Run throne_tracker() in kthread instead of blocking the caller.
Prevents full lockup during installation and removing the manager.
By default, first run remains synchronous for compatibility purposes
(FDE, FBEv1, FBEv2)
Features:
- looks and waits for manager UID in /data/system/packages.list
- run track_throne() in a kthread after the first synchronous run
- prevent duplicate thread creation with a single-instance check
- spinlock-on-d_lock based polling adressing possible race conditions.
Race conditions adressed
- single instance kthread lock, smp_mb()
- track_throne_function, packages.list, spinlock-on-d_lock based polling
- is_manager_apk, apk, spinlock-on-d_lock based polling
This is a squash of:
https://github.com/tiann/KernelSU/pull/2632
Original skeleton based on:
`kernelsu: move throne_tracker() to kthread`
`kernelsu: check locking before accessing files and dirs during searching manager`
`kernelsu: look for manager UID in /data/system/packages.list, not /data/system/packages.list.tmp`
0b05e927...8783badd
Co-Authored-By: backslashxx <118538522+backslashxx@users.noreply.github.com>
Co-Authored-By: Yaroslav Zviezda <10716792+acroreiser@users.noreply.github.com>
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
Tracepoint is a predefined hook point in the kernel, compared to Kprobe,
it is more stable and has lower performance overhead, although compatibility
is relatively poor, it is still worth trying
By the way, we have also included the config definitions related to hook types
in Kconfig, to enhance cleanliness
Improve and merge types that do not require hooks
Introducing the hook type prctl
These patches is based on backslashxx/KernelSU#5
Co-authored-by: Cloud_Yun <1770669041@qq.com>
Co-authored-by: Prslc <prslc113@gmail.com>
Co-authored-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
- We don't know if KPM can run on arm32-bit devices, so to avoid some problems, add a dependency on 64-bit architectures
kernel/throne_tracker: we just uninstalled the manager, stop looking for it
When the manager UID disappears from packages.list, we correctly
invalidate it — good. But, in the very next breath, we start scanning
/data/app hoping to find it again?
Skip the scan — we’ll catch the reinstall next time packages.list updates.
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
disabling this removes the need for LSM_HOOK_INIT, security_add_hooks and such,.
furthermore, this will also allow easier integration on pre-4.1 kernels.
Expose this and make it a configurable option.
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
1. List KSU as a "KernelSU" menu
2. Overlayfs[1] may be disabled for some early kernels(4.4.y), so
choosing depends on OVERLAY_FS here is useless.
3. KSU_DEBUG is a bool option, it is not a module, fixed from tristate
to bool.
4. Adjust the config order
[1]: github.com/LineageOS/android_kernel_xiaomi_msm8998/commit/dcc27641
Change-Id: I49c77ba30f0a8ed00efc44afef8a12f9ad039d7e
Co-authored-by: admin <paper@localhost>
For those who want to Implement KernelSU Manually with KPROBES disabled.
When KPROBES Broken and Still enabled, this will causing Loop at splash
logo even Already Manually Imported because this
842c0b674f/kernel/ksu.c (L57).
And when KPROBES is disabled, KSU also will not compiled (I Know it'll
still build if obj-y is set for KSU, but it's better to remove, who
knows if someone set as obj-$(CONFIG_KSU)).
Signed-off-by: RyuujiX <saputradenny712@gmail.com>
* Kconfig: add KSU_DEBUG
* print alert on debug mode
* allow shell by default
* store signature to var on debug mode
* format
* export as module_param
* rename apk_sign to kernelsu
