static int run_acl(unsigned long ino) {
struct acl_entry *entry;
- hlist_for_each_entry_rcu(entry,
+ hlist_for_each_entry_rcu_notrace(entry,
&procprotect_hash[ino & (HASH_SIZE-1)],
hlist) {
if (entry->ino==ino) {
.data_size = sizeof(struct procprotect_ctx)
};
+int once_only = 0;
+
+static int init_probes(void) {
+ int ret;
+ dolast_probe.kp.addr =
+ (kprobe_opcode_t *) kallsyms_lookup_name("do_last");
+
+ if (!dolast_probe.kp.addr) {
+ printk("Couldn't find %s to plant kretprobe\n", "do_last");
+ return -1;
+ }
+
+ if ((ret = register_jprobe(&dolast_probe)) <0) {
+ printk("register_jprobe failed, returned %u\n", ret);
+ return -1;
+ }
+ fast_probe.kp.addr =
+ (kprobe_opcode_t *) kallsyms_lookup_name("lookup_fast");
+
+ if (!fast_probe.kp.addr) {
+ printk("Couldn't find %s to plant kretprobe\n", "lookup_fast");
+ return -1;
+ }
+
+ slow_probe.kp.addr =
+ (kprobe_opcode_t *) kallsyms_lookup_name("lookup_slow");
+
+ if (!slow_probe.kp.addr) {
+ printk("Couldn't find %s to plant kretprobe\n", "lookup_slow");
+ return -1;
+ }
+
+ if ((ret = register_kretprobe(&fast_probe)) <0) {
+ printk("register_kretprobe failed, returned %d\n", ret);
+ return -1;
+ }
+
+ printk("Planted kretprobe at %p, handler addr %p\n",
+ fast_probe.kp.addr, fast_probe.handler);
+
+ if ((ret = register_kretprobe(&slow_probe)) <0) {
+ printk("register_kretprobe failed, returned %d\n", ret);
+ return -1;
+ }
+ printk("Planted kretprobe at %p, handler addr %p\n",
+ slow_probe.kp.addr, slow_probe.handler);
+ return 0;
+}
+
static void add_entry(char *pathname) {
struct path path;
if (kern_path(pathname, 0, &path)) {
}
}
}
+
}
pathname[count]='\0';
add_entry(pathname);
+
+ if (!once_only) {
+ once_only=1;
+ if (init_probes()==-1)
+ printk(KERN_CRIT "Could not install procprotect probes. Reload module to retry.");
+ }
printk(KERN_CRIT "Length of buffer=%d",strlen(pathname));
return count;
}
.write = procfile_write
};
+
static int __init procprotect_init(void)
{
int ret;
aclqpath.name = aclpath;
aclqpath.len = strnlen(aclpath, PATH_MAX);
- dolast_probe.kp.addr =
- (kprobe_opcode_t *) kallsyms_lookup_name("do_last");
-
- if (!dolast_probe.kp.addr) {
- printk("Couldn't find %s to plant kretprobe\n", "do_last");
- return -1;
- }
-
- if ((ret = register_jprobe(&dolast_probe)) <0) {
- printk("register_jprobe failed, returned %u\n", ret);
- return -1;
- }
- fast_probe.kp.addr =
- (kprobe_opcode_t *) kallsyms_lookup_name("lookup_fast");
-
- if (!fast_probe.kp.addr) {
- printk("Couldn't find %s to plant kretprobe\n", "lookup_fast");
- return -1;
- }
-
- slow_probe.kp.addr =
- (kprobe_opcode_t *) kallsyms_lookup_name("lookup_slow");
-
- if (!slow_probe.kp.addr) {
- printk("Couldn't find %s to plant kretprobe\n", "lookup_slow");
- return -1;
- }
-
-
-
- if ((ret = register_kretprobe(&fast_probe)) <0) {
- printk("register_kretprobe failed, returned %d\n", ret);
- return -1;
- }
-
- printk("Planted kretprobe at %p, handler addr %p\n",
- fast_probe.kp.addr, fast_probe.handler);
-
- if ((ret = register_kretprobe(&slow_probe)) <0) {
- printk("register_kretprobe failed, returned %d\n", ret);
- return -1;
- }
- printk("Planted kretprobe at %p, handler addr %p\n",
- slow_probe.kp.addr, slow_probe.handler);
-
proc_entry = proc_create("procprotect", 0644, NULL, &procprotect_fops);
- add_entry("/proc/sysrq-trigger");
return ret;
}