diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index c9b52e9..d96d026 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5264,6 +5264,9 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
 	cpumask_var_t tracing_cpumask_new;
 	int err;
 
+	if (count == 0 || count > KMALLOC_MAX_SIZE)
+		return -EINVAL;
+
 	if (!zalloc_cpumask_var(&tracing_cpumask_new, GFP_KERNEL))
 		return -ENOMEM;