static void kasan_report_error(struct kasan_access_info *info)
{
unsigned long flags;
const char *bug_type;
kasan_start_report(&flags);
if (info->access_addr <
kasan_shadow_to_mem((void *)KASAN_SHADOW_START)) {
if ((unsigned long)info->access_addr < PAGE_SIZE)
bug_type = "null-ptr-deref";
else if ((unsigned long)info->access_addr < TASK_SIZE)
bug_type = "user-memory-access";
else
bug_type = "wild-memory-access";
pr_err("BUG: KASAN: %s on address %p\n",
bug_type, info->access_addr);
pr_err("%s of size %zu by task %s/%d\n",
info->is_write ? "Write" : "Read",
info->access_size, current->comm,
task_pid_nr(current));
dump_stack();
} else {
print_error_description(info);
print_address_description(info);
print_shadow_for_address(info->first_bad_addr);
}
kasan_end_report(&flags);
}
void kasan_report_double_free(struct kmem_cache *cache, void *object,
s8 shadow)
{
unsigned long flags;
kasan_start_report(&flags);
pr_err("BUG: Double free or freeing an invalid pointer\n");
pr_err("Unexpected shadow byte: 0x%hhX\n", shadow);
kasan_object_err(cache, object);
kasan_end_report(&flags);
}
void kasan_report_invalid_free(void *object, unsigned long ip)
{
unsigned long flags;
kasan_start_report(&flags);
pr_err("BUG: KASAN: double-free or invalid-free in %pS\n", (void *)ip);
pr_err("\n");
print_address_description(object);
pr_err("\n");
print_shadow_for_address(object);
kasan_end_report(&flags);
}
static void kasan_report_error(struct kasan_access_info *info)
{
unsigned long flags;
kasan_start_report(&flags);
print_error_description(info);
pr_err("\n");
if (!addr_has_shadow(info)) {
dump_stack();
} else {
print_address_description((void *)info->access_addr);
pr_err("\n");
print_shadow_for_address(info->first_bad_addr);
}
kasan_end_report(&flags);
}
