diff --git a/[refs] b/[refs]
index 2ec7c424a580..d5175df3a7fb 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9c95258c0d5911ae263bf50d854e402ce973ab32
+refs/heads/master: 7b26d82f5ea7de5667f87bb5ac6570111d7bff9f
diff --git a/trunk/drivers/s390/char/sclp_async.c b/trunk/drivers/s390/char/sclp_async.c
index 740fe405c395..f449c696e503 100644
--- a/trunk/drivers/s390/char/sclp_async.c
+++ b/trunk/drivers/s390/char/sclp_async.c
@@ -84,6 +84,7 @@ static int proc_handler_callhome(struct ctl_table *ctl, int write,
 		rc = copy_from_user(buf, buffer, sizeof(buf));
 		if (rc != 0)
 			return -EFAULT;
+		buf[len - 1] = '\0';
 		if (strict_strtoul(buf, 0, &val) != 0)
 			return -EINVAL;
 		if (val != 0 && val != 1)