libcody: Avoid double-free

If the listen call fails then 'goto fail' will jump to that label and
use freeaddrinfo again. Set the pointer to null to prevent that.

libcody/ChangeLog:

	* netserver.cc (ListenInet6): Set pointer to null after
	deallocation.

diff --git a/libcody/netserver.cc b/libcody/netserver.cc
index 30202c5..0499b57 100644 (file)
--- a/libcody/netserver.cc
+++ b/libcody/netserver.cc
@@ -140,6 +140,7 @@ int ListenInet6 (char const **e, char const *name, int port, unsigned backlog)
 
  listen:;
   freeaddrinfo (addrs);
+  addrs = nullptr;
 
   if (listen (fd, backlog ? backlog : 17) < 0)
     {