diff --git a/src/lxc/attach.c b/src/lxc/attach.c
index d8b4915d5..a33d24f89 100644
--- a/src/lxc/attach.c
+++ b/src/lxc/attach.c
@@ -114,7 +114,8 @@ struct lxc_proc_context_info *lxc_proc_get_context_info(pid_t pid)
 		}
 	}
 
-	free(line);
+	if (line)
+		free(line);
 	fclose(proc_file);
 
 	if (!found) {
diff --git a/src/lxc/cgroup.c b/src/lxc/cgroup.c
index 2ffbb54b5..bb1268b30 100644
--- a/src/lxc/cgroup.c
+++ b/src/lxc/cgroup.c
@@ -503,7 +503,8 @@ static char *get_all_cgroups(void)
 	}
 
 out:
-	free(line);
+	if (line)
+		free(line);
 	fclose(f);
 	return ret;
 }