This idea is borrowed from simonpunk's susfs4ksu.
What we see here is that, yeah well, lets just have userspace send us
what it
wants unmounted, this is better than hardcoding everything.
This also solves that issue where MNT_DETACH fails, as long as we send
unmountables in proper order.
A small anti-duplicate mechanism is also added.
While in-kernel umount is a bit worse than zygisk-provider-based ones,
this can still
serve as a healthy alternative.
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- Remove duplicate checks
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
Co-authored-by: weishu <twsxtd@gmail.com>
Co-authored-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
There are many fd related functions that can sleep, so we have no choice
but move operations to task work. Also close fd when copy_to_user fails.
Co-authored-by: Wang Han <416810799@qq.com>
1) Fix memory leak of callback head in allowlist.c
2) Remove duplicated logic and incorrect log in kernel_umount.c
3) Prevent sleep in kprobe context in ksud.c
4) Remove useless is_unsupported_uid, use euid for security enhance,
add FIXME in setuid_hook.c
5) Remove useless fd argument for execve hook, fix incorrent pointer
usage in syscall_hook_manager.c and sucompat.c
6) Use correct errno in supercalls.c
---------
Co-authored-by: Ylarod <me@ylarod.cn>
* use sys_enter tracepoint for sucompat
* update sucompat rules
* clean tif mark
* mark tif after load allow list
* clear all tif first, then mark target
* Fix shell su
* allow when escape
* fix bugs
* kernel: Resolve logical inconsistencies
---------
Co-authored-by: Ylarod <me@ylarod.cn>
Co-authored-by: weishu <twsxtd@gmail.com>
* Revert "feat: try manual reboot hook (#521)"
This reverts commit 1853d9decf.
* kernel: core_hook: provide a better reboot handler
I propose that you pass cmd and arg as reference.
this is so we can have much more extendable use of that pointer
kernel: core_hook: provide sys_reboot handler
- 2e2727d56c
kernel: kp_ksud: add sys_reboot kp hook
- 03285886b0
I'm proposing passing arg as reference to arg pointer and also pass int cmd
we can use it to pass numbers atleast.
for advanced usage, we can use it as a delimiter so we can pass a pointer to array.
example pass a char *array[] which decays to a char ** and then use cmd as the number of array members.
we can pass the pointer of the first member of the array and use cmd as the delimiter (count) of members.
for simpler usecase, heres some that I added.
kernel: core_hook: expose umount list on sys_reboot interface
- 352de41e4b
kernel: core_hook: expose nuke_ext4_sysfs to sys_reboot interface
- 83fc684ccb
ksud: add cmd for add-try-umount, wipe-umount-list and nuke-ext4-sysfs
- a4eab4b8c3
more usage demos
https://github.com/backslashxx/lkm_template/tree/write-pointer-on-pointerhttps://github.com/backslashxx/lkm_template/tree/pointer-reuse
I actually proposed sys_reboot upstream because of this pointer that is very usable.
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
---------
Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
* refactor: replace throne tracker with ksud token
* use snprintf
* refactor: new supercall impl
- Import the sukisu command
* disable seccomp for supercall users
* kernel: fmt clear
* kernel: Enable macro protection for sulog
- Only enabled on kernel versions greater than 5.10.245
* kernel: Refactor kprobe hooks and implement LSM hooks for improved security handling
* debug mode
* kernel: Add functionality to generate and validate authentication tokens for cmd_su
* kernel: Simplified manual SU command processing for code
* kernel: replace renameat hook with fsnotify
* Revert "refactor: replace throne tracker with ksud token"
This reverts commit aa2cbbf.
* kernel: fix compile
* kernel: fix compile below 6.0
* Fix compile err; Add become_manager
* kernel: install fd for manager automaticlly
- extend to import the corresponding command
* manager: new supercall impl
* temp changes for ksud
* ksud: fix compile
* fix wrong opcode
* kernel: fix compile
* kernel: Fixed hook type and KPM status retrieval errors
* kernel: Fixed potential null pointer issue with current->mm in kernel version 5.10
When calling get_full_comm() within system call hooks, current->mm may be null (prctl). A fallback mechanism for current->comm must be added beforehand to prevent null pointer dereferences when accessing mm->arg_start/arg_end.
Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
* ksud: fix cargo check
* manager: Fixed an issue where the KSUD release and user-mode scanning switch failed to function correctly.
- kernel: fix spin lock mutual
kernel: Fixed potential null pointer issue with current->mm in kernel version 5.10
When calling get_full_comm() within system call hooks, current->mm may be null (prctl). A fallback mechanism for current->comm must be added beforehand to prevent null pointer dereferences when accessing mm->arg_start/arg_end.
kernel: try introduce like susfs's method to fix prctl delay
* seccomp: allow reboot
* use u32
* update clang-format
* 4 spaces save the world
* ksud: Fix build on macOS
* manager: bump minimal supported kernel.
- When get_hook_type is empty, display “Unknown”.
* Fix ksud build (#2841)
* try fix ksud
* fix for macos
* remove any
* Fix ksud build, take 3
* try fix allowlist
* bring lsm hook back
* fix: a lot again
* Fix ksud build, take 4 (#2846)
Remove init_driver_fd function for non-linux/android targets
* manager: Return to the native method via KSUd installation
* Merge with susfs-mian format
---------
Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
Co-authored-by: Ylarod <me@ylarod.cn>
Co-authored-by: weishu <twsxtd@gmail.com>
Co-authored-by: AlexLiuDev233 <wzylin11@outlook.com>
Co-authored-by: Wang Han <416810799@qq.com>
