[PATCH 03/58] serial: mxs: fix buffer overflow

[Luis Henriques]

3.5.7.21 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wolfram Sang <wsa at the-dreams.de>

commit 4829e7650f8a40645e4e32b26a37fb833a5e75f0 upstream.

SMATCH correctly found an off-by-one error:

drivers/tty/serial/mxs-auart.c:889 auart_console_write() error: buffer overflow 'auart_port' 5 <= 5

Signed-off-by: Wolfram Sang <wsa at the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Cc: Kamal Mostafa <kamal at canonical.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 drivers/tty/serial/mxs-auart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 64565f8..5ceeed8 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -547,7 +547,7 @@ auart_console_write(struct console *co, const char *str, unsigned int count)
 	unsigned int old_ctrl0, old_ctrl2;
 	unsigned int to = 20000;
 
-	if (co->index >	MXS_AUART_PORTS || co->index < 0)
+	if (co->index >= MXS_AUART_PORTS || co->index < 0)
 		return;
 
 	s = auart_port[co->index];
-- 
1.8.3.2