netdev - Re: [PATCH net] sch_netem: fix a divide by zero in tabledist()

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Message-ID: <20190920191516.073d88b6@cakuba.netronome.com>
Date:   Fri, 20 Sep 2019 19:15:16 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>,
        Eric Dumazet <eric.dumazet@...il.com>,
        syzbot <syzkaller@...glegroups.com>
Subject: Re: [PATCH net] sch_netem: fix a divide by zero in tabledist()

On Wed, 18 Sep 2019 08:05:39 -0700, Eric Dumazet wrote:
> syzbot managed to crash the kernel in tabledist() loading
> an empty distribution table.
> 
> 	t = dist->table[rnd % dist->size];
> 
> Simply return an error when such load is attempted.
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Reported-by: syzbot <syzkaller@...glegroups.com>

Applied, queued, thank you!