[PATCH] cgroup: avoid cgroup root name longer than max

[Ma Shimiao]

cgroup root name has max length limit, we should avoid copying
longer name than that to the name.

Signed-off-by: Ma Shimiao <mashimiao.f...@cn.fujitsu.com>
---
 kernel/cgroup/cgroup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 0b1ffe147f24..3614a21ad6b8 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1866,7 +1866,7 @@ void init_cgroup_root(struct cgroup_root *root, struct 
cgroup_sb_opts *opts)
        if (opts->release_agent)
                strcpy(root->release_agent_path, opts->release_agent);
        if (opts->name)
-               strcpy(root->name, opts->name);
+               strncpy(root->name, opts->name, MAX_CGROUP_ROOT_NAMELEN);
        if (opts->cpuset_clone_children)
                set_bit(CGRP_CPUSET_CLONE_CHILDREN, &root->cgrp.flags);
 }
-- 
2.13.6