lib: Fix memory leak when debugging enabled (found by valgrind).

[libguestfs.git] / daemon / findfs.c

diff --git a/daemon/findfs.c b/daemon/findfs.c
index 0520f18..2c624b6 100644 (file)
--- a/daemon/findfs.c
+++ b/daemon/findfs.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>
@@ -56,6 +56,22 @@ findfs (const char *tag, const char *label_or_uuid)
   if (len > 0 && out[len-1] == '\n')
     out[len-1] = '\0';
 
+  if (STRPREFIX (out, "/dev/mapper/") || STRPREFIX (out, "/dev/dm-")) {
+    char *canonical;
+    r = lv_canonical (out, &canonical);
+    if (r == -1) {
+      free (out);
+      return NULL;
+    }
+    if (r == 1) {
+      free (out);
+      out = canonical;
+    }
+    /* Ignore the case where r == 0.  /dev/mapper does not correspond
+     * to an LV, so the best we can do is just return it as-is.
+     */
+  }
+
   return out;                   /* caller frees */
 }