netdev - Re: [PATCH net] net/sched: sch_fq: fix integer overflow of "credit"

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Message-ID: <20230417193031.3ab4ee2a@kernel.org>
Date:   Mon, 17 Apr 2023 19:30:31 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Davide Caratti <dcaratti@...hat.com>
Cc:     Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Eric Dumazet <edumazet@...gle.com>,
        Christoph Paasch <cpaasch@...le.com>, netdev@...r.kernel.org
Subject: Re: [PATCH net] net/sched: sch_fq: fix integer overflow of "credit"

On Mon, 17 Apr 2023 13:02:40 +0200 Davide Caratti wrote:
> +		u32 initial_quantum = nla_get_u32(tb[TCA_FQ_INITIAL_QUANTUM]);
> +
> +		if (initial_quantum <= INT_MAX) {
> +			q->initial_quantum = initial_quantum;
> +		} else {
> +			NL_SET_ERR_MSG_MOD(extack, "invalid initial quantum");
> +			err = -EINVAL;
> +		}

Please set the right policy in fq_policy[] instead.