This migrates ksud execution decision-making to bprm_check_security.
This requires passing proper argv and envp to a modified _ksud handler
aptly named 'ksu_handle_bprm_ksud'.
Introduces:
int ksu_handle_bprm_ksud(const char *filename, const char *argv1,
const char *envp, size_t envp_len)
which is adapted from:
int ksu_handle_execveat_ksud(int *fd, struct filename **filename_ptr,
struct user_arg_ptr *argv,
struct user_arg_ptr *envp,
int *flags)
ksu_handle_bprm_ksud handles all the decision making, it decides when it is
time to apply_kernelsu_rules depending if it sees "second_stage".
For LSM hook, turns out we can pull out argv and envp from mm_struct.
The code in here explains itself on how to do it.
whole blob exists on arg_start to arg_end, so we just pull it out and grab next
array after the first null terminator.
as for envp, we pass the pointer then hunt for it when needed
My reasoning on adding a fallback on usercopy is that on some devices a fault
happens, and it copies garbled data. On my creation of this, I actually had to lock
that _nofault copy on a spinlock as a way to mimic preempt_disable/enable without
actually doing it. As per user reports, no failed _nofault copies anyway but we
have-to-have a fallback for resilience.
References:
- old version1 6efcd8193e
- old version2 37d5938e66
- bad usercopy #21
This now provides a small helper function, ksu_copy_from_user_retry, which explains
itself. First we attempt a _nofault copy, if that fails, we try plain.
With that, It also provides an inlined copy_from_user_nofault for < 5.8.
While using strncpy_from_user_nofault was considered, this wont do, this will
only copy up to the first \0.
devlog:
16e5dce9e7...16c1f5f52128642e60d7...728de0c571
References:
https://elixir.bootlin.com/linux/v4.14.1/source/include/linux/mm_types.h#L429https://elixir.bootlin.com/linux/v4.14.1/source/include/linux/lsm_hooks.h
Stale: https://github.com/tiann/KernelSU/pull/2653
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
- Introduced a new module `uid_scanner` in userspace for managing UID scanning.
- Created a new GitHub Actions workflow for building the `user_scanner`.
- Implemented kernel communication in `throne_comm.c` and `throne_comm.h` to handle user space updates and rescan requests.
- Developed the `uid_scanner` daemon in C to scan user directories and manage UID whitelists.
- Added configuration management for the UID scanner with support for multiple users and auto-scanning.
- Implemented logging and error handling throughout the UID scanning process.
- Created necessary build files for the `user_scanner` JNI integration.
- Added a `.gitignore` file to exclude build artifacts.
Rethink about this patch, isolated process which directly forks from
zygote is just like normal app, so there is no reason apps won't crash
but Isolated process will. Also zygote reopens fd before actually fork,
so it should be fine.
This reverts commit 2a1741de96a789957555053cf5a397cbef1eb3e4.
* kpm: improving readability
Honestly, this format is really messy
Signed-off-by: Cloud_Yun <1770669041@qq.com>
* kpm: fix missing int label
my bad (((
Signed-off-by: Cloud_Yun <1770669041@qq.com>
---------
Signed-off-by: Cloud_Yun <1770669041@qq.com>
Prioritize retrieving the application UID from /data/user_de. If this fails, fall back to retrieving it from packages.list.
Fix unstable application UID acquisition
Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
The 'strip' function is redundant when checking Kconfig variables, as
values from CONFIG options (like CONFIG_KSU_TRACEPOINT_HOOK) are already
trimmed and do not contain leading/trailing whitespace.
Simplify the condition for better readability and maintainability:
- Remove unnecessary $(strip ...)
- Add consistent spacing around the comma
This change aligns with kernel Makefile conventions and improves code clarity
without altering behavior.
Signed-off-by: dabao1955 <dabao1955@163.com>
- Fixed a panic issue caused by repeated scans in certain cases where dynamic signatures were not enabled
Revert: setup.sh: cleanup symlink & config logic (#338)
- Avoid creating nested symlink (KernelSU/kernel/kernel) when running setup multiple times
- Cleanup in Kconfig only removes the correct line
- Makefile/Kconfig updates only applied once with clearer logs
* Following the advice that was given by member in rksu group, by replacing ALL to untrusted_app.
$ /system/bin/stat /proc/1
Result:
08-15 14:57:54.370 20062 20062 W stat : type=1400 audit(0.0:9564): avc: denied { getattr } for path="/proc/1" dev="proc" ino=12308 scontext=u:r:untrusted_app_27:s0:c27,c258,c512,c768 tcontext=u:r:init:s0 tclass=dir permissive=0 app=com.termux
(issue
438bd5f#commitcomment-163785768)
Test: Checker pass.
* Any issue? Let me know.
Tested-by: rsuntk <rsuntk@yukiprjkt.my.id>
Co-authored-by: rsuntk <rsuntk@yukiprjkt.my.id>
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 https://github.com/backslashxx/KernelSU/issues/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>
Rather than cloning to SukiSU-Ultra and renaming it KernelSU, it would be better to clone it directly as KernelSU.
Signed-off-by: Cloud_Yun <1770669041@qq.com>
reorder ksu_handle_prctl checks a bit to allow non-manager to use CMD 15
this allows us to piggyback a small su to KernelSU's permission system after
disabling kernel sucompat
from:
Relax prctl perm check
- 95125c32f9
Allow prctl only for root or manager or su binary
- fa7af67d94
Refine prctl access check, allow /product/bin/su
- dd466dc1b6
Refine prctl check a little bit more
- e7c5b24efa
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
Co-authored-by: nampud <nampud@users.noreply.github.com>
Use strscpy()/strlcpy() to populate the version buffer in CMD_GET_FULL_VERSION
instead of relying on uninitialized memory. This ensures the returned string
is null-terminated and avoids exposing garbage data to user space.
Signed-off-by: schqiushui <orochi9999@gmail.com>
