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kernel: fix selinux when load/save allowlist

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weishu
2022-12-12 13:50:47 +07:00
parent 820d84e512
commit 304581cab4
1 changed files with 23 additions and 15 deletions
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38
kernel/allowlist.c
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@@ -41,6 +41,15 @@ static struct work_struct ksu_load_work;
bool persistent_allow_list(void);
struct file *permissive_filp_open(const char * path, int flags, umode_t mode) {
struct file* fp;
// fixme: u:r:kernel:s0 don't have permission to write /data/adb...
setenforce(false);
fp = filp_open(path, flags, mode);
setenforce(true);
return fp;
}
bool ksu_allow_uid(uid_t uid, bool allow) {
// find the node first!
@@ -113,10 +122,7 @@ void do_persistent_allow_list(struct work_struct *work) {
struct list_head *pos = NULL;
loff_t off = 0;
// fixme: u:r:kernel:s0 don't have permission to write /data/adb...
setenforce(0);
struct file *fp = filp_open(KERNEL_SU_ALLOWLIST, O_WRONLY | O_CREAT, 0644);
setenforce(1);
struct file *fp = permissive_filp_open(KERNEL_SU_ALLOWLIST, O_WRONLY | O_CREAT, 0644);
if (IS_ERR(fp)) {
pr_err("save_allow_list creat file failed: %d\n", PTR_ERR(fp));
@@ -156,17 +162,22 @@ void do_load_allow_list(struct work_struct *work) {
fp = filp_open("/data/adb/", O_RDONLY, 0);
if (IS_ERR(fp)) {
int errno = PTR_ERR(fp);
pr_err("load_allow_list open '/data/adb' failed: %d\n", PTR_ERR(fp));
// we cannot use mdelay, it cause bootloop.
msleep(2000);
queue_work(ksu_workqueue, &ksu_load_work);
return;
if (errno == -ENOENT) {
msleep(2000);
queue_work(ksu_workqueue, &ksu_load_work);
return;
} else {
pr_info("load_allow list dir exist now!");
}
} else {
filp_close(fp, 0);
}
filp_close(fp, 0);
#if 1
// load allowlist now!
fp = filp_open(KERNEL_SU_ALLOWLIST, O_RDONLY, 0);
fp = permissive_filp_open(KERNEL_SU_ALLOWLIST, O_RDONLY, 0);
if (IS_ERR(fp)) {
pr_err("load_allow_list open file failed: %d\n", PTR_ERR(fp));
@@ -189,10 +200,6 @@ void do_load_allow_list(struct work_struct *work) {
while (true) {
u32 uid;
bool allow = false;
if (n++ > 10) {
pr_info("load_allow_list n: %d\n", n);
break;
}
ret = kernel_read(fp, &uid, sizeof(uid), &off);
if (ret <= 0) {
pr_info("load_allow_list read err: %d\n", ret);
@@ -208,6 +215,7 @@ void do_load_allow_list(struct work_struct *work) {
exit:
filp_close(fp, 0);
#endif
}
static int init_work(void) {