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add: KernelSU Next spoofed manager recognition support

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This commit adds support for ReZygiskd to identify which app is the manager in KSUN (KernelSU Next) builds with spoofed manager package name.
This commit is contained in:
ThePedroo
2025-07-01 14:11:39 -03:00
parent 9a3b2f4a79
commit e036b1f40a
1 changed files with 28 additions and 0 deletions
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28
zygiskd/src/root_impl/kernelsu.c
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@@ -20,9 +20,13 @@
#define CMD_UID_GRANTED_ROOT 12
#define CMD_UID_SHOULD_UMOUNT 13
#define CMD_HOOK_MODE 16
#define CMD_GET_MANAGER_UID 17
static enum kernelsu_variants variant = KOfficial;
static uid_t manager_uid = 0;
static bool supports_manager_uid_retrieval = false;
void ksu_get_existence(struct root_impl_state *state) {
int version = 0;
prctl((signed int)KERNEL_SU_OPTION, CMD_GET_VERSION, &version, 0, 0);
@@ -53,6 +57,18 @@ void ksu_get_existence(struct root_impl_state *state) {
else state->variant = KOfficial;
variant = state->variant;
/* INFO: CMD_GET_MANAGER_UID is a KernelSU Next feature, however we won't
limit to KernelSU Next only in case other forks wish to implement
it. */
int reply_ok = 0;
prctl((signed int)KERNEL_SU_OPTION, CMD_GET_MANAGER_UID, 0, 0, &reply_ok);
if (reply_ok == KERNEL_SU_OPTION) {
LOGI("KernelSU implementation supports CMD_GET_MANAGER_UID.\n");
supports_manager_uid_retrieval = true;
}
}
else if (version >= 1 && version <= MIN_KSU_VERSION - 1) state->state = TooOld;
else state->state = Abnormal;
@@ -79,6 +95,18 @@ bool ksu_uid_should_umount(uid_t uid) {
}
bool ksu_uid_is_manager(uid_t uid) {
/* INFO: If the manager UID is set, we can use it to check if the UID
is the manager UID, which is more reliable than checking
the KSU manager data directory, as spoofed builds of
KernelSU Next have different package names.
*/
if (supports_manager_uid_retrieval) {
if (manager_uid == 0)
prctl(KERNEL_SU_OPTION, CMD_GET_MANAGER_UID, &manager_uid, NULL, NULL);
return uid == manager_uid;
}
const char *manager_path = NULL;
if (variant == KOfficial) manager_path = "/data/user_de/0/me.weishu.kernelsu";
else if (variant == KNext) manager_path = "/data/user_de/0/com.rifsxd.ksunext";