[SuperSU] BowlesCR:
Hi folks, I'm going nuts here... Haven't been able to get SuperSU installed since updating to Oreo.

Nexus 6P, stock factory OPR6 image, TWRP 3.1.1, SuperSU v2.82-SR3

Flash factory ROM:

C:\Users\xxxx\Downloads\platform-tools>fastboot flash bootloader ..\angler-opr6.170623.013\bootloader-angler-angler-03.73.img
target reported max download size of 494927872 bytes
sending 'bootloader' (3552 KB)...
OKAY [ 0.125s]
writing 'bootloader'...
OKAY [ 0.203s]
finished. total time: 0.328s

C:\Users\xxxx\Downloads\platform-tools>fastboot reboot bootloader
rebooting into bootloader...
OKAY [ 0.031s]
finished. total time: 0.031s

C:\Users\xxxx\Downloads\platform-tools>fastboot flash radio ..\angler-opr6.170623.013\radio-angler-angler-03.84.img
target reported max download size of 494927872 bytes
sending 'radio' (48728 KB)...
OKAY [ 1.172s]
writing 'radio'...
OKAY [ 2.172s]
finished. total time: 3.344s

C:\Users\xxxx\Downloads\platform-tools>fastboot reboot bootloader
rebooting into bootloader...
OKAY [ 0.016s]
finished. total time: 0.016s

C:\Users\xxxx\Downloads\platform-tools>fastboot format system
Creating filesystem with parameters:
Size: 3221225472
Block size: 4096
Blocks per group: 32768
Inodes per group: 8192
Inode size: 256
Journal blocks: 12288
Label:
Blocks: 786432
Block groups: 24
Reserved block group size: 191
Created filesystem with 11/196608 inodes and 25785/786432 blocks
target reported max download size of 494927872 bytes
erasing 'system'...
OKAY [ 0.469s]
sending 'system' (52216 KB)...
OKAY [ 1.266s]
writing 'system'...
OKAY [ 0.734s]
finished. total time: 2.484s

C:\Users\xxxx\Downloads\platform-tools>fastboot update ..\angler-opr6.170623.013\image-angler-opr6.170623.013.zip
target reported max download size of 494927872 bytes
archive does not contain 'boot.sig'
archive does not contain 'recovery.sig'
archive does not contain 'system.sig'
archive does not contain 'vendor.sig'
--------------------------------------------
Bootloader Version...: angler-03.73
Baseband Version.....: angler-03.84
Serial Number........: xxxx
--------------------------------------------
checking product...
OKAY [ 0.031s]
checking version-bootloader...
OKAY [ 0.016s]
checking version-baseband...
OKAY [ 0.016s]
sending 'boot' (12853 KB)...
OKAY [ 0.344s]
writing 'boot'...
OKAY [ 0.194s]
sending 'recovery' (18109 KB)...
OKAY [ 0.438s]
writing 'recovery'...
OKAY [ 0.266s]
erasing 'system'...
OKAY [ 0.094s]
sending sparse 'system' 1/5 (479645 KB)...
OKAY [ 12.703s]
writing 'system' 1/5...
OKAY [ 7.220s]
sending sparse 'system' 2/5 (477841 KB)...
OKAY [ 12.624s]
writing 'system' 2/5...
OKAY [ 6.953s]
sending sparse 'system' 3/5 (466087 KB)...
OKAY [ 12.672s]
writing 'system' 3/5...
OKAY [ 7.828s]
sending sparse 'system' 4/5 (477938 KB)...
OKAY [ 12.526s]
writing 'system' 4/5...
OKAY [ 7.000s]
sending sparse 'system' 5/5 (49108 KB)...
OKAY [ 1.297s]
writing 'system' 5/5...
OKAY [ 0.719s]
sending 'vendor' (187060 KB)...
OKAY [ 4.438s]
writing 'vendor'...
OKAY [ 3.422s]
rebooting...

finished. total time: 90.987s

Boot starts, Enter encryption Pin, finishes booting to home screen. Graceful shutdown.

Power on to bootloader, Recovery, Sad Android... reboot back to bootloader

Flash TWRP:

C:\Users\xxxx\Downloads\platform-tools>fastboot flash recovery ..\twrp-3.1.1-0-angler.img
target reported max download size of 494927872 bytes
sending 'recovery' (16948 KB)...
OKAY [ 0.406s]
writing 'recovery'...
OKAY [ 0.250s]
finished. total time: 0.672s

C:\Users\xxxx\Downloads\platform-tools>fastboot reboot bootloader
rebooting into bootloader...
OKAY [ 0.016s]
finished. total time: 0.031s

Recovery mode, TWRP begins boot, enter encryption pin, twrp finishes boot

Install > SuperSU... Reboot System

Boot starts, Enter encryption Pin, Boot animation for 1hr+

I've tried various combinations of flashing ROM and SuperSU at the same time, with/without a boot in between, with/without clearing cache/dalvik... no joy.

It doesn't appear to be booting far enough for logcat to come up... what other info can I provide to help pin this down?

Edit: Poked around last_log and found this...

----- init.rc -----

Loading from cpio:[init.rc] ...

Finding [setprop selinux.reload_policy]
-!Found

Finding [import ]
-Found@0006 [import /init.environ.rc]

Insert@0012 [import init.supersu.rc]

Append@0706 [# SuperSU:PATCH:282]
Append@0707 [# SuperSU:STOCK:7b771c667b6f0cd0183fcd50d511ed6ec15ab79f]

Saving to cpio:[init.rc] ...

----- done -----

Saving to [/sutmp/ramdisk] ...

- Calling user ramdisk patch script
sukernel v2.82 (ndk:arm64-v8a) - Copyright (C) 2014-2017 - Chainfire & CCMT

Loading from [/sutmp/ramdisk] ...

Saving to [/sutmp/init.environ.rc] ...

sukernel v2.82 (ndk:arm64-v8a) - Copyright (C) 2014-2017 - Chainfire & CCMT

Loading from [/sutmp/ramdisk] ...

Saving to [/sutmp/launch_daemonsu.sh] ...

sukernel v2.82 (ndk:arm64-v8a) - Copyright (C) 2014-2017 - Chainfire & CCMT

Loading from [/sutmp/ramdisk] ...

Creating [init.environ.rc] ...

Loading from [/sutmp/init.environ.rc] ...

Saving to [/sutmp/ramdisk] ...

sukernel v2.82 (ndk:arm64-v8a) - Copyright (C) 2014-2017 - Chainfire & CCMT

Loading from [/sutmp/ramdisk] ...

Creating [sbin/launch_daemonsu.sh] ...

Loading from [/sutmp/launch_daemonsu.sh] ...

Saving to [/sutmp/ramdisk] ...

ln: /su/xbin_bind/supolicy: No such file or directory
- Creating ramdisk backup
sukernel v2.82 (ndk:arm64-v8a) - Copyright (C) 2014-2017 - Chainfire & CCMT

Loading from [/sutmp/ramdisk.original] ...

Loading from [/sutmp/ramdisk] ...

Append@0000 [+ init.supersu.rc]
Append@0001 [+ sbin/launch_daemonsu.sh]
Creating [.subackup] ...

Append@0002 [* fstab.angler 0000_fstab.angler]
Creating [.subackup/0000_fstab.angler] ...

Append@0003 [* init.environ.rc 0001_init.environ.rc]
Creating [.subackup/0001_init.environ.rc] ...

Append@0004 [* init.rc 0002_init.rc]
Creating [.subackup/0002_init.rc] ...

Append@0005 [* plat_property_contexts 0003_plat_property_contexts]
Creating [.subackup/0003_plat_property_contexts] ...

Append@0006 [* sepolicy 0004_sepolicy]
Creating [.subackup/0004_sepolicy] ...

Append@0007 [- verity_key 0005_verity_key]
Creating [.subackup/0005_verity_key] ...

Creating [.subackup/index] ...

Saving to [/sutmp/ramdisk] ...

- Compressing ramdisk (gzip)
sukernel v2.82 (ndk:arm64-v8a) - Copyright (C) 2014-2017 - Chainfire & CCMT

Loading from [/sutmp/ramdisk] ...

Compressing [5225312] --> [2110085]

Saving to [/sutmp/ramdisk.packed] ...

- Creating boot image
sukernel v2.82 (ndk:arm64-v8a) - Copyright (C) 2014-2017 - Chainfire & CCMT

Loading from [/sutmp/boot.img] ...

magic: [ANDROID!]
kernel: [11191460] (11194368) @ 0x00008000
ramdisk: [1958664] (1961984) @ 0x02000000
second: [0] (0) @ 0x00f00000
tags: @ 0x01e00000
page size: 4096
unused: [0x00000000] [0x10000118]
dtb(?): [0] (0)
name: []
command line: [androidboot.hardware=angler androidboot.console=ttyHSL0 msm_rtb.filter=0x37 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 boot_cpus=0-3 no_console_suspend loop.max_part=7 buildvariant=user]
extra command line: []
id: [0x7b30e095bdfa4d1a96c28f4d200fa7c7363fbf2c000000000000000000000000]

Loading from [/sutmp/ramdisk.packed] ...

Saving to [/sutmp/boot.img] ...

magic: [ANDROID!]
kernel: [11191460] (11194368) @ 0x00008000
ramdisk: [2110085] (2113536) @ 0x02000000
second: [0] (0) @ 0x00f00000
tags: @ 0x01e00000
page size: 4096
unused: [0x00000000] [0x10000118]
dtb(?): [0] (0)
name: []
command line: [androidboot.hardware=angler androidboot.console=ttyHSL0 msm_rtb.filter=0x37 ehci-hcd.park=3 lpm_levels.sleep_disabled=1 boot_cpus=0-3 no_console_suspend loop.max_part=7 buildvariant=user]
extra command line: []
id: [0x3a23d90c59f132af72ef678465eee4a542966e56000000000000000000000000]

- Applying hex patches
sukernel v2.82 (ndk:arm64-v8a) - Copyright (C) 2014-2017 - Chainfire & CCMT

Loading from [/tmp/supersu/common/hexpatch] ...

Loading from [/sutmp/boot.img] ...

[replace] [49010054011440B93FA00F71E9000054010840B93FA00F7189000054001840B91FA00F7188010054] [A1020054011440B93FA00F7140020054010840B93FA00F71E0010054001840B91FA00F7181010054]

- Signing boot image
rm: can't remove '/sutmp/avb.img': No such file or directory
- Flashing boot image
dd: writing '/dev/block/mmcblk0p34': No space left on device
8193+0 records in
8192+0 records out
33554432 bytes (32.0MB) copied, 0.211196 seconds, 151.5MB/s
umount: can't umount /su: Invalid argument
Segmentation fault

*************************
IMPORTANT NOTICES
*************************
First reboot may take a
few minutes. It can also
loop a few times. Do not
interrupt the process!
*************************

- Unmounting /system and /vendor
- Done !
I:Updater process ended with RC=0
I:Legacy property environment disabled.
I:Install took 25 second(s).
Updating partition details...
I:Data backup size is 16841MB, free: 60306MB.
I:Unable to mount '/usb-otg'
I:Actual block device: '', current file system: 'vfat'
...done
I:Set page: 'flash_done'
I:operation_end - status=0
I:Set page: 'reboot_system_routine'
I:Set page: 'rebootcheck'
I:Set page: 'appcheck'
Renamed stock recovery file in /system to prevent the stock ROM from replacing TWRP.
I:Copying file /cache/recovery/log to /cache/recovery/last_log
Rebooting...[/hide]

No space left on device... works out to /boot I believe... that and the segfault don't look good.