import PULS_20180308

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / input / touchscreen / mediatek / GT9XX / goodix_tool.c

diff --git a/drivers/input/touchscreen/mediatek/GT9XX/goodix_tool.c b/drivers/input/touchscreen/mediatek/GT9XX/goodix_tool.c
index db9406bd1386a56d24178ff546ff35b6811e28c2..2aa0ad58e7492cd98cb39305162b35809bc247d3 100644 (file)
--- a/drivers/input/touchscreen/mediatek/GT9XX/goodix_tool.c
+++ b/drivers/input/touchscreen/mediatek/GT9XX/goodix_tool.c
@@ -474,6 +474,13 @@ 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);
                memcpy(cmd_head.data, &buff[CMD_HEAD_LENGTH], cmd_head.data_len);
                GTP_DEBUG("update firmware, filename: %s", cmd_head.data);