netdev - Re: [PATCH net v4 1/2] net: sched: tbf: fix calculation of max

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Date:	Mon, 02 Dec 2013 20:51:08 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Yang Yingliang <yangyingliang@...wei.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org, brouer@...hat.com,
	jpirko@...hat.com, jbrouer@...hat.com
Subject: Re: [PATCH net v4 1/2] net: sched: tbf: fix calculation of max_size

On Tue, 2013-12-03 at 11:26 +0800, Yang Yingliang wrote:

> +	if (qopt->rate.linklayer == TC_LINKLAYER_UNAWARE) {
> +		rtab = qdisc_get_rtab(&qopt->rate, tb[TCA_TBF_RTAB]);
> +		if (rtab) {
> +			qdisc_put_rtab(rtab);
> +			rtab = NULL;
> +		}
>  	}

Please make remove rtab use to make sure you dont leak a pointer.

	if (qopt->rate.linklayer == TC_LINKLAYER_UNAWARE)
	    qdisc_put_rtab(qdisc_get_rtab(&qopt->rate,
				          tb[TCA_TBF_RTAB]));


> +	if (qopt->peakrate.linklayer == TC_LINKLAYER_UNAWARE) {
> +		ptab = qdisc_get_rtab(&qopt->peakrate, tb[TCA_TBF_PTAB]);
> +		if (ptab) {
> +			qdisc_put_rtab(ptab);
> +			ptab = NULL;
> +		}

Same here for ptab


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