Re: [PATCH] libcody: Avoid double-free

[Jason Merrill via Gcc-patches]

On 10/21/21 09:27, Jonathan Wakely wrote:

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.

OK.

libcody/ChangeLog:

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

      {