From: Jonathan Wakely <jwakely@redhat.com>
To: libstdc++@gcc.gnu.org, gcc-patches@gcc.gnu.org
Cc: Jason Merrill <jason@redhat.com>
Subject: [PATCH] libcody: Avoid double-free
Date: Thu, 21 Oct 2021 14:27:14 +0100 [thread overview]
Message-ID: <20211021132714.636039-1-jwakely@redhat.com> (raw)
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.
---
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)
{
--
2.31.1
next reply other threads:[~2021-10-21 13:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 13:27 Jonathan Wakely [this message]
2021-10-21 13:30 ` Jonathan Wakely
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