daemon: debug segv correct use of dereferencing NULL.

[libguestfs.git] / daemon / blockdev.c

diff --git a/daemon/blockdev.c b/daemon/blockdev.c
index 95e5246..d056abe 100644 (file)
--- a/daemon/blockdev.c
+++ b/daemon/blockdev.c
@@ -13,7 +13,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #include <config.h>
@@ -38,7 +38,7 @@ call_blockdev (const char *device, const char *switc, int extraarg, int prints)
   int64_t rv;
   char *out, *err;
   const char *argv[] = {
-    "/sbin/blockdev",
+    "blockdev",
     switc,
     NULL,
     NULL,
@@ -68,11 +68,13 @@ call_blockdev (const char *device, const char *switc, int extraarg, int prints)
     if (sscanf (out, "%" SCNi64, &rv) != 1) {
       reply_with_error ("%s: expected output, but got nothing", argv[0]);
       free (out);
+      free (err);
       return -1;
     }
   }
 
   free (out);
+  free (err);
 
   return rv;
 }