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Sync OpenBSD patchset 462:

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Don't do anything in the client callback if the client has already died to
avoid a use-after-free (the callback is used twice, once for the client itself
and once for the tty). Fixes crashes seen by Han Boetes.
This commit is contained in:
Tiago Cunha 2009-10-28 23:06:41 +00:00
parent 5a4ba76293
commit 876ded6dfe
1 changed files with 4 additions and 1 deletions
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5
server-client.c
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@ -1,4 +1,4 @@
/* $Id: server-client.c,v 1.7 2009-10-28 22:50:24 tcunha Exp $ */ /* $Id: server-client.c,v 1.8 2009-10-28 23:06:41 tcunha Exp $ */
/* /*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net> * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
@ -152,6 +152,9 @@ server_client_callback(int fd, int events, void *data)
{ {
struct client *c = data; struct client *c = data;
if (c->flags & CLIENT_DEAD)
return;
if (fd == c->ibuf.fd) { if (fd == c->ibuf.fd) {
if (events & (POLLERR|POLLNVAL|POLLHUP)) if (events & (POLLERR|POLLNVAL|POLLHUP))
goto client_lost; goto client_lost;