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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 10 Oct 2011 13:16:39 +0000 (UTC)
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Subject: svn commit: r226206 - stable/8/sys/kern
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Author: kib
Date: Mon Oct 10 13:16:39 2011
New Revision: 226206
URL: http://svn.freebsd.org/changeset/base/226206

Log:
  MFC r225942:
  Assert that exiting process does not return to usermode.

Modified:
  stable/8/sys/kern/subr_trap.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)

Modified: stable/8/sys/kern/subr_trap.c
==============================================================================
--- stable/8/sys/kern/subr_trap.c	Mon Oct 10 13:03:14 2011	(r226205)
+++ stable/8/sys/kern/subr_trap.c	Mon Oct 10 13:16:39 2011	(r226206)
@@ -96,6 +96,8 @@ userret(struct thread *td, struct trapfr
 
 	CTR3(KTR_SYSC, "userret: thread %p (pid %d, %s)", td, p->p_pid,
             td->td_name);
+	KASSERT((p->p_flag & P_WEXIT) == 0,
+	    ("Exiting process returns to usermode"));
 #if 0
 #ifdef DIAGNOSTIC
 	/* Check that we called signotify() enough. */