1 files changed, 2 insertions, 11 deletions

diff --git a/kernel/trace/trace_stack.c b/kernel/trace/trace_stack.c
index b0b53b8e4c25..77575b386d97 100644
--- a/kernel/trace/trace_stack.c
+++ b/kernel/trace/trace_stack.c
@@ -156,20 +156,11 @@ stack_max_size_write(struct file *filp, const char __user *ubuf,
 {
         long *ptr = filp->private_data;
         unsigned long val, flags;
-        char buf[64];
         int ret;
         int cpu;
 
-        if (count >= sizeof(buf))
-                return -EINVAL;
-
-        if (copy_from_user(&buf, ubuf, count))
-                return -EFAULT;
-
-        buf[count] = 0;
-
-        ret = strict_strtoul(buf, 10, &val);
-        if (ret < 0)
+        ret = kstrtoul_from_user(ubuf, count, 10, &val);
+        if (ret)
                 return ret;
 
         local_irq_save(flags);