Patch "Input: ilitek_ts_i2c - add report id message validation" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    Input: ilitek_ts_i2c - add report id message validation

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     input-ilitek_ts_i2c-add-report-id-message-validation.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 2b963fb3ca0253c77a5bd07ccde1ee95672044b4
Author: Emanuele Ghidoli <emanuele.ghidoli@xxxxxxxxxxx>
Date:   Mon Aug 5 10:55:11 2024 +0200

    Input: ilitek_ts_i2c - add report id message validation
    
    [ Upstream commit 208989744a6f01bed86968473312d4e650e600b3 ]
    
    Ensure that the touchscreen response has correct "report id" byte
    before processing the touch data and discard other messages.
    
    Fixes: 42370681bd46 ("Input: Add support for ILITEK Lego Series")
    Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@xxxxxxxxxxx>
    Signed-off-by: Francesco Dolcini <francesco.dolcini@xxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20240805085511.43955-3-francesco@xxxxxxxxxx
    Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/input/touchscreen/ilitek_ts_i2c.c b/drivers/input/touchscreen/ilitek_ts_i2c.c
index f70af5a173b34..e719f5da68bf5 100644
--- a/drivers/input/touchscreen/ilitek_ts_i2c.c
+++ b/drivers/input/touchscreen/ilitek_ts_i2c.c
@@ -37,6 +37,8 @@
 #define ILITEK_TP_CMD_GET_MCU_VER			0x61
 #define ILITEK_TP_CMD_GET_IC_MODE			0xC0
 
+#define ILITEK_TP_I2C_REPORT_ID				0x48
+
 #define REPORT_COUNT_ADDRESS				61
 #define ILITEK_SUPPORT_MAX_POINT			40
 
@@ -163,6 +165,11 @@ static int ilitek_process_and_report_v6(struct ilitek_ts_data *ts)
 		return error;
 	}
 
+	if (buf[0] != ILITEK_TP_I2C_REPORT_ID) {
+		dev_err(dev, "get touch info failed. Wrong id: 0x%02X\n", buf[0]);
+		return -EINVAL;
+	}
+
 	report_max_point = buf[REPORT_COUNT_ADDRESS];
 	if (report_max_point > ts->max_tp) {
 		dev_err(dev, "FW report max point:%d > panel info. max:%d\n",




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