linux-kernel - [PATCH] [media] dib0700: fix possible NULL pointer dereference

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Date:	Sat, 26 Mar 2011 19:23:56 +0100
From:	Mariusz Kozlowski <mk@....zgora.pl>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>
Cc:	Patrick Boettcher <patrick.boettcher@...com.fr>,
	Olivier Grenie <olivier.grenie@...com.fr>,
	Wolfram Sang <w.sang@...gutronix.de>,
	David Härdeman <david@...deman.nu>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	Mariusz Kozlowski <mk@....zgora.pl>
Subject: [PATCH] [media] dib0700: fix possible NULL pointer dereference

Seems like 'adap->fe' test for NULL was meant to be before we dereference
that pointer.

Signed-off-by: Mariusz Kozlowski <mk@....zgora.pl>
---
 drivers/media/dvb/dvb-usb/dib0700_devices.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/media/dvb/dvb-usb/dib0700_devices.c b/drivers/media/dvb/dvb-usb/dib0700_devices.c
index 97af266..b48f1e0 100644
--- a/drivers/media/dvb/dvb-usb/dib0700_devices.c
+++ b/drivers/media/dvb/dvb-usb/dib0700_devices.c
@@ -2439,12 +2439,11 @@ static int tfe7090pvr_frontend0_attach(struct dvb_usb_adapter *adap)
 
 	dib0700_set_i2c_speed(adap->dev, 340);
 	adap->fe = dvb_attach(dib7000p_attach, &adap->dev->i2c_adap, 0x90, &tfe7090pvr_dib7000p_config[0]);
-
-	dib7090_slave_reset(adap->fe);
-
 	if (adap->fe == NULL)
 		return -ENODEV;
 
+	dib7090_slave_reset(adap->fe);
+
 	return 0;
 }
 
-- 
1.7.0.4

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