Baokun Li wrote: > @@ -463,6 +463,8 @@ static ssize_t ext4_attr_store(struct kobject *kobj, > ret = kstrtoul(skip_spaces(buf), 0, &t); > if (ret) > return ret; > + if (t != (unsigned int)t) > + return -EINVAL; kstrto*() interface has variants for all standard types. It should be changed to kstrtou32() or kstrtouint(); If you check if kstrto*() result fits into another type, you're probably doing it wrong. > if (a->attr_ptr == ptr_ext4_super_block_offset) > *((__le32 *) ptr) = cpu_to_le32(t);
