linux-kernel - [PATCH 1/2] Input: cyttsp

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Message-ID: <1368192769-24067-1-git-send-email-fery@cypress.com>
Date:	Fri, 10 May 2013 16:32:48 +0300
From:	Ferruh Yigit <fery@...ress.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	<ttdrivers@...ress.com>, Ferruh Yigit <fery@...ress.com>,
	"Javier Martinez Canillas" <javier@...hile0.org>,
	<linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] Input: cyttsp - fix memcpy size param

memcpy param is wrong because of offset in bl_cmd, this may corrupt the
stack which may cause a crash.

Tested-by: Ferruh Yigit <fery@...ress.com> on TMA300-DVK
Signed-off-by: Ferruh Yigit <fery@...ress.com>
---
 drivers/input/touchscreen/cyttsp_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 8e60437..97ba891 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -133,7 +133,7 @@ static int cyttsp_exit_bl_mode(struct cyttsp *ts)
        memcpy(bl_cmd, bl_command, sizeof(bl_command));
        if (ts->pdata->bl_keys)
                memcpy(&bl_cmd[sizeof(bl_command) - CY_NUM_BL_KEYS],
-                       ts->pdata->bl_keys, sizeof(bl_command));
+                       ts->pdata->bl_keys, CY_NUM_BL_KEYS);

        error = ttsp_write_block_data(ts, CY_REG_BASE,
                                      sizeof(bl_cmd), bl_cmd);
--
1.7.9.5

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