From 73507f335f406ff31ceb97b39fa76eaee00f4f26 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Thu, 7 Feb 2008 00:14:47 -0800 Subject: [PATCH] Handle pid namespaces in cgroups code There's one place that works with task pids - its the "tasks" file in cgroups. The read/write handlers assume, that the pid values go to/come from the user space and thus it is a virtual pid, i.e. the pid as it is seen from inside a namespace. Tune the code accordingly. Signed-off-by: Pavel Emelyanov Cc: "Eric W. Biederman" Acked-by: Paul Menage Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/cgroup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/cgroup.c b/kernel/cgroup.c index 2c5cccbe12e2..4766bb65e4d9 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -1269,7 +1269,7 @@ static int attach_task_by_pid(struct cgroup *cgrp, char *pidbuf) if (pid) { rcu_read_lock(); - tsk = find_task_by_pid(pid); + tsk = find_task_by_vpid(pid); if (!tsk || tsk->flags & PF_EXITING) { rcu_read_unlock(); return -ESRCH; @@ -1955,7 +1955,7 @@ static int pid_array_load(pid_t *pidarray, int npids, struct cgroup *cgrp) while ((tsk = cgroup_iter_next(cgrp, &it))) { if (unlikely(n == npids)) break; - pidarray[n++] = task_pid_nr(tsk); + pidarray[n++] = task_pid_vnr(tsk); } cgroup_iter_end(cgrp, &it); return n; -- 2.20.1