1 files changed, 12 insertions, 14 deletions

diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index b3744872263e..75f687301bbf 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -1816,24 +1816,19 @@ enum cgroup2_param {
 	nr__cgroup2_params
 };
 
-static const struct fs_parameter_spec cgroup2_param_specs[] = {
+static const struct fs_parameter_spec cgroup2_fs_parameters[] = {
 	fsparam_flag("nsdelegate",		Opt_nsdelegate),
 	fsparam_flag("memory_localevents",	Opt_memory_localevents),
 	{}
 };
 
-static const struct fs_parameter_description cgroup2_fs_parameters = {
-	.name		= "cgroup2",
-	.specs		= cgroup2_param_specs,
-};
-
 static int cgroup2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
 	struct cgroup_fs_context *ctx = cgroup_fc2context(fc);
 	struct fs_parse_result result;
 	int opt;
 
-	opt = fs_parse(fc, &cgroup2_fs_parameters, param, &result);
+	opt = fs_parse(fc, cgroup2_fs_parameters, param, &result);
 	if (opt < 0)
 		return opt;
 
@@ -2156,7 +2151,7 @@ static void cgroup_kill_sb(struct super_block *sb)
 struct file_system_type cgroup_fs_type = {
 	.name			= "cgroup",
 	.init_fs_context	= cgroup_init_fs_context,
-	.parameters		= &cgroup1_fs_parameters,
+	.parameters		= cgroup1_fs_parameters,
 	.kill_sb		= cgroup_kill_sb,
 	.fs_flags		= FS_USERNS_MOUNT,
 };
@@ -2164,7 +2159,7 @@ struct file_system_type cgroup_fs_type = {
 static struct file_system_type cgroup2_fs_type = {
 	.name			= "cgroup2",
 	.init_fs_context	= cgroup_init_fs_context,
-	.parameters		= &cgroup2_fs_parameters,
+	.parameters		= cgroup2_fs_parameters,
 	.kill_sb		= cgroup_kill_sb,
 	.fs_flags		= FS_USERNS_MOUNT,
 };
@@ -5932,11 +5927,14 @@ void cgroup_post_fork(struct task_struct *child)
 
 	spin_lock_irq(&css_set_lock);
 
-	WARN_ON_ONCE(!list_empty(&child->cg_list));
-	cset = task_css_set(current); /* current is @child's parent */
-	get_css_set(cset);
-	cset->nr_tasks++;
-	css_set_move_task(child, NULL, cset, false);
+	/* init tasks are special, only link regular threads */
+	if (likely(child->pid)) {
+		WARN_ON_ONCE(!list_empty(&child->cg_list));
+		cset = task_css_set(current); /* current is @child's parent */
+		get_css_set(cset);
+		cset->nr_tasks++;
+		css_set_move_task(child, NULL, cset, false);
+	}
 
 	/*
 	 * If the cgroup has to be frozen, the new task has too.  Let's set