netdev - Re: net/rds: use-after-free in inet

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Message-ID: <20170228163833.GI31155@oracle.com>
Date:   Tue, 28 Feb 2017 11:38:33 -0500
From:   Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     santosh.shilimkar@...cle.com, David Miller <davem@...emloft.net>,
        netdev <netdev@...r.kernel.org>, linux-rdma@...r.kernel.org,
        rds-devel@....oracle.com, LKML <linux-kernel@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: net/rds: use-after-free in inet_create

On (02/28/17 17:32), Dmitry Vyukov wrote:
> Not reproducible so far.
> 
> rds is compiled into kernel (no modules):
> CONFIG_RDS=y
> CONFIG_RDS_TCP=y

I see. So if it never gets unloaded, the rds_connections "should"
be around forever.. let me inspect code and see if I spot some 
race-window.. 

> Also fuzzer actively creates and destroys namespaces.
> Yes, I don't see socket(0x15) in the log. Probably it was truncated.

I see. May be useful if we coudl get a crash dump to see what
other threads were going on (might give a hint about which threads
were racing). I'll try reproducing this at my end too.

--Sowmini