--- IO-FDPass/FDPass.xs	2014/10/31 07:09:43	1.6
+++ IO-FDPass/FDPass.xs	2021/01/03 23:54:05	1.8
@@ -34,11 +34,11 @@
   #include <sys/socket.h>
 
   #ifndef CMSG_SPACE
-  # define CMSG_SPACE(len) (sizeof (cmsghdr) + len)
+  # define CMSG_SPACE(len) (sizeof (struct cmsghdr) + len)
   #endif
 
   #ifndef CMSG_LEN
-  # define CMSG_LEN(len) (sizeof (cmsghdr) + len)
+  # define CMSG_LEN(len) (sizeof (struct cmsghdr) + len)
   #endif
 
 #endif
@@ -191,7 +191,10 @@
   msg.msg_controllen = CMSG_SPACE (sizeof (int));
 
   if (recvmsg (socket, &msg, 0) <= 0)
-    return -1;
+    {
+      free (buf);
+      return -1;
+    }
 
   int fd = -1;
   errno = EDOM;