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final (hopefully) fixes

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This commit is contained in:
Sebastian Moser
2024-08-16 15:49:38 +02:00
parent 349b792c18
commit 748b7e4aa1
3 changed files with 28 additions and 11 deletions
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31
scripts/yt-block/unkillable.c
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@@ -25,6 +25,25 @@ struct file_operations unkillable_fops = {
int unkillable_major = 117;
void make_unkillable(int pid) {
struct pid *pid_struct;
struct task_struct *p;
pr_info("ok ... pid in fn: %d \n", pid);
/* get the pid struct */
pid_struct = find_get_pid((int) pid);
/* get the task_struct from the pid */
p = pid_task(pid_struct, PIDTYPE_PID);
/* add the flag */
p->signal->flags = p->signal->flags | SIGNAL_UNKILLABLE;
printk("Unkillable: pid %d marked as unkillable\n", (int) pid);
}
int unkillable_init(void)
{
if (register_chrdev(unkillable_major, "unkillable", &unkillable_fops) < 0 ) {
@@ -54,21 +73,12 @@ int unkillable_release(struct inode *inode, struct file *filp)
ssize_t unkillable_read(struct file *filp, char *buf, size_t count, loff_t *f_pos)
{
struct pid *pid_struct;
struct task_struct *p;
/* interpret count to read as target pid */
printk("Unkillable: Got pid %d", (int) count);
/* get the pid struct */
pid_struct = find_get_pid((int) count);
make_unkillable(count);
/* get the task_struct from the pid */
p = pid_task(pid_struct, PIDTYPE_PID);
/* add the flag */
p->signal->flags = p->signal->flags | SIGNAL_UNKILLABLE;
printk("Unkillable: pid %d marked as unkillable\n", (int) count);
if (*f_pos == 0) {
*f_pos+=1;
@@ -91,6 +101,7 @@ ssize_t unkillable_write(struct file *filp, const char *buf, size_t count, loff_
return ret;
} else {
pr_info("ok ... pid: %llu\n", res);
make_unkillable( (int) res);
return count;
}
}