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* [gcc r12-4620] libcody: Avoid double-free
@ 2021-10-21 21:31 Jonathan Wakely
  0 siblings, 0 replies; only message in thread
From: Jonathan Wakely @ 2021-10-21 21:31 UTC (permalink / raw)
  To: gcc-cvs

https://gcc.gnu.org/g:e6d100354317475412161a487ffbcf36582115c5

commit r12-4620-ge6d100354317475412161a487ffbcf36582115c5
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Oct 21 14:17:43 2021 +0100

    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:
---
 libcody/netserver.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libcody/netserver.cc b/libcody/netserver.cc
index 30202c5106a..0499b5790b4 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)
     {


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