static int notifier_chain_register(struct notifier_block **nl,
struct notifier_block *n)
{
- if (!kernel_text_address((unsigned long)n->notifier_call)) {
- WARN(1, "Invalid notifier registered!");
- return 0;
- }
while ((*nl) != NULL) {
if (n->priority > (*nl)->priority)
break;
static int notifier_chain_cond_register(struct notifier_block **nl,
struct notifier_block *n)
{
- if (!kernel_text_address((unsigned long)n->notifier_call)) {
- WARN(1, "Invalid notifier registered!");
- return 0;
- }
while ((*nl) != NULL) {
if ((*nl) == n)
return 0;
int ret = NOTIFY_DONE;
struct notifier_block *nb, *next_nb;
- nb = rcu_dereference(*nl);
+ nb = rcu_dereference_raw(*nl);
while (nb && nr_to_call) {
- next_nb = rcu_dereference(nb->next);
+ next_nb = rcu_dereference_raw(nb->next);
#ifdef CONFIG_DEBUG_NOTIFIERS
- if (!kernel_text_address((unsigned long)nb->notifier_call)) {
+ if (unlikely(!func_ptr_is_kernel_text(nb->notifier_call))) {
WARN(1, "Invalid notifier called!");
nb = next_nb;
continue;
* racy then it does not matter what the result of the test
* is, we re-check the list after having taken the lock anyway:
*/
- if (rcu_dereference(nh->head)) {
+ if (rcu_dereference_raw(nh->head)) {
down_read(&nh->rwsem);
ret = notifier_call_chain(&nh->head, val, v, nr_to_call,
nr_calls);
static ATOMIC_NOTIFIER_HEAD(die_chain);
-int notify_die(enum die_val val, const char *str,
+int notrace __kprobes notify_die(enum die_val val, const char *str,
struct pt_regs *regs, long err, int trap, int sig)
{
struct die_args args = {