Remove cpath pledge(2) promise. We decided that not deleting the unix control

sockets cause no harm and this way we close another attack surface by not
allowing the daemon to create/delete any more files.

OK florian@

3 files changed, 4 insertions, 23 deletions

diff --git a/usr.sbin/vmd/control.c b/usr.sbin/vmd/control.c
index 9d2ec09e20e..2d3f0b804ec 100644
--- a/usr.sbin/vmd/control.c
+++ b/usr.sbin/vmd/control.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: control.c,v 1.28 2018/07/13 08:42:49 reyk Exp $	*/
+/*	$OpenBSD: control.c,v 1.29 2018/08/05 08:20:54 mestre Exp $	*/
 
 /*
  * Copyright (c) 2010-2015 Reyk Floeter <reyk@openbsd.org>
@@ -67,12 +67,11 @@ control_run(struct privsep *ps, struct privsep_proc *p, void *arg)
 	/*
 	 * pledge in the control process:
 	 * stdio - for malloc and basic I/O including events.
-	 * cpath - for managing the control socket.
 	 * unix - for the control socket.
 	 * recvfd - for the proc fd exchange.
 	 * sendfd - for send and receive.
 	 */
-	if (pledge("stdio cpath unix recvfd sendfd", NULL) == -1)
+	if (pledge("stdio unix recvfd sendfd", NULL) == -1)
 		fatal("pledge");
 }
 
@@ -205,15 +204,6 @@ control_listen(struct control_sock *cs)
 	return (0);
 }
 
-void
-control_cleanup(struct control_sock *cs)
-{
-	if (cs->cs_name == NULL)
-		return;
-	event_del(&cs->cs_ev);
-	event_del(&cs->cs_evt);
-}
-
 /* ARGSUSED */
 void
 control_accept(int listenfd, short event, void *arg)
diff --git a/usr.sbin/vmd/proc.c b/usr.sbin/vmd/proc.c
index 5443bdb9262..b37036908cd 100644
--- a/usr.sbin/vmd/proc.c
+++ b/usr.sbin/vmd/proc.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: proc.c,v 1.16 2017/11/04 07:40:31 mlarkin Exp $	*/
+/*	$OpenBSD: proc.c,v 1.17 2018/08/05 08:20:54 mestre Exp $	*/
 
 /*
  * Copyright (c) 2010 - 2016 Reyk Floeter <reyk@openbsd.org>
@@ -475,9 +475,6 @@ proc_shutdown(struct privsep_proc *p)
 {
 	struct privsep	*ps = p->p_ps;
 
-	if (p->p_id == PROC_CONTROL && ps)
-		control_cleanup(&ps->ps_csock);
-
 	if (p->p_shutdown != NULL)
 		(*p->p_shutdown)();
 
diff --git a/usr.sbin/vmd/proc.h b/usr.sbin/vmd/proc.h
index f0e4704aefb..01361076f54 100644
--- a/usr.sbin/vmd/proc.h
+++ b/usr.sbin/vmd/proc.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: proc.h,v 1.14 2018/07/15 14:36:54 reyk Exp $	*/
+/*	$OpenBSD: proc.h,v 1.15 2018/08/05 08:20:54 mestre Exp $	*/
 
 /*
  * Copyright (c) 2010-2015 Reyk Floeter <reyk@openbsd.org>
@@ -69,11 +69,6 @@ struct control_sock {
 };
 TAILQ_HEAD(control_socks, control_sock);
 
-struct {
-	struct event	 ev;
-	int		 fd;
-} control_state;
-
 struct ctl_conn {
 	TAILQ_ENTRY(ctl_conn)	 entry;
 	uint8_t			 flags;
@@ -197,7 +192,6 @@ void	 control(struct privsep *, struct privsep_proc *);
 int	 control_init(struct privsep *, struct control_sock *);
 int	 control_reset(struct control_sock *);
 int	 control_listen(struct control_sock *);
-void	 control_cleanup(struct control_sock *);
 
 /* log.c */
 void	log_init(int, int);