netdev - Re: [PATCH net] net/sched: act_pedit: fix memory leak when IDR allocation fails

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Date:   Wed, 14 Nov 2018 12:36:16 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Davide Caratti <dcaratti@...hat.com>
Cc:     Jiri Pirko <jiri@...lanox.com>, David Miller <davem@...emloft.net>,
        Vlad Buslov <vladbu@...lanox.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [PATCH net] net/sched: act_pedit: fix memory leak when IDR
 allocation fails

(Cc'ing Jamal)

On Wed, Nov 14, 2018 at 3:26 AM Davide Caratti <dcaratti@...hat.com> wrote:
>
> tcf_idr_check_alloc() can return a negative value, on allocation failures
> (-ENOMEM) or IDR exhaustion (-ENOSPC): don't leak keys_ex in these cases.

I think the comments above tcf_idr_check_alloc() need to improve too,
they imply tcf_idr_check_alloc() returns either 0 or 1.

Of course, this can be done with a separated patch.

>
> Fixes: 0190c1d452a9 ("net: sched: atomically check-allocate action")
> Signed-off-by: Davide Caratti <dcaratti@...hat.com>

I think your patch is correct.

Acked-by: Cong Wang <xiyou.wangcong@...il.com>