linux-kernel - [ 060/180] USB: ftdi_sio: fix problem when the manufacture is a NULL string

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Date:	Tue, 02 Oct 2012 00:52:57 +0200
From:	Willy Tarreau <w@....eu>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Willy Tarreau <w@....eu>
Subject: [ 060/180] USB: ftdi_sio: fix problem when the manufacture is a NULL string

2.6.32-longterm review patch.  If anyone has any objections, please let me know.

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

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

commit 656d2b3964a9d0f9864d472f8dfa2dd7dd42e6c0 upstream.

On some misconfigured ftdi_sio devices, if the manufacturer string is
NULL, the kernel will oops when the device is plugged in.  This patch
fixes the problem.

Reported-by: Wojciech M Zabolotny <W.Zabolotny@...a.pw.edu.pl>
Tested-by: Wojciech M Zabolotny <W.Zabolotny@...a.pw.edu.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Willy Tarreau <w@....eu>
---
 drivers/usb/serial/ftdi_sio.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 0a1ccaa..c374beb 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1784,7 +1784,8 @@ static int ftdi_8u2232c_probe(struct usb_serial *serial)
 
 	dbg("%s", __func__);
 
-	if (strcmp(udev->manufacturer, "CALAO Systems") == 0)
+	if ((udev->manufacturer) &&
+	    (strcmp(udev->manufacturer, "CALAO Systems") == 0))
 		return ftdi_jtag_probe(serial);
 
 	return 0;
-- 
1.7.2.1.45.g54fbc



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