From b6a6759daf55dade2b65089957832759d502acfb Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Sat, 25 Feb 2017 01:56:48 -0800 Subject: [PATCH] cgroups: censor kernel pointer in debug files As found in grsecurity, this avoids exposing a kernel pointer through the cgroup debug entries. Signed-off-by: Kees Cook Signed-off-by: Tejun Heo --- kernel/cgroup/cgroup-v1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c index 56eba9caa632..1dc22f6b49f5 100644 --- a/kernel/cgroup/cgroup-v1.c +++ b/kernel/cgroup/cgroup-v1.c @@ -1329,7 +1329,7 @@ static int cgroup_css_links_read(struct seq_file *seq, void *v) struct task_struct *task; int count = 0; - seq_printf(seq, "css_set %p\n", cset); + seq_printf(seq, "css_set %pK\n", cset); list_for_each_entry(task, &cset->tasks, cg_list) { if (count++ > MAX_TASKS_SHOWN_PER_CSS)