libdm: init char array

When non-root uses dm_check_version() it's been printing some unit
values from stack. So always init those vars.

diff --git a/WHATS_NEW_DM b/WHATS_NEW_DM
index 6981f8f1eb66f4220b05e74bdd2a5a9b221249b8..6b5ee3a0f5a3f3bcf843539a0089a43016fef073 100644 (file)
--- a/WHATS_NEW_DM
+++ b/WHATS_NEW_DM
@@ -1,5 +1,6 @@
 Version 1.02.91 - 
 ====================================
+  Don't print uninitialized stack bytes when non-root uses dm_check_version().
   Fix selection criteria to not match reserved values when using >, <, >=, <.
   Add DM_LIST_HEAD_INIT macro to libdevmapper.h
   Fix dm_is_dm_major to not issue error about missing /proc lines for dm module.

diff --git a/libdm/ioctl/libdm-iface.c b/libdm/ioctl/libdm-iface.c
index c308fd26a1c8061a73e17ec89fb9053487a984e1..4c37a539b304b1533da0728212ff899be97051d5 100644 (file)
--- a/libdm/ioctl/libdm-iface.c
+++ b/libdm/ioctl/libdm-iface.c
@@ -544,7 +544,7 @@ static int _check_version(char *version, size_t size, int log_suppress)
  */
 int dm_check_version(void)
 {
-       char libversion[64], dmversion[64];
+       char libversion[64] = "", dmversion[64] = "";
        const char *compat = "";
 
        if (_version_checked)