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userns: Convert sched_set_affinity and sched_set_scheduler's permission checks

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- Compare kuids with uid_eq
- kuid are uniuqe across all user namespaces so there is no longer the
  need for a user_namespace comparison.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-02-02 18:54:02 -08:00
parent 76b6db0102
commit 9c806aa06f
1 changed files with 2 additions and 5 deletions
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7
kernel/sched/core.c
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@ -4042,11 +4042,8 @@ static bool check_same_owner(struct task_struct *p)
rcu_read_lock();
pcred = __task_cred(p);
if (cred->user_ns == pcred->user_ns)
match = (cred->euid == pcred->euid ||
cred->euid == pcred->uid);
else
match = false;
match = (uid_eq(cred->euid, pcred->euid) ||
uid_eq(cred->euid, pcred->uid));
rcu_read_unlock();
return match;
}