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kernel: allow root processes to get allow/deny list (#256)

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Nullptr
2023-02-19 16:09:21 +08:00
committed by GitHub
parent 3f1ee2f784
commit a161c318a1
1 changed files with 23 additions and 19 deletions
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42
kernel/core_hook.c
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@@ -253,6 +253,29 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
return 0;
}
if (arg2 == CMD_GET_ALLOW_LIST || arg2 == CMD_GET_DENY_LIST) {
if (is_manager() || 0 == current_uid().val) {
u32 array[128];
u32 array_length;
bool success = ksu_get_allow_list(array, &array_length,
arg2 == CMD_GET_ALLOW_LIST);
if (success) {
if (!copy_to_user(arg4, &array_length,
sizeof(array_length)) &&
!copy_to_user(arg3, array,
sizeof(u32) * array_length)) {
if (copy_to_user(result, &reply_ok,
sizeof(reply_ok))) {
pr_err("prctl reply error, cmd: %d\n",
arg2);
}
} else {
pr_err("prctl copy allowlist error\n");
}
}
}
}
// all other cmds are for 'root manager'
if (!is_manager()) {
pr_info("Only manager can do cmd: %d\n", arg2);
@@ -271,25 +294,6 @@ int ksu_handle_prctl(int option, unsigned long arg2, unsigned long arg3,
}
}
ksu_show_allow_list();
} else if (arg2 == CMD_GET_ALLOW_LIST || arg2 == CMD_GET_DENY_LIST) {
u32 array[128];
u32 array_length;
bool success = ksu_get_allow_list(array, &array_length,
arg2 == CMD_GET_ALLOW_LIST);
if (success) {
if (!copy_to_user(arg4, &array_length,
sizeof(array_length)) &&
!copy_to_user(arg3, array,
sizeof(u32) * array_length)) {
if (copy_to_user(result, &reply_ok,
sizeof(reply_ok))) {
pr_err("prctl reply error, cmd: %d\n",
arg2);
}
} else {
pr_err("prctl copy allowlist error\n");
}
}
}
return 0;