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can: kvaser_usb: check number of channels returned by HW 

It is needed to check the number of channels returned by the HW because it
cannot be greater than MAX_NET_DEVICES otherwise it will crash.

Signed-off-by: Olivier Sobrie <olivier@sobrie.be>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Olivier Sobrie 2014-02-11 11:01:23 +01:00 committed by Marc Kleine-Budde
parent 738b52bb98
commit 862474f8b4
1 changed files with 2 additions and 0 deletions
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2
drivers/net/can/usb/kvaser_usb.c
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@ -473,6 +473,8 @@ static int kvaser_usb_get_card_info(struct kvaser_usb *dev)
return err;
dev->nchannels = msg.u.cardinfo.nchannels;
if (dev->nchannels > MAX_NET_DEVICES)
return -EINVAL;
return 0;
}