patch-2.1.90 linux/fs/proc/base.c

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diff -u --recursive --new-file v2.1.89/linux/fs/proc/base.c linux/fs/proc/base.c
@@ -60,12 +60,14 @@
 	int pid = inode->i_ino >> 16;
 	int ino = inode->i_ino & 0xffff;
 
+	read_lock(&tasklist_lock);
 	if (fill && (p = find_task_by_pid(pid)) != NULL) {
 		if (p->dumpable || ino == PROC_PID_INO) {
 			inode->i_uid = p->euid;
 			inode->i_gid = p->gid;
 		}
 	}
+	read_unlock(&tasklist_lock);
 }
 
 /*

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