linux-kernel - Re: [PATCH net V2 1/1] net/smc: take sock lock in smc

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Message-ID: <20180716151446.088ffc3b@epycfail>
Date:   Mon, 16 Jul 2018 15:14:46 +0200
From:   Stefano Brivio <sbrivio@...hat.com>
To:     Ursula Braun <ubraun@...ux.ibm.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-s390@...r.kernel.org, schwidefsky@...ibm.com,
        heiko.carstens@...ibm.com, raspl@...ux.ibm.com,
        linux-kernel@...r.kernel.org, eric.dumazet@...il.com,
        lifeasageek@...il.com
Subject: Re: [PATCH net V2 1/1] net/smc: take sock lock in smc_ioctl()

On Mon, 16 Jul 2018 13:56:52 +0200
Ursula Braun <ubraun@...ux.ibm.com> wrote:

> From: Ursula Braun <ursula.braun@...ux.ibm.com>
> 
> SMC ioctl processing requires the sock lock to work properly in
> all thinkable scenarios.
> Problem has been found with RaceFuzzer and fixes:
>    KASAN: null-ptr-deref Read in smc_ioctl
> 
> Reported-by: Byoungyoung Lee <lifeasageek@...il.com>
> Reported-by: syzbot+35b2c5aa76fd398b9fd4@...kaller.appspotmail.com
> Signed-off-by: Ursula Braun <ubraun@...ux.ibm.com>

Reviewed-by: Stefano Brivio <sbrivio@...hat.com>

-- 
Stefano