[ 3.8.y.z extended stable ] Patch "serial: mxs: fix buffer overflow" has been added to staging queue

Kamal Mostafa kamal at canonical.com
Thu Aug 15 01:05:23 UTC 2013


This is a note to let you know that I have just added a patch titled

    serial: mxs: fix buffer overflow

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue

This patch is scheduled to be released in version 3.8.13.7.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From 99c3b32d3c9c6d86d0bd4d6e2f1a8d073f821c72 Mon Sep 17 00:00:00 2001
From: Wolfram Sang <wsa at the-dreams.de>
Date: Fri, 19 Apr 2013 21:12:17 +0200
Subject: serial: mxs: fix buffer overflow

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>
Signed-off-by: Kamal Mostafa <kamal 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 f0d17ee..6b00fa5 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -885,7 +885,7 @@ auart_console_write(struct console *co, const char *str, unsigned int count)
 	unsigned int old_ctrl0, old_ctrl2;
 	unsigned int to = 1000;

-	if (co->index >	MXS_AUART_PORTS || co->index < 0)
+	if (co->index >= MXS_AUART_PORTS || co->index < 0)
 		return;

 	s = auart_port[co->index];
--
1.8.1.2





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