Patchwork [056/133] serial: mxs: fix buffer overflow

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Submitter Kamal Mostafa
Date Aug. 16, 2013, 10:33 p.m.
Message ID <1376692475-28413-57-git-send-email-kamal@canonical.com>
Download mbox | patch
Permalink /patch/267885/
State New
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Kamal Mostafa - Aug. 16, 2013, 10:33 p.m.
3.8.13.7 -stable review patch.  If anyone has any objections, please let me know.

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

Patch

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];