From d4d049c55d0f0fa7fb5521a83c7e0c029c80e7c0 Mon Sep 17 00:00:00 2001 From: Micha Kalfon Date: Tue, 13 Jan 2015 12:12:57 +0200 Subject: [PATCH] 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 Acked-by: Oren Laadan --- kernel/sys.c | 4 ++-- 1 file 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; -- 2.34.1