--- zzzz-none-000/linux-3.10.107/drivers/misc/sgi-gru/gruprocfs.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/misc/sgi-gru/gruprocfs.c	2021-02-04 17:41:59.000000000 +0000
@@ -160,15 +160,11 @@
 static ssize_t options_write(struct file *file, const char __user *userbuf,
 			     size_t count, loff_t *data)
 {
-	char buf[20];
+	int ret;
 
-	if (count >= sizeof(buf))
-		return -EINVAL;
-	if (copy_from_user(buf, userbuf, count))
-		return -EFAULT;
-	buf[count] = '\0';
-	if (strict_strtoul(buf, 0, &gru_options))
-		return -EINVAL;
+	ret = kstrtoul_from_user(userbuf, count, 0, &gru_options);
+	if (ret)
+		return ret;
 
 	return count;
 }