From: Jonathan Wakely <jwakely@redhat.com>
Date: Thu, 21 Oct 2021 13:17:43 +0000 (+0100)
Subject: libcody: Avoid double-free
X-Git-Tag: basepoints/gcc-13~3693
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e6d100354317475412161a487ffbcf36582115c5;p=thirdparty%2Fgcc.git

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 30202c5106ab..0499b5790b45 100644
--- 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)
     {