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Merge "memcg: Allow non-root users permission to control memory"

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Linux Build Service Account 2014-12-18 10:29:47 -08:00 committed by Gerrit - the friendly Code Review server
commit 348e3a3df5
1 changed files with 18 additions and 0 deletions
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18
mm/memcontrol.c
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@ -6941,6 +6941,23 @@ static void mem_cgroup_move_task(struct cgroup *cont,
}
#endif
static int mem_cgroup_allow_attach(struct cgroup *cgrp,
struct cgroup_taskset *tset)
{
const struct cred *cred = current_cred(), *tcred;
struct task_struct *task;
cgroup_taskset_for_each(task, cgrp, tset) {
tcred = __task_cred(task);
if ((current != task) && !capable(CAP_SYS_ADMIN) &&
cred->euid != tcred->uid && cred->euid != tcred->suid)
return -EACCES;
}
return 0;
}
/*
* Cgroup retains root cgroups across [un]mount cycles making it necessary
* to verify sane_behavior flag on each mount attempt.
@ -6966,6 +6983,7 @@ struct cgroup_subsys mem_cgroup_subsys = {
.can_attach = mem_cgroup_can_attach,
.cancel_attach = mem_cgroup_cancel_attach,
.attach = mem_cgroup_move_task,
.allow_attach = mem_cgroup_allow_attach,
.bind = mem_cgroup_bind,
.base_cftypes = mem_cgroup_files,
.early_init = 0,