PERFORCE change 104436 for review

[Chris Jones]

http://perforce.freebsd.org/chv.cgi?CH=104436

Change 104436 by cdjones at cdjones_meanook on 2006/08/17 20:55:33

	Fix kernel panics by being more paranoid about KSEs having credentials.

Affected files ...

.. //depot/projects/soc2006/cdjones_jail/src/sys/kern/sched_hier.c#16 edit

Differences ...

==== //depot/projects/soc2006/cdjones_jail/src/sys/kern/sched_hier.c#16 (text+ko) ====

@@ -550,7 +550,8 @@
 				continue;
 			kg->kg_estcpu = decay_cpu(loadfac, kg->kg_estcpu);
 			total_est_cpu += kg->kg_estcpu;
-			if (kg->kg_proc->p_ucred->cr_prison)
+			if (NULL != kg->kg_proc->p_ucred &&
+			    NULL != kg->kg_proc->p_ucred->cr_prison)
 				kg->kg_proc->p_ucred->cr_prison->pr_estcpu += 
 				  kg->kg_estcpu;
 		      	resetpriority(kg);
@@ -641,7 +642,9 @@
 resetpriority(struct ksegrp *kg)
 {
 	register unsigned int newpriority;
-	struct prison *pr = kg->kg_proc->p_ucred->cr_prison;
+	struct prison *pr = NULL;
+	if (NULL != kg->kg_proc->p_ucred)
+		pr = kg->kg_proc->p_ucred->cr_prison;
 
 	if (kg->kg_pri_class == PRI_TIMESHARE) {
 		newpriority = PUSER + kg->kg_estcpu / INVERSE_ESTCPU_WEIGHT +