[src/trunk]: src/sys/compat/freebsd Avoid NULL dereference and fix sched para...

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

details:   https://anonhg.NetBSD.org/src/rev/5d9777f68596
branches:  trunk
changeset: 796846:5d9777f68596
user:      christos <christos%NetBSD.org@localhost>
date:      Sat Jun 21 23:12:10 2014 +0000

description:
Avoid NULL dereference and fix sched param conversion (at least make it
do something). Pointed out by Maxime Villard

diffstat:

 sys/compat/freebsd/freebsd_sched.c |  44 +++++++++++++++++++-------------------
 1 files changed, 22 insertions(+), 22 deletions(-)

diffs (103 lines):

diff -r 8b6ba029f9f4 -r 5d9777f68596 sys/compat/freebsd/freebsd_sched.c
--- a/sys/compat/freebsd/freebsd_sched.c        Sat Jun 21 21:05:54 2014 +0000
+++ b/sys/compat/freebsd/freebsd_sched.c        Sat Jun 21 23:12:10 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: freebsd_sched.c,v 1.19 2008/04/28 20:23:41 martin Exp $        */
+/*     $NetBSD: freebsd_sched.c,v 1.20 2014/06/21 23:12:10 christos Exp $      */
 
 /*-
  * Copyright (c) 1999 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: freebsd_sched.c,v 1.19 2008/04/28 20:23:41 martin Exp $");
+__KERNEL_RCSID(0, "$NetBSD: freebsd_sched.c,v 1.20 2014/06/21 23:12:10 christos Exp $");
 
 #include <sys/param.h>
 #include <sys/mount.h>
@@ -62,12 +62,13 @@
  */
 static int
 sched_freebsd2native(int freebsd_policy,
-    struct freebsd_sched_param *freebsd_params, int *native_policy,
+    const struct freebsd_sched_param *freebsd_params, int *native_policy,
     struct sched_param *native_params)
 {
-       int error;
+       int p;
 
-       error = 0;
+       if (native_policy == NULL)
+               native_policy = &p;
 
        switch (freebsd_policy) {
        case FREEBSD_SCHED_OTHER:
@@ -83,27 +84,26 @@
                break;
 
        default:
-               error = EINVAL;
-               break;
+               return EINVAL;
        }
  
-       if (freebsd_params != NULL && native_params != NULL && !error) {
-               native_params = (struct sched_param *)freebsd_params;
+       if (freebsd_params != NULL && native_params != NULL) {
+               /* XXX: Needs adjustment to do a proper conversion. */
+               native_params->sched_priority = freebsd_params->sched_priority;
        }
-        
-       return (error);
+       return 0;
 }
 
 /*
- * XXX: Needs adjustment to do a proper conversion.
  */
 static int
-sched_native2freebsd(int native_policy, struct sched_param *native_params,
+sched_native2freebsd(int native_policy, const struct sched_param *native_params,
     int *freebsd_policy, struct freebsd_sched_param *freebsd_params)
 {
-       int error;
+       int p;
 
-       error = 0;
+       if (freebsd_policy == NULL)
+               freebsd_policy = &p;
 
        switch (native_policy) {
        case SCHED_OTHER:
@@ -119,15 +119,15 @@
                break;
 
        default:
-               error = EINVAL;
-               break;
+               return EINVAL;
        }
  
-       if (native_params != NULL && freebsd_params != NULL && !error) {
-               freebsd_params = (struct freebsd_sched_param *)native_params;
+       if (native_params != NULL && freebsd_params != NULL) {
+               /* XXX: Needs adjustment to do a proper conversion. */
+               freebsd_params->sched_priority = native_params->sched_priority;
        }
-        
-       return (error);
+
+       return 0;
 }
 
 int
@@ -199,7 +199,7 @@
                goto out;
 
  out:
-       return (error);
+       return error;
 }
 
 int