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kernel: precise trigger timing of post-fs-data (#118)

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* kernel: add report_event cmd

* ksud: report event

* kernel: trigger on_post_fs_data

* ksud: comment unused code

* [skip ci] run clang-format

Signed-off-by: Ylarod <me@ylarod.cn>

* ci: use custom key to sign official bootimgs

* format ksud

* reject non root

* remove

Signed-off-by: Ylarod <me@ylarod.cn>
This commit is contained in:
Ylarod
2023-01-26 11:29:02 +08:00
committed by GitHub
parent 22b66b6672
commit db600d5ea0
19 changed files with 170 additions and 37 deletions
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32
kernel/core_hook.c
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@@ -4,6 +4,7 @@
#include "linux/kernel.h"
#include "linux/kprobes.h"
#include "linux/lsm_hooks.h"
#include "linux/printk.h"
#include "linux/uaccess.h"
#include "linux/uidgid.h"
#include "linux/version.h"
@@ -15,11 +16,12 @@
#include "allowlist.h"
#include "arch.h"
#include "core_hook.h"
#include "klog.h" // IWYU pragma: keep
#include "ksu.h"
#include "ksud.h"
#include "manager.h"
#include "selinux/selinux.h"
#include "uid_observer.h"
#include "klog.h" // IWYU pragma: keep
static inline bool is_allow_su()
{
@@ -200,6 +202,34 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
}
}
if (arg2 == CMD_REPORT_EVENT) {
if (0 != current_uid().val) {
return 0;
}
switch (arg3) {
case EVENT_POST_FS_DATA: {
static bool post_fs_data_lock = false;
if (!post_fs_data_lock) {
post_fs_data_lock = true;
pr_info("post-fs-data triggered");
on_post_fs_data();
}
break;
}
case EVENT_BOOT_COMPLETED: {
static bool boot_complete_lock = false;
if (!boot_complete_lock) {
boot_complete_lock = true;
pr_info("boot_complete triggered");
}
break;
}
default:
break;
}
return 0;
}
// all other cmds are for 'root manager'
if (!is_manager()) {
pr_info("Only manager can do cmd: %d\n", arg2);