diff --git a/drivers/video/fbdev/msm/mdss_debug_xlog.c b/drivers/video/fbdev/msm/mdss_debug_xlog.c
index aeefc81657b0..10d747962a91 100644
--- a/drivers/video/fbdev/msm/mdss_debug_xlog.c
+++ b/drivers/video/fbdev/msm/mdss_debug_xlog.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2014-2017, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2014-2018, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -755,6 +755,11 @@ static ssize_t mdss_xlog_dump_read(struct file *file, char __user *buff,
 
 	if (__mdss_xlog_dump_calc_range()) {
 		len = mdss_xlog_dump_entry(xlog_buf, MDSS_XLOG_BUF_MAX);
+		if (len < 0 || len > count) {
+			pr_err("len is more than the size of user buffer\n");
+			return 0;
+		}
+
 		if (copy_to_user(buff, xlog_buf, len))
 			return -EFAULT;
 		*ppos += len;