[PATCH 1/3] tools/libxl/libxl_qmp.c: Make sure sun_path is NULL terminated in qmp_open

[PRAMOD DEVENDRA <pramod.devendra@citrix.com>]

From: Pramod Devendra <pramod.devendra@citrix.com>

Signed-off-by: Pramod Devendra <pramod.devendra@citrix.com>
CC: Ian Jackson <ian.jackson@eu.citrix.com>
CC: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
CC: Ian Campbell <ian.campbell@citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
---
 tools/libxl/libxl_qmp.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/libxl/libxl_qmp.c b/tools/libxl/libxl_qmp.c
index c7324e6..1080162 100644
--- a/tools/libxl/libxl_qmp.c
+++ b/tools/libxl/libxl_qmp.c
@@ -369,10 +369,13 @@ static int qmp_open(libxl__qmp_handler *qmp, const char *qmp_socket_path,
     ret = libxl_fd_set_cloexec(qmp->ctx, qmp->qmp_fd, 1);
     if (ret) return -1;
 
+    if(sizeof (qmp->addr.sun_path) <= strlen(qmp_socket_path))
+        return -1;
+
     memset(&qmp->addr, 0, sizeof (qmp->addr));
     qmp->addr.sun_family = AF_UNIX;
     strncpy(qmp->addr.sun_path, qmp_socket_path,
-            sizeof (qmp->addr.sun_path));
+            sizeof (qmp->addr.sun_path)-1);
 
     do {
         ret = connect(qmp->qmp_fd, (struct sockaddr *) &qmp->addr,
-- 
1.7.10.4