X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=mm%2Fmempolicy.c;h=e412ffa8e52ea945fb2ffa94a8de388e2de0875e;hb=daf4b805c1711f730d42a5dfc5a65ee05b3c9ecf;hp=e9493b1c1117a4090fa8998b9ea2e29c1239ebbc;hpb=93b8eef1c098efbea2f1fc0be7e3c681f259a7e7;p=linux-2.6-omap-h63xx.git

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index e9493b1c111..e412ffa8e52 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1114,6 +1114,7 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
 		const unsigned long __user *old_nodes,
 		const unsigned long __user *new_nodes)
 {
+	const struct cred *cred = current_cred(), *tcred;
 	struct mm_struct *mm;
 	struct task_struct *task;
 	nodemask_t old;
@@ -1148,12 +1149,16 @@ asmlinkage long sys_migrate_pages(pid_t pid, unsigned long maxnode,
 	 * capabilities, superuser privileges or the same
 	 * userid as the target process.
 	 */
-	if ((current->euid != task->suid) && (current->euid != task->uid) &&
-	    (current->uid != task->suid) && (current->uid != task->uid) &&
+	rcu_read_lock();
+	tcred = __task_cred(task);
+	if (cred->euid != tcred->suid && cred->euid != tcred->uid &&
+	    cred->uid  != tcred->suid && cred->uid  != tcred->uid &&
 	    !capable(CAP_SYS_NICE)) {
+		rcu_read_unlock();
 		err = -EPERM;
 		goto out;
 	}
+	rcu_read_unlock();
 
 	task_nodes = cpuset_mems_allowed(task);
 	/* Is the user allowed to access the target nodes? */