diff --git a/src/os/darwin/darwin_sigar.c b/src/os/darwin/darwin_sigar.c
index 7856fdeb..9f0bb8ed 100644
--- a/src/os/darwin/darwin_sigar.c
+++ b/src/os/darwin/darwin_sigar.c
@@ -1983,6 +1983,7 @@ int sigar_file_system_list_get(sigar_t *sigar,
     fs = malloc(len);
 
     if ((num = sigar_getfsstat(fs, len, MNT_NOWAIT)) < 0) {
+        free(fs);
         return errno;
     }
 
@@ -2026,6 +2027,7 @@ int sigar_file_system_list_get(sigar_t *sigar,
         sigar_fs_type_init(fsp);
     }
 
+    free(fs);
     return SIGAR_OK;
 }
 
@@ -2445,8 +2447,10 @@ static int sigar_ifmsg_iter(sigar_t *sigar, ifmsg_iter_t *iter)
           case IFMSG_ITER_LIST:
             SIGAR_NET_IFLIST_GROW(iter->data.iflist);
 
+            /* sdl_data doesn't include a trailing \0, it is only sdl_nlen long */
             name = malloc(sdl->sdl_nlen+1);
-            memcpy(name, sdl->sdl_data, sdl->sdl_nlen+1);
+            memcpy(name, sdl->sdl_data, sdl->sdl_nlen);
+            name[sdl->sdl_nlen] = '\0'; /* add the missing \0 */
 
             iter->data.iflist->data[iter->data.iflist->number++] = name;
             break;