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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-08-21 21:08:50 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-08-28 11:50:25 +0200 |
| commit | e5a8b65b4cb2fe024b83bdec0424269949cc0a27 (patch) | |
| tree | 5115da704885aa8ac13319cc608c768643adf5ec /kernel/time | |
| parent | bfcf3e92c6c07cd1084624bad5622f3dad96328c (diff) | |
| download | linux-e5a8b65b4cb2fe024b83bdec0424269949cc0a27.tar.gz | |
posix-cpu-timers: Use common permission check in posix_cpu_timer_create()
Yet another copy of the same thing gone... Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lkml.kernel.org/r/20190821192919.505833418@linutronix.de
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/posix-cpu-timers.c | 35 |
1 files changed, 3 insertions, 32 deletions
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index eb11117bf227..4426a0f9c470 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -316,44 +316,15 @@ static int posix_cpu_clock_get(const clockid_t clock, struct timespec64 *tp) */ static int posix_cpu_timer_create(struct k_itimer *new_timer) { - int ret = 0; - const pid_t pid = CPUCLOCK_PID(new_timer->it_clock); - struct task_struct *p; + struct task_struct *p = get_task_for_clock(new_timer->it_clock); - if (CPUCLOCK_WHICH(new_timer->it_clock) >= CPUCLOCK_MAX) + if (!p) return -EINVAL; new_timer->kclock = &clock_posix_cpu; - INIT_LIST_HEAD(&new_timer->it.cpu.entry); - - rcu_read_lock(); - if (CPUCLOCK_PERTHREAD(new_timer->it_clock)) { - if (pid == 0) { - p = current; - } else { - p = find_task_by_vpid(pid); - if (p && !same_thread_group(p, current)) - p = NULL; - } - } else { - if (pid == 0) { - p = current->group_leader; - } else { - p = find_task_by_vpid(pid); - if (p && !has_group_leader_pid(p)) - p = NULL; - } - } new_timer->it.cpu.task = p; - if (p) { - get_task_struct(p); - } else { - ret = -EINVAL; - } - rcu_read_unlock(); - - return ret; + return 0; } /* |