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[media] dvb-usb: improve sanity check of adap->active_fe in dvb_usb_ctrl_feed

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The check for (adap->active_fe < 0) at the top of dvb_usb_ctrl_feed is a sanity
check to ensure that adap->active_fe is valid.  Improve that sanity check
by also checking for (adap->active_fe >= adap->num_frontends_initialized)

Signed-off-by: Michael Krufky <mkrufky@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Michael Krufky 2011-09-08 01:17:39 -03:00 committed by Mauro Carvalho Chehab
parent 4b5d01e9f6
commit 2d04c13a50
1 changed files with 2 additions and 1 deletions
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3
drivers/media/dvb/dvb-usb/dvb-usb-dvb.c
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@ -17,7 +17,8 @@ static int dvb_usb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
if (adap == NULL)
return -ENODEV;
if (adap->active_fe < 0) {
if ((adap->active_fe < 0) ||
(adap->active_fe >= adap->num_frontends_initialized)) {
return -EINVAL;
}