/78-msm_iomm
u:r:kernel:s0 root 106 2 irq/78-msm_iomm
u:r:kernel:s0 root 107 2 devfreq_wq
u:r:kernel:s0 root 108 2 cfg80211
u:r:kernel:s0 root 109 2 irq/15-bcl_vbat
u:r:kernel:s0 root 110 2 irq/460-bcl_iba
u:r:kernel:s0 root 133 2 kswapd0
u:r:kernel:s0 root 134 2 fsnotify_mark
u:r:kernel:s0 root 135 2 cifsiod
u:r:kernel:s0 root 155 2 ad_calc_wq
u:r:kernel:s0 root 156 2 rot_commit_work
u:r:kernel:s0 root 157 2 mdss_dsi_event
u:r:kernel:s0 root 158 2 hdmi_tx_workq
u:r:kernel:s0 root 159 2 unblanker
u:r:kernel:s0 root 160 2 apr_driver
u:r:kernel:s0 root 161 2 pil_vote_wq
u:r:kernel:s0 root 162 2 shm_svc
u:r:kernel:s0 root 163 2 qmi_hndl0000000
u:r:kernel:s0 root 164 2 msm_ipc_router
u:r:kernel:s0 root 165 2 k_hsuart
u:r:kernel:s0 root 166 2 msm_serial_hs_0
u:r:kernel:s0 root 167 2 msm_serial_hs_0
u:r:kernel:s0 root 168 2 hwrng
u:r:kernel:s0 root 169 2 diag_real_time_
u:r:kernel:s0 root 170 2 diag_modem_data
u:r:kernel:s0 root 171 2 diag_lpass_data
u:r:kernel:s0 root 172 2 diag_wcnss_data
u:r:kernel:s0 root 173 2 diag_sensors_da
u:r:kernel:s0 root 174 2 diag_wq
u:r:kernel:s0 root 175 2 DIAG_USB_diag
u:r:kernel:s0 root 176 2 diag_cntl_wq
u:r:kernel:s0 root 177 2 diag_dci_wq
u:r:kernel:s0 root 178 2 kgsl-3d0
u:r:kernel:s0 root 179 2 kgsl-events
u:r:kernel:s0 root 180 2 governor_msm_ad
u:r:kernel:s0 root 181 2 kgsl_devfreq_wq
u:r:kernel:s0 root 203 2 spi0
u:r:kernel:s0 root 204 2 usbnet
u:r:kernel:s0 root 205 2 sharedmem_qmi_w
u:r:kernel:s0 root 206 2 qmi_hndl0000000
u:r:kernel:s0 root 207 2 kworker/u16:3
u:r:kernel:s0 root 208 2 irq/212-msm_dwc
u:r:kernel:s0 root 209 2 k_gserial
u:r:kernel:s0 root 210 2 uether
u:r:kernel:s0 root 214 2 msm_cpp_workque
u:r:kernel:s0 root 215 2 irq/506-clearpa
u:r:kernel:s0 root 216 2 therm_core:noti
u:r:kernel:s0 root 217 2 therm_core:noti
u:r:kernel:s0 root 218 2 therm_core:noti
u:r:kernel:s0 root 219 2 therm_core:noti
u:r:kernel:s0 root 220 2 therm_core:noti
u:r:kernel:s0 root 221 2 therm_core:noti
u:r:kernel:s0 root 222 2 therm_core:noti
u:r:kernel:s0 root 223 2 therm_core:noti
u:r:kernel:s0 root 224 2 therm_core:noti
u:r:kernel:s0 root 225 2 therm_core:noti
u:r:kernel:s0 root 226 2 therm_core:noti
u:r:kernel:s0 root 227 2 therm_core:noti
u:r:kernel:s0 root 228 2 therm_core:noti
u:r:kernel:s0 root 229 2 therm_core:noti
u:r:kernel:s0 root 230 2 therm_core:noti
u:r:kernel:s0 root 231 2 therm_core:noti
u:r:kernel:s0 root 232 2 therm_core:noti
u:r:kernel:s0 root 233 2 irq/216-tsens_i
u:r:kernel:s0 root 234 2 therm_core:noti
u:r:kernel:s0 root 235 2 therm_core:noti
u:r:kernel:s0 root 236 2 therm_core:noti
u:r:kernel:s0 root 237 2 therm_core:noti
u:r:kernel:s0 root 238 2 therm_core:noti
u:r:kernel:s0 root 239 2 therm_core:noti
u:r:kernel:s0 root 240 2 therm_core:noti
u:r:kernel:s0 root 241 2 dm_bufio_cache
u:r:kernel:s0 root 242 2 cfinteractive
u:r:kernel:s0 root 243 2 irq/170-f982490
u:r:kernel:s0 root 244 2 kworker/5:3
u:r:kernel:s0 root 245 2 irq/253-f98a490
u:r:kernel:s0 root 246 2 irq/501-qpnp_wl
u:r:kernel:s0 root 247 2 binder
u:r:kernel:s0 root 248 2 usb_bam_wq
u:r:kernel:s0 root 249 2 irq/224-spdm_bw
u:r:kernel:s0 root 250 2 krfcommd
u:r:kernel:s0 root 251 2 irq/606-adsp
u:r:kernel:s0 root 252 2 irq/638-modem
u:r:kernel:s0 root 253 2 msm_vidc_worker
u:r:kernel:s0 root 254 2 pm_workerq_venu
u:r:kernel:s0 root 255 2 id-polling_wq
u:r:kernel:s0 root 256 2 kworker/u16:4
u:r:kernel:s0 root 257 2 mmcqd/0
u:r:kernel:s0 root 258 2 mmcqd/0rpmb
u:r:kernel:s0 root 259 2 kworker/5:4
u:r:kernel:s0 root 260 2 kworker/4:2
u:r:kernel:s0 root 261 2 therm_core:noti
u:r:kernel:s0 root 262 2 irq/464-chg-err
u:r:kernel:s0 root 263 2 irq/9-chg-taper
u:r:kernel:s0 root 264 2 irq/10-chg-tcc-
u:r:kernel:s0 root 265 2 irq/8-chg-rechg
u:r:kernel:s0 root 266 2 irq/468-chg-p2f
u:r:kernel:s0 root 267 2 irq/469-batt-ho
u:r:kernel:s0 root 268 2 irq/11-batt-war
u:r:kernel:s0 root 269 2 irq/13-batt-coo
u:r:kernel:s0 root 270 2 irq/12-batt-col
u:r:kernel:s0 root 271 2 irq/7-batt-miss
u:r:kernel:s0 root 272 2 irq/470-batt-lo
u:r:kernel:s0 root 273 2 irq/1-usbin-uv
u:r:kernel:s0 root 274 2 irq/2-usbin-ov
u:r:kernel:s0 root 275 2 irq/3-usbin-src
u:r:kernel:s0 root 276 2 irq/4-otg-fail
u:r:kernel:s0 root 277 2 irq/5-otg-oc
u:r:kernel:s0 root 278 2 irq/6-aicl-done
u:r:kernel:s0 root 279 2 irq/472-usbid-c
u:r:kernel:s0 root 280 2 irq/473-dcin-uv
u:r:kernel:s0 root 281 2 irq/475-power-o
u:r:kernel:s0 root 282 2 irq/476-temp-sh
u:r:kernel:s0 root 283 2 irq/477-safety-
u:r:kernel:s0 root 284 2 rq_stats
u:r:kernel:s0 root 285 2 sb-1
u:r:kernel:s0 root 286 2 irq/195-ngd_sli
u:r:kernel:s0 root 287 2 ngd_rx_thread1
u:r:kernel:s0 root 288 2 ngd_notify_sl1
u:r:kernel:s0 root 289 2 k_bam_data
u:r:kernel:s0 root 290 2 f_mtp
u:r:kernel:s0 root 291 2 file-storage
u:r:kernel:s0 root 292 2 msm-core:sampli
u:r:kernel:s0 root 293 2 msm_thermal:hot
u:r:kernel:s0 root 294 2 msm_thermal:fre
u:r:kernel:s0 root 295 2 msm_thermal:the
u:r:kernel:s0 root 296 2 therm_core:noti
u:r:kernel:s0 root 297 2 therm_core:noti
u:r:kernel:s0 root 298 2 therm_core:noti
u:r:kernel:s0 root 299 2 therm_core:noti
u:r:kernel:s0 root 300 2 therm_core:noti
u:r:kernel:s0 root 301 2 therm_core:noti
u:r:kernel:s0 root 302 2 therm_core:noti
u:r:kernel:s0 root 303 2 therm_core:noti
u:r:kernel:s0 root 304 2 therm_core:noti
u:r:kernel:s0 root 305 2 boost_sync/0
u:r:kernel:s0 root 306 2 boost_sync/1
u:r:kernel:s0 root 307 2 boost_sync/2
u:r:kernel:s0 root 308 2 boost_sync/3
u:r:kernel:s0 root 309 2 boost_sync/4
u:r:kernel:s0 root 310 2 boost_sync/5
u:r:kernel:s0 root 311 2 boost_sync/6
u:r:kernel:s0 root 312 2 boost_sync/7
u:r:kernel:s0 root 313 2 kworker/4:3
u:r:kernel:s0 root 314 2 ipa_A7_svc
u:r:kernel:s0 root 315 2 qmi_hndl0000000
u:r:kernel:s0 root 316 2 clnt_req
u:r:kernel:s0 root 317 2 kworker/u16:5
u:r:kernel:s0 root 318 2 clnt_resp
u:r:kernel:s0 root 319 2 clnt_req
u:r:kernel:s0 root 320 2 wl_event_handle
u:r:kernel:s0 root 321 2 dhd_watchdog_th
u:r:ueventd:s0 root 322 1 /sbin/ueventd
u:r:kernel:s0 root 324 2 kworker/0:1H
u:r:kernel:s0 root 325 2 jbd2/mmcblk0p43
u:r:kernel:s0 root 326 2 ext4-dio-unwrit
u:r:kernel:s0 root 330 2 jbd2/mmcblk0p42
u:r:kernel:s0 root 331 2 ext4-dio-unwrit
u:r:kernel:s0 root 346 2 IPCRTR
u:r:kernel:s0 root 347 2 kworker/0:2
u:r:kernel:s0 root 348 2 adsp_IPCRTR
u:r:kernel:s0 root 349 2 kworker/0:3
u:r:kernel:s0 root 350 2 msm_slim_qmi_cl
u:r:kernel:s0 root 351 2 qmi_hndl0000000
u:r:logd:s0 logd 352 1 /system/bin/logd
u:r:healthd:s0 root 353 1 /sbin/healthd
u:r:lmkd:s0 root 354 1 /system/bin/lmkd
u:r:servicemanager:s0 system 355 1 /system/bin/servicemanager
u:r:vold:s0 root 356 1 /system/bin/vold
u:r:kernel:s0 root 357 2 kworker/3:1H
u:r:surfaceflinger:s0 system 358 1 /system/bin/surfaceflinger
u:r:tad:s0 root 359 1 /system/vendor/bin/tad_static
u:r:init:s0 nobody 360 1 /system/vendor/bin/rmt_storage
u:r:init:s0 system 361 1 /system/vendor/bin/rfs_access
u:r:kernel:s0 root 362 2 migration/6
u:r:kernel:s0 root 363 2 ksoftirqd/6
u:r:kernel:s0 root 364 2 kworker/6:0
u:r:kernel:s0 root 365 2 kworker/6:0H
u:r:kernel:s0 root 366 2 migration/7
u:r:kernel:s0 root 367 2 ksoftirqd/7
u:r:kernel:s0 root 368 2 kworker/7:0
u:r:kernel:s0 root 369 2 kworker/7:0H
u:r:kernel:s0 root 371 2 kworker/7:2
u:r:kernel:s0 root 376 2 kauditd
u:r:kernel:s0 root 379 2 kworker/2:1H
u:r:kernel:s0 root 385 2 irq/449-wcd9xxx
u:r:kernel:s0 root 386 2 kworker/6:1
u:r:kernel:s0 root 401 2 mdss_fb0
u:r:bootanim:s0 graphics 409 1 /system/bin/bootanimation
u:r:kernel:s0 root 417 2 kworker/4:1H
u:r:kernel:s0 root 418 2 kworker/5:1H
u:r:kernel:s0 root 419 2 kworker/6:1H
u:r:kernel:s0 root 420 2 kworker/7:1H
u:r:shell:s0 shell 421 1 /system/bin/sh
u:r:init:s0 radio 422 1 /system/vendor/bin/qmuxd
u:r:init:s0 root 423 1 /system/vendor/bin/netmgrd
u:r:adbd:s0 shell 426 1 /sbin/adbd
u:r:kernel:s0 root 436 2 ipawq44
u:r:kernel:s0 root 437 2 iparepwq44
u:r:kernel:s0 root 480 2 kworker/u16:2
u:r:kernel:s0 root 481 2 kworker/7:1
u:r:kernel:s0 root 482 2 kworker/4:0
u:r:kernel:s0 root 483 2 kworker/5:0
u:r:kernel:s0 root 484 2 kworker/1:2
u:r:kernel:s0 root 485 2 kworker/0:0
u:r:shell:s0 shell 492 426 ps