From c108a8ed326077b45ff18492bd15e2d3e38c4aec Mon Sep 17 00:00:00 2001
From: backslashxx <118538522+backslashxx@users.noreply.github.com>
Date: Wed, 11 Jun 2025 11:47:30 +0800
Subject: [PATCH] kernel: throne_tracker: harden track_throne_function file
 read

this probably wont happen, but just to make sure, we dont block the rename now
so there is really a chance that this does not exist yet when the kthread runs.

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
---
 kernel/throne_tracker.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/kernel/throne_tracker.c b/kernel/throne_tracker.c
index d83f2d88..547b6a20 100644
--- a/kernel/throne_tracker.c
+++ b/kernel/throne_tracker.c
@@ -305,13 +305,24 @@ static bool is_uid_exist(uid_t uid, char *package, void *data)
 
 void track_throne()
 {
-	struct file *fp =
-		ksu_filp_open_compat(SYSTEM_PACKAGES_LIST_PATH, O_RDONLY, 0);
+	struct file *fp;
+	int tries = 0;
+
+	while (tries++ < 10) {
+		fp = ksu_filp_open_compat(SYSTEM_PACKAGES_LIST_PATH, O_RDONLY, 0);
+		if (!IS_ERR(fp)) // success, file exists
+			break;
+
+		pr_info("%s: waiting for %s\n", __func__, SYSTEM_PACKAGES_LIST_PATH);
+		schedule(); // maybe enough, otherwise, add delay?
+		msleep(100); // migth as well add a delay
+	};
+	
 	if (IS_ERR(fp)) {
-		pr_err("%s: open " SYSTEM_PACKAGES_LIST_PATH " failed: %ld\n",
-		       __func__, PTR_ERR(fp));
+		pr_err("%s: open " SYSTEM_PACKAGES_LIST_PATH " failed: %ld\n", __func__, PTR_ERR(fp));
 		return;
-	}
+	} else
+		pr_info("%s: %s found!\n", __func__, SYSTEM_PACKAGES_LIST_PATH);
 
 	struct list_head uid_list;
 	INIT_LIST_HEAD(&uid_list);