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authorMa Shimiao <mashimiao.fnst@cn.fujitsu.com>2017-12-12 09:43:49 +0800
committerTejun Heo <tj@kernel.org>2017-12-12 07:53:29 -0800
commite7fd37ba12170cc414be8b639dfc2c5f7172fac2 (patch)
treec8e28735d16cf75f102f08bc9500f5b128a42bc2 /kernel/cgroup
parentc2f31b79d510ec1a27138bdcf2d0ece1080be85e (diff)
downloadlinux-e7fd37ba12170cc414be8b639dfc2c5f7172fac2.tar.bz2
cgroup: avoid copying strings longer than the buffers
cgroup root name and file name have max length limit, we should avoid copying longer name than that to the name. tj: minor update to $SUBJ. Signed-off-by: Ma Shimiao <mashimiao.fnst@cn.fujitsu.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup')
-rw-r--r--kernel/cgroup/cgroup.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 0b1ffe147f24..18d71fbd3923 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1397,7 +1397,7 @@ static char *cgroup_file_name(struct cgroup *cgrp, const struct cftype *cft,
cgroup_on_dfl(cgrp) ? ss->name : ss->legacy_name,
cft->name);
else
- strncpy(buf, cft->name, CGROUP_FILE_NAME_MAX);
+ strscpy(buf, cft->name, CGROUP_FILE_NAME_MAX);
return buf;
}
@@ -1864,9 +1864,9 @@ void init_cgroup_root(struct cgroup_root *root, struct cgroup_sb_opts *opts)
root->flags = opts->flags;
if (opts->release_agent)
- strcpy(root->release_agent_path, opts->release_agent);
+ strscpy(root->release_agent_path, opts->release_agent, PATH_MAX);
if (opts->name)
- strcpy(root->name, opts->name);
+ strscpy(root->name, opts->name, MAX_CGROUP_ROOT_NAMELEN);
if (opts->cpuset_clone_children)
set_bit(CGRP_CPUSET_CLONE_CHILDREN, &root->cgrp.flags);
}