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Subject[PATCH 21/43] userns: Convert sched_set_affinity and sched_set_scheduler's permission checks
From: Eric W. Biederman <ebiederm@xmission.com>

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

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
kernel/sched/core.c | 7 ++-----
1 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 96bff85..b189fec 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -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;
}
--
1.7.2.5


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