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 bd63087..54ca10c 100644 (file)
--- 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;