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kernel: throne_tracker: harden track_throne_function file read

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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>
This commit is contained in:
backslashxx
2025-06-11 11:47:30 +08:00
committed by Rifat Azad
parent adce657583
commit c108a8ed32
1 changed files with 16 additions and 5 deletions
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21
kernel/throne_tracker.c
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@@ -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);