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31#
发表于 2017-1-21 23:46:18
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#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
asmlinkage int (*real_openat)(int, const char __user*, int);
void **sys_call_table;
int new_openat(int dirfd, const char __user* pathname, int flags)
{
char *kbuf;
size_t len;
kbuf=(char*)kmalloc(256,GFP_KERNEL);
len = strncpy_from_user(kbuf,pathname,255);
if (strcmp(kbuf, "/data/local/tmp/nowyouseeme") == 0) {
printk("Hiding file!\n");
return -ENOENT;
}
kfree(kbuf);
return real_openat(dirfd, pathname, flags);
}
int init_module() {
sys_call_table = (void*)0xc000f984;
real_openat = (void*)(sys_call_table[__NR_openat]);
return 0;
}
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