--- x/kernel/cgroup/legacy_freezer.c
+++ l/kernel/cgroup/legacy_freezer.c
@@ -22,6 +22,8 @@
 #include <linux/freezer.h>
 #include <linux/seq_file.h>
 #include <linux/mutex.h>
+#include <linux/cpu.h>
+#include <linux/jump_label.h>
 
 /*
  * A cgroup is freezing if any FREEZING flags are set.  FREEZING_SELF is
@@ -350,7 +352,7 @@ static void freezer_apply_state(struct f
 
 	if (freeze) {
 		if (!(freezer->state & CGROUP_FREEZING))
-			static_branch_inc(&freezer_active);
+			static_branch_inc_cpuslocked(&freezer_active);
 		freezer->state |= state;
 		freeze_cgroup(freezer);
 	} else {
@@ -361,7 +363,7 @@ static void freezer_apply_state(struct f
 		if (!(freezer->state & CGROUP_FREEZING)) {
 			freezer->state &= ~CGROUP_FROZEN;
 			if (was_freezing)
-				static_branch_dec(&freezer_active);
+				static_branch_dec_cpuslocked(&freezer_active);
 			unfreeze_cgroup(freezer);
 		}
 	}
@@ -423,7 +425,10 @@ static ssize_t freezer_write(struct kern
 	else
 		return -EINVAL;
 
+	cpus_read_lock();
 	freezer_change_state(css_freezer(of_css(of)), freeze);
+	cpus_read_unlock();
+
 	return nbytes;
 }