--- ./include/linux/sched.h.nt	2004-09-13 18:00:12.000000000 +0400
+++ ./include/linux/sched.h	2004-09-13 18:06:03.680828072 +0400
@@ -699,6 +699,12 @@ extern struct task_struct *find_task_by_
 extern void set_special_pids(pid_t session, pid_t pgrp);
 extern void __set_special_pids(pid_t session, pid_t pgrp);
 
+/* checks whether task is still hashed and can be accessed safely */
+static inline int pid_alive(struct task_struct *p)
+{
+	return p->pids[PIDTYPE_PID].nr != 0;
+}
+
 /* per-UID process charging. */
 extern struct user_struct * alloc_uid(uid_t);
 static inline struct user_struct *get_uid(struct user_struct *u)
--- ./fs/proc/array.c.nt	2004-09-13 18:00:09.178720584 +0400
+++ ./fs/proc/array.c	2004-09-13 18:00:51.861231856 +0400
@@ -356,7 +356,7 @@ static int do_task_stat(struct task_stru
 			stime = task->signal->stime;
 		}
 	}
-	if (whole) {
+	if (whole && pid_alive(task)) {
 		t = task;
 		do {
 			min_flt += t->min_flt;
--- ./fs/proc/base.c.nt	2004-09-13 18:00:09.181720128 +0400
+++ ./fs/proc/base.c	2004-09-13 18:00:51.862231704 +0400
@@ -793,11 +793,6 @@ static struct inode_operations proc_pid_
 	.follow_link	= proc_pid_follow_link
 };
 
-static inline int pid_alive(struct task_struct *p)
-{
-	return p->pids[PIDTYPE_PID].nr != 0;
-}
-
 #define NUMBUF 10
 
 static int proc_readfd(struct file * filp, void * dirent, filldir_t filldir)