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Skip svc for ro properties

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ro properties' triggers should only be triggered once, otherwise it
may undefined behaviour.
This patch avoids triggering ro properties' actions again when using
resetprop to modify them.

Co-authored-by: 5ec1cff <ewtqyqyewtqyqy@gmail.com>
This commit is contained in:
LoveSy 2023-12-17 03:12:08 +08:00 committed by topjohnwu
parent a003336497
commit f41994cb52
3 changed files with 16 additions and 12 deletions
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4
native/src/core/module.cpp
View File

@ -313,12 +313,12 @@ void load_modules() {
native_bridge_orig = "0";
}
native_bridge = native_bridge_orig != "0" ? ZYGISKLDR + native_bridge_orig : ZYGISKLDR;
set_prop(NBPROP, native_bridge.data(), true);
set_prop(NBPROP, native_bridge.data());
// Weather Huawei's Maple compiler is enabled.
// If so, system server will be created by a special Zygote which ignores the native bridge
// and make system server out of our control. Avoid it by disabling.
if (get_prop("ro.maple.enable") == "1") {
set_prop("ro.maple.enable", "0", true);
set_prop("ro.maple.enable", "0");
}
inject_zygisk_libs(system);
}

20
native/src/core/resetprop/resetprop.cpp
View File

@ -9,6 +9,7 @@
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <api/_system_properties.h>
#include <system_properties/prop_info.h>
using namespace std;
@ -134,18 +135,21 @@ static int set_prop(const char *name, const char *value, PropFlags flags) {
if (!check_legal_property_name(name))
return 1;
const char *msg = flags.isSkipSvc() ? "direct modification" : "property_service";
auto pi = const_cast<prop_info *>(__system_property_find(name));
// Always delete existing read-only properties, because they could be
// long properties and cannot directly go through __system_property_update
if (pi != nullptr && str_starts(name, "ro.")) {
// Skip pruning nodes as we will add it back ASAP
__system_property_delete(name, false);
pi = nullptr;
// Delete existing read-only properties if they are or will be long properties,
// which cannot directly go through __system_property_update
if (str_starts(name, "ro.")) {
if (pi != nullptr && (pi->is_long() || strlen(value) >= PROP_VALUE_MAX)) {
// Skip pruning nodes as we will add it back ASAP
__system_property_delete(name, false);
pi = nullptr;
}
flags.setSkipSvc();
}
const char *msg = flags.isSkipSvc() ? "direct modification" : "property_service";
int ret;
if (pi != nullptr) {
if (flags.isSkipSvc()) {

4
native/src/core/zygisk/entry.cpp
View File

@ -245,8 +245,8 @@ void reset_zygisk(bool restore) {
if (native_bridge.length() > strlen(ZYGISKLDR)) {
native_bridge_orig = native_bridge.substr(strlen(ZYGISKLDR));
}
set_prop(NBPROP, native_bridge_orig.data(), true);
set_prop(NBPROP, native_bridge_orig.data());
} else {
set_prop(NBPROP, native_bridge.data(), true);
set_prop(NBPROP, native_bridge.data());
}
}