On Wed, Aug 07, 2024 at 02:25:23PM GMT, Tejun Heo <tj@xxxxxxxxxx> wrote:
> +void cgroup_show_cftype(struct cftype *cft, bool show)
> +{
> + struct cgroup_subsys *ss = cft->ss;
> + struct cgroup *root = ss ? &ss->root->cgrp : &cgrp_dfl_root.cgrp;
Strictly speaking, this (v1) cgroup_root dereference should be guarded
with cgroup_mutex too (should be the root destroy concurrently).
> + struct cgroup_subsys_state *css;
> +
> + mutex_lock(&cgroup_mutex);
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