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@cypress.com> on TMA300-DVK
Signed-off-by: Ferruh Yigit <fery@cypress.com>
Acked-by: Javier Martinez Canillas <javier@dowhile0.org>
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 8e60437ac85b..97ba89128312 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);