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backslashxx 27d8bc458f kernel: sucompat: increase reliability of execve_sucompat

On plain ARMv8.0 devices (A53,A57,A73), strncpy_from_user_nofault() sometimes
fails to copy `filename_user` string correctly. This breaks su ofc, breaking
some apps like Termux (Play Store ver), ZArchiver and Root Explorer.

This does NOT seem to affect newer ARMv8.2+ CPUs (A75/A76 and newer)

My speculation? ARMv8.0 has weak speculation :)

here we replace `strncpy_from_user_nofault()` with another routine:
 - access_ok() to validate the pointer
 - strncpy_from_user() to copy and validate string
 - manual null-termination just in case, as strncpy_from_user_nofault also does it
 - remove that memset, seems useless as it is an strncpy, not strncat

Kind of mimicking _nofault, but yes with this one we allow pagefaults.

Tested on:
- ARMv8.0 A73.a53, A57.a53, A53.a53
- ARMv8.2 A76.a55

Tested-by: iDead XD <rafifirdaus12bb@gmail.com>
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

2025-05-21 15:01:01 +06:00

.github

ci: Only have one task for susfsd irrespective of the target architecture (#395 )

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Fixes for Russian translation (#358 )

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kernel: sucompat: increase reliability of execve_sucompat

2025-05-21 15:01:01 +06:00

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manager: refactor label item in superuser list (#403 )

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SECURITY.md

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docs/README.md

KernelSU Next

A kernel-based root solution for Android devices.

Features

Kernel-based su and root access management.
Module system based on dynamic mount system Magic Mount / OverlayFS.
App Profile: Lock up the root power in a cage.

Compatibility state

KernelSU Next officially supports most Android kernels starting from 4.4 up to 6.6.

GKI 2.0 (5.10+) kernels can run pre-built images and LKM/KMI.
GKI 1.0 (4.19 - 5.4) kernels need to rebuilt with KernelSU driver.
EOL (<4.14) kernels also need to be rebuilt with KernelSU driver (3.18+ is experimental and may need some function backports).

Currently, only the arm64-v8a architecture is supported.

Usage

Installation instruction

Security

For information on reporting security vulnerabilities in KernelSU, see SECURITY.md.

License

Files under the kernel directory are GPL-2.0-only.
All other parts except the kernel directory are GPL-3.0-or-later.

Donations

0x12b5224b7aca0121c2f003240a901e1d064371c1 [ USDT BEP20 ]
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0x12b5224b7aca0121c2f003240a901e1d064371c1 [ USDT ERC20 ]
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19QgifcjMjSr1wB2DJcea5cxitvWVcXMT6 [ BTC ]

Credits

Kernel-Assisted Superuser: The KernelSU idea.
Magisk: The powerful root tool.
genuine: APK v2 signature validation.
Diamorphine: Some rootkit skills.
KernelSU: Thanks to tiann, or else KernelSU Next wouldn't even exist.
Magic Mount Port: 💜 5ec1cff for saving KernelSU!

Releases 1

v1.0.8 Latest

2025-06-16 00:00:17 +00:00

Languages

Kotlin 44%

Rust 29.4%

C 16.5%

Java 4.4%

Shell 2.9%

Other 2.7%