From: ben <ben@cda61777-01e9-0310-a592-d414129be87e>
Date: Sat, 11 Jan 2003 17:36:24 +0000 (+0000)
Subject: Calling plug_closing() is highly likely to result in a call to sk_close(),
X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/commitdiff_plain/5320c49258059b6a929ae844d7487a353d189c53?ds=sidebyside

Calling plug_closing() is highly likely to result in a call to sk_close(),
so arrange that mactcp_poll() can cope with that and not access freed memory
when it happens.


git-svn-id: svn://svn.tartarus.org/sgt/putty@2545 cda61777-01e9-0310-a592-d414129be87e
---

diff --git a/mac/mtcpnet.c b/mac/mtcpnet.c
index bd630878..54ca10ca 100644
--- a/mac/mtcpnet.c
+++ b/mac/mtcpnet.c
@@ -603,11 +603,11 @@ static pascal void mactcp_asr(StreamPtr str, unsigned short event, Ptr cookie,
  */
 void mactcp_poll(void)
 {
-    Actual_Socket s;
+    Actual_Socket s, next;
     TCPiopb pb;
 
-    for (s = mactcp.socklist; s != NULL; s = s->next) {
-	/* XXX above can't handle sockets being deleted. */
+    for (s = mactcp.socklist; s != NULL; s = next) {
+	next = s->next;
 	do {
 	    pb.ioCRefNum = mactcp.refnum;
 	    pb.csCode = TCPStatus;