import PULS_20180308

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / input / touchscreen / mediatek / GT9XXTB_hotknot / goodix_tool.c

diff --git a/drivers/input/touchscreen/mediatek/GT9XXTB_hotknot/goodix_tool.c b/drivers/input/touchscreen/mediatek/GT9XXTB_hotknot/goodix_tool.c
index 7ebef7d3f39022b714ebc97a63938453094085a9..aad1394649dd7acceacc5e7ae52453f5932025db 100644 (file)
--- a/drivers/input/touchscreen/mediatek/GT9XXTB_hotknot/goodix_tool.c
+++ b/drivers/input/touchscreen/mediatek/GT9XXTB_hotknot/goodix_tool.c
@@ -568,6 +568,13 @@ static s32 goodix_tool_write(struct file *filp, const char __user *buff, unsigne
     {
         show_len = 0;
         total_len = 0;
+               if ((cmd_head.data == NULL)
+                   || (cmd_head.data_len >= DATA_LENGTH)
+                   || (cmd_head.data_len >= (len - CMD_HEAD_LENGTH))) {
+                       GTP_ERROR("copy_from_user data out of range.");
+                       return -EINVAL;
+               }
+
         memset(cmd_head.data, 0, cmd_head.data_len + 1);
         ret = copy_from_user(cmd_head.data, &buff[CMD_HEAD_LENGTH], cmd_head.data_len);
         if (ret)