[src/trunk]: src/sys/uvm In uvm_proc_exit bail out early if we have no vmspac...

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b1a2a55026e5
branches:  trunk
changeset: 773659:b1a2a55026e5
user:      martin <martin%NetBSD.org@localhost>
date:      Sun Feb 12 11:18:04 2012 +0000

description:
In uvm_proc_exit bail out early if we have no vmspace yet (as it happens
for failing posix_spawn child processes).
Fixes PR kern/45991.

diffstat:

 sys/uvm/uvm_glue.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (27 lines):

diff -r 80b5a1b790d1 -r b1a2a55026e5 sys/uvm/uvm_glue.c
--- a/sys/uvm/uvm_glue.c        Sun Feb 12 10:01:57 2012 +0000
+++ b/sys/uvm/uvm_glue.c        Sun Feb 12 11:18:04 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uvm_glue.c,v 1.155 2012/02/11 23:16:18 martin Exp $    */
+/*     $NetBSD: uvm_glue.c,v 1.156 2012/02/12 11:18:04 martin Exp $    */
 
 /*
  * Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -62,7 +62,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_glue.c,v 1.155 2012/02/11 23:16:18 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_glue.c,v 1.156 2012/02/12 11:18:04 martin Exp $");
 
 #include "opt_kgdb.h"
 #include "opt_kstack.h"
@@ -416,6 +416,8 @@
 
        KASSERT(p == l->l_proc);
        ovm = p->p_vmspace;
+       if (__predict_false(ovm == NULL))
+               return;
 
        /*
         * borrow proc0's address space.