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| author | Suren Baghdasaryan <surenb@google.com> | 2019-07-29 18:33:10 -0700 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2019-08-06 12:49:18 +0200 |
| commit | 04e048cf09d7b5fc995817cdc5ae1acd4482429c (patch) | |
| tree | b45b65f7a0373ff1e0be47ad5feb21d51917be13 /kernel | |
| parent | 14f5c7b46a41a595fc61db37f55721714729e59e (diff) | |
| download | linux-04e048cf09d7b5fc995817cdc5ae1acd4482429c.tar.gz | |
sched/psi: Do not require setsched permission from the trigger creator
When a process creates a new trigger by writing into /proc/pressure/* files, permissions to write such a file should be used to determine whether the process is allowed to do so or not. Current implementation would also require such a process to have setsched capability. Setting of psi trigger thread's scheduling policy is an implementation detail and should not be exposed to the user level. Remove the permission check by using _nocheck version of the function. Suggested-by: Nick Kralevich <nnk@google.com> Signed-off-by: Suren Baghdasaryan <surenb@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: lizefan@huawei.com Cc: mingo@redhat.com Cc: akpm@linux-foundation.org Cc: kernel-team@android.com Cc: dennisszhou@gmail.com Cc: dennis@kernel.org Cc: hannes@cmpxchg.org Cc: axboe@kernel.dk Link: https://lkml.kernel.org/r/20190730013310.162367-1-surenb@google.com
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/psi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c index 7fe2c5fd26b5..23fbbcc414d5 100644 --- a/kernel/sched/psi.c +++ b/kernel/sched/psi.c @@ -1061,7 +1061,7 @@ struct psi_trigger *psi_trigger_create(struct psi_group *group, mutex_unlock(&group->trigger_lock); return ERR_CAST(kworker); } - sched_setscheduler(kworker->task, SCHED_FIFO, ¶m); + sched_setscheduler_nocheck(kworker->task, SCHED_FIFO, ¶m); kthread_init_delayed_work(&group->poll_work, psi_poll_work); rcu_assign_pointer(group->poll_kworker, kworker); |