diff options
| author | Micha Kalfon <micha@cellrox.com> | 2015-01-13 12:12:57 +0200 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-02-16 13:53:49 -0800 |
| commit | d4d049c55d0f0fa7fb5521a83c7e0c029c80e7c0 (patch) | |
| tree | af0ea648d6aaab5fc098120fc1f94eaa2318a682 | |
| parent | 18f42f60bedb93c9e90641bf9a551f9c0caf0a40 (diff) | |
prctl: make PR_SET_TIMERSLACK_PID pid namespace aware
Make PR_SET_TIMERSLACK_PID consider pid namespace and resolve the
target pid in the caller's namespace. Otherwise, calls from pid
namespace other than init would fail or affect the wrong task.
Change-Id: I1da15196abc4096536713ce03714e99d2e63820a
Signed-off-by: Micha Kalfon <micha@cellrox.com>
Acked-by: Oren Laadan <orenl@cellrox.com>
| -rw-r--r-- | kernel/sys.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 0f45fb855fe3..66b933a5c061 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -2220,11 +2220,11 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, error = prctl_get_tid_address(me, (int __user **)arg2); break; case PR_SET_TIMERSLACK_PID: - if (current->pid != (pid_t)arg3 && + if (task_pid_vnr(current) != (pid_t)arg3 && !capable(CAP_SYS_NICE)) return -EPERM; rcu_read_lock(); - tsk = find_task_by_pid_ns((pid_t)arg3, &init_pid_ns); + tsk = find_task_by_vpid((pid_t)arg3); if (tsk == NULL) { rcu_read_unlock(); return -EINVAL; |