[PATCH] Fix unterminated buffer after readlink() call

[Thomas Jarosch <thomas jarosch intra2net com>]

Patch is not compile tested as I lack some
dependencies to build NM on this box.

Signed-off-by: Thomas Jarosch <thomas jarosch intra2net com>
---
 src/nm-device-ethernet.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/src/nm-device-ethernet.c b/src/nm-device-ethernet.c
index 8556c5b..87cd57e 100644
--- a/src/nm-device-ethernet.c
+++ b/src/nm-device-ethernet.c
@@ -343,6 +343,7 @@ _update_s390_subchannels (NMDeviceEthernet *self)
 	while ((item = g_dir_read_name (dir))) {
 		char buf[50];
 		char *cdev_path;
+		ssize_t link_len;
 
 		if (strncmp (item, "cdev", 4))
 			continue;  /* Not a subchannel link */
@@ -351,7 +352,9 @@ _update_s390_subchannels (NMDeviceEthernet *self)
 
 		memset (buf, 0, sizeof (buf));
 		errno = 0;
-		if (readlink (cdev_path, &buf[0], sizeof (buf) - 1) >= 0) {
+		if ((link_len = readlink (cdev_path, buf, sizeof (buf) - 1)) >= 0) {
+			buf[link_len] = 0;
+
 			if (!priv->subchan1)
 				priv->subchan1 = g_path_get_basename (buf);
 			else if (!priv->subchan2)
-- 
1.7.4.4