Merge "disp: msm: add check for buffer length before copy"

msm/dsi/dsi_ctrl.c

@@ -116,6 +116,9 @@ static ssize_t debugfs_state_info_read(struct file *file,
 			dsi_ctrl->clk_freq.pix_clk_rate,
 			dsi_ctrl->clk_freq.esc_clk_rate);
 
+	if (len > count)
+		len = count;
+
 	len = min_t(size_t, len, SZ_4K);
 	if (copy_to_user(buff, buf, len)) {
 		kfree(buf);
@@ -171,6 +174,8 @@ static ssize_t debugfs_reg_dump_read(struct file *file,
 		return rc;
 	}
 
+	if (len > count)
+		len = count;
 
 	len = min_t(size_t, len, SZ_4K);
 	if (copy_to_user(buff, buf, len)) {