lk/linux-kernel-test
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Merge branch 'next' into for-linus

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This commit is contained in:
James Morris
2008-12-25 11:40:09 +11:00
parent 4a6908a3a0 7419224691
commit cbacc2c7f0
223 changed files with 5707 additions and 3351 deletions
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26
kernel/sched.c
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@@ -345,7 +345,9 @@ static inline struct task_group *task_group(struct task_struct *p)
struct task_group *tg;
#ifdef CONFIG_USER_SCHED
tg = p->user->tg;
rcu_read_lock();
tg = __task_cred(p)->user->tg;
rcu_read_unlock();
#elif defined(CONFIG_CGROUP_SCHED)
tg = container_of(task_subsys_state(p, cpu_cgroup_subsys_id),
struct task_group, css);
@@ -5134,6 +5136,22 @@ __setscheduler(struct rq *rq, struct task_struct *p, int policy, int prio)
set_load_weight(p);
}
/*
* check the target process has a UID that matches the current process's
*/
static bool check_same_owner(struct task_struct *p)
{
const struct cred *cred = current_cred(), *pcred;
bool match;
rcu_read_lock();
pcred = __task_cred(p);
match = (cred->euid == pcred->euid ||
cred->euid == pcred->uid);
rcu_read_unlock();
return match;
}
static int __sched_setscheduler(struct task_struct *p, int policy,
struct sched_param *param, bool user)
{
@@ -5193,8 +5211,7 @@ recheck:
return -EPERM;
/* can't change other user's priorities */
if ((current->euid != p->euid) &&
(current->euid != p->uid))
if (!check_same_owner(p))
return -EPERM;
}
@@ -5426,8 +5443,7 @@ long sched_setaffinity(pid_t pid, const cpumask_t *in_mask)
read_unlock(&tasklist_lock);
retval = -EPERM;
if ((current->euid != p->euid) && (current->euid != p->uid) &&
!capable(CAP_SYS_NICE))
if (!check_same_owner(p) && !capable(CAP_SYS_NICE))
goto out_unlock;
retval = security_task_setscheduler(p, 0, NULL);