linux-kernel - Re: [PATCH net v4] sctp: fix a potential OOB access in sctp_sched_set

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Message-ID: <ZFJlLaj6Qqa7Pc28@t14s.localdomain>
Date:   Wed, 3 May 2023 10:44:13 -0300
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Gavrilov Ilia <Ilia.Gavrilov@...otecs.ru>
Cc:     Simon Horman <simon.horman@...igine.com>,
        Neil Horman <nhorman@...driver.com>,
        Xin Long <lucien.xin@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "linux-sctp@...r.kernel.org" <linux-sctp@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "lvc-project@...uxtesting.org" <lvc-project@...uxtesting.org>
Subject: Re: [PATCH net v4] sctp: fix a potential OOB access in
 sctp_sched_set_sched()

On Wed, May 03, 2023 at 01:37:59PM +0000, Gavrilov Ilia wrote:
> The 'sched' index value must be checked before accessing an element
> of the 'sctp_sched_ops' array. Otherwise, it can lead to OOB access.
> 
> Note that it's harmless since the 'sched' parameter is checked before
> calling 'sctp_sched_set_sched'.
> 
> Found by InfoTeCS on behalf of Linux Verification Center
> (linuxtesting.org) with SVACE.
> 
> Reviewed-by: Xin Long <lucien.xin@...il.com>
> Reviewed-by: Simon Horman <simon.horman@...igine.com>
> Signed-off-by: Ilia.Gavrilov <Ilia.Gavrilov@...otecs.ru>

Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@...il.com>

Thx!