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Fix multiuser in user independent mode

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This commit is contained in:
topjohnwu 2017-08-12 01:09:02 +08:00
parent 875c687e3f
commit 9be2844c82
2 changed files with 18 additions and 2 deletions
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6
su.h
View File

@ -89,6 +89,12 @@ struct su_user_info {
// the user in android userspace (multiuser) // the user in android userspace (multiuser)
// that invoked this action. // that invoked this action.
unsigned android_user_id; unsigned android_user_id;
// path to superuser directory. this is populated according
// to the multiuser mode.
// this is used to check uid/gid for protecting socket.
// this is used instead of database, as it is more likely
// to exist. db will not exist if su has never launched.
char base_path[PATH_MAX];
// path to su database. this is populated according // path to su database. this is populated according
// to the multiuser mode. // to the multiuser mode.
char database_path[PATH_MAX]; char database_path[PATH_MAX];

14
su_daemon.c
View File

@ -156,9 +156,8 @@ void su_daemon_receiver(int client) {
snprintf(su_ctx->user.database_path, PATH_MAX, "%s/%d/%s", snprintf(su_ctx->user.database_path, PATH_MAX, "%s/%d/%s",
USER_DATA_PATH, su_ctx->user.android_user_id, REQUESTOR_DATABASE_PATH); USER_DATA_PATH, su_ctx->user.android_user_id, REQUESTOR_DATABASE_PATH);
// verify if Magisk Manager is installed // Check main Magisk Manager
xstat(APP_DATA_PATH REQUESTOR, &su_ctx->st); xstat(APP_DATA_PATH REQUESTOR, &su_ctx->st);
// odd perms on superuser data dir
if (su_ctx->st.st_gid != su_ctx->st.st_uid) { if (su_ctx->st.st_gid != su_ctx->st.st_uid) {
LOGE("Bad uid/gid %d/%d for Superuser Requestor application", su_ctx->st.st_uid, su_ctx->st.st_gid); LOGE("Bad uid/gid %d/%d for Superuser Requestor application", su_ctx->st.st_uid, su_ctx->st.st_gid);
info->policy = DENY; info->policy = DENY;
@ -172,6 +171,17 @@ void su_daemon_receiver(int client) {
// Get data from database // Get data from database
database_check(su_ctx); database_check(su_ctx);
if (su_ctx->info->multiuser_mode == MULTIUSER_MODE_USER) {
snprintf(su_ctx->user.base_path, PATH_MAX, "%s/%d/%s",
USER_DATA_PATH, su_ctx->user.android_user_id, REQUESTOR);
// Check the user installed Magisk Manager
xstat(su_ctx->user.base_path, &su_ctx->st);
if (su_ctx->st.st_gid != su_ctx->st.st_uid) {
LOGE("Bad uid/gid %d/%d for Superuser Requestor application", su_ctx->st.st_uid, su_ctx->st.st_gid);
info->policy = DENY;
}
}
// Handle multiuser denies // Handle multiuser denies
if (su_ctx->user.android_user_id && if (su_ctx->user.android_user_id &&
su_ctx->info->multiuser_mode == MULTIUSER_MODE_OWNER_ONLY) { su_ctx->info->multiuser_mode == MULTIUSER_MODE_OWNER_ONLY) {