From: deraadt <deraadt@openbsd.org>
Date: Sat, 10 Oct 2015 19:12:39 +0000 (+0000)
Subject: pid 0 also implies self, so allow that for the pledge case.  Found in
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=e420f7bd85d6698d7d0d8a2127cd4d7c289dbe62;p=openbsd

pid 0 also implies self, so allow that for the pledge case.  Found in
a refactoring being done for the bc/dc relationship with otto.
---

diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index e4a17024f77..536c41f1ce5 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: kern_sig.c,v 1.185 2015/10/09 23:55:03 deraadt Exp $	*/
+/*	$OpenBSD: kern_sig.c,v 1.186 2015/10/10 19:12:39 deraadt Exp $	*/
 /*	$NetBSD: kern_sig.c,v 1.54 1996/04/22 01:38:32 christos Exp $	*/
 
 /*
@@ -572,7 +572,8 @@ sys_kill(struct proc *cp, void *v, register_t *retval)
 
 	if (cp->p_p->ps_flags & PS_PLEDGE) {
 		/* PLEDGE_PROC is required to signal another pid */
-		if ((cp->p_p->ps_pledge & PLEDGE_PROC) || pid == cp->p_pid)
+		if ((cp->p_p->ps_pledge & PLEDGE_PROC) ||
+		    pid == cp->p_pid || pid == 0)
 			;
 		else
 			return pledge_fail(cp, EPERM, PLEDGE_SELF);