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Kernel: Implement sulog for enhanced logging of SU attempts and permissions

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This commit is contained in:
ShirkNeko
2025-10-22 17:21:25 +08:00
parent b5e5be2572
commit 3b966c536b
7 changed files with 484 additions and 3 deletions
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14
kernel/sucompat.c
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@@ -16,6 +16,7 @@
#include "klog.h" // IWYU pragma: keep
#include "ksud.h"
#include "kernel_compat.h"
#include "sulog.h"
#define SU_PATH "/system/bin/su"
#define SH_PATH "/system/bin/sh"
@@ -133,6 +134,8 @@ int ksu_handle_execveat_sucompat(int *fd, struct filename **filename_ptr,
int *__never_use_flags)
{
struct filename *filename;
uid_t current_uid_val = current_uid().val;
bool is_allowed = ksu_is_allow_uid(current_uid_val);
const char sh[] = KSUD_PATH;
const char su[] = SU_PATH;
@@ -152,8 +155,11 @@ int ksu_handle_execveat_sucompat(int *fd, struct filename **filename_ptr,
if (likely(memcmp(filename->name, su, sizeof(su))))
return 0;
if (!ksu_is_allow_uid(current_uid().val))
ksu_sulog_report_su_attempt(current_uid_val, NULL, filename->name, is_allowed);
if (!is_allowed) {
return 0;
}
pr_info("do_execveat_common su found\n");
memcpy((void *)filename->name, sh, sizeof(sh));
@@ -167,6 +173,8 @@ int ksu_handle_execve_sucompat(int *fd, const char __user **filename_user,
void *__never_use_argv, void *__never_use_envp,
int *__never_use_flags)
{
uid_t current_uid_val = current_uid().val;
bool is_allowed = ksu_is_allow_uid(current_uid_val);
const char su[] = SU_PATH;
char path[sizeof(su) + 1];
@@ -183,8 +191,10 @@ int ksu_handle_execve_sucompat(int *fd, const char __user **filename_user,
if (likely(memcmp(path, su, sizeof(su))))
return 0;
ksu_sulog_report_su_attempt(current_uid_val, NULL, path, is_allowed);
if (!ksu_is_allow_uid(current_uid().val))
if (!is_allowed)
return 0;
pr_info("sys_execve su found\n");