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fmayer/gist:8900b52636574ee079fa1943e5da918e Secret

Last active June 23, 2022 21:16
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gistfile1.txt
# Device bootloader does not support memtag, so it leaves it alone on normal
# boots.
$ adb shell su root setenforce 0
$ adb shell su root /data/local/tmp/mtectrl memtag-once
$ adb shell su root dd bs=1 skip=32768 if=/dev/block/bootdevice/by-name/misc count=32768 | xxd
[...]
00000040: 015a fefe 5a02 0000 0000 0000 0000 0000 .Z..Z...........
[...]
[[ FACTORY RESET IN RECOVERY ]]
$ adb shell su root dd bs=1 skip=32768 if=/dev/block/bootdevice/by-name/misc count=32768 | xxd
00000040: 0000 0000 0000 0000 0000 0000 0000 0000 ................
$ adb shell su root /data/local/tmp/mtectrl memtag-once
$ adb shell su root dd bs=1 skip=32768 if=/dev/block/bootdevice/by-name/misc count=32768 | xxd
[...]
00000040: 015a fefe 5a02 0000 0000 0000 0000 0000 .Z..Z...........
[...]
[[ FACTORY RESET IN SETTINGS ]]
$ adb shell su root dd bs=1 skip=32768 if=/dev/block/bootdevice/by-name/misc count=32768 | xxd
[...]
00000040: 0000 0000 0000 0000 0000 0000 0000 0000 ................
[...]
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