#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
+#include <linux/export.h>
#include "rds.h"
/* check for all kinds of wrapping and the like */
start = (unsigned long)optval;
- if (len < 0 || len + PAGE_SIZE - 1 < len || start + len < start) {
+ if (len < 0 || len > INT_MAX - PAGE_SIZE + 1 || start + len < start) {
ret = -EINVAL;
goto out;
}