diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 2f3e017d24d6..7700ccf25784 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -886,6 +886,9 @@ i915_wedged_read(struct file *filp,
 		       "wedged :  %d\n",
 		       atomic_read(&dev_priv->mm.wedged));
 
+	if (len > sizeof (buf))
+		len = sizeof (buf);
+
 	return simple_read_from_buffer(ubuf, max, ppos, buf, len);
 }