提交 71b1fb5c 编写于 作者: A Alban Crequy 提交者: Tejun Heo

cgroup: reject cgroup names with '\n'

/proc/<pid>/cgroup contains one cgroup path on each line. If cgroup names are
allowed to contain "\n", applications cannot parse /proc/<pid>/cgroup safely.
Signed-off-by: NAlban Crequy <alban.crequy@collabora.co.uk>
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: stable@vger.kernel.org
上级 7d1311b9
......@@ -4543,6 +4543,11 @@ static int cgroup_mkdir(struct kernfs_node *parent_kn, const char *name,
struct cftype *base_files;
int ssid, ret;
/* Do not accept '\n' to prevent making /proc/<pid>/cgroup unparsable.
*/
if (strchr(name, '\n'))
return -EINVAL;
parent = cgroup_kn_lock_live(parent_kn);
if (!parent)
return -ENODEV;
......
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