linux-kernel - Re: net/rds: use-after-free in inet

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Date:   Tue, 28 Feb 2017 12:33:28 -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 17:51), Dmitry Vyukov wrote:
> Searching other crashes for "net/rds" I found 2 more crashes that may
> be related. They suggest that the delayed works are not properly
> stopped when the socket is destroyed. That would explain how
> rds_connect_worker accesses freed net, right?

yes, I think we may want to explicitly cancel this workq.. this
in rds_conn_destroy().

I'm trying to build/sanity-test (if lucky, reproduce the bug)
as I send this out.. let me get back to you..

If I have a patch against net-next, would you be willing/able to 
try it out? given that this does not show up on demand, I'm not
sure how we can check that "the fix worked"..

--Sowmini