netdev - Re: use-after-free in sctp_do

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Message-ID: <20151209150356.GA3886@mrl.redhat.com>
Date:	Wed, 9 Dec 2015 13:03:56 -0200
From:	Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:	Dmitry Vyukov <dvyukov@...gle.com>
Cc:	Vlad Yasevich <vyasevich@...il.com>,
	netdev <netdev@...r.kernel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	syzkaller <syzkaller@...glegroups.com>,
	linux-sctp@...r.kernel.org, Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>
Subject: Re: use-after-free in sctp_do_sm

On Wed, Dec 09, 2015 at 03:41:29PM +0100, Dmitry Vyukov wrote:
> On Tue, Dec 8, 2015 at 8:22 PM, Dmitry Vyukov <dvyukov@...gle.com> wrote:
> > On Tue, Dec 8, 2015 at 6:40 PM, Marcelo Ricardo Leitner
> > <marcelo.leitner@...il.com> wrote:
...
> >> The patches were combined already, but this last pick by Vlad is just
> >> not yet patched. It's not necessary for your testing and I didn't want
> >> to interrupt it in case you were already testing it.
> >>
> >> You can use my last patch here, from 2 emails ago, the one which
> >> contains this line:
> >> -       case SCTP_DISPOSITION_ABORT:
> >
> >
> > You are right. I missed that they are combined. Testing with it now.
> 
> 
> 
> 
> Use-after-free still happens.
> I am on commit aa53685549a2cfb5f175b0c4a20bc9aa1e5a1b85 (Dec 8) plus
> the following sctp-related changes:

Changes are fine.  Ugh. Ok, I'll try your new reproducer here.

  Marcelo

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