linux-kernel - Re: KASAN: use-after-free Read in sctp_packet

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Message-ID: <20180106170254.GH725@localhost.localdomain>
Date:   Sat, 6 Jan 2018 15:02:54 -0200
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     syzbot <syzbot+5adcca18fca253b4cb15@...kaller.appspotmail.com>
Cc:     davem@...emloft.net, linux-kernel@...r.kernel.org,
        linux-sctp@...r.kernel.org, netdev@...r.kernel.org,
        nhorman@...driver.com, syzkaller-bugs@...glegroups.com,
        vyasevich@...il.com
Subject: Re: KASAN: use-after-free Read in sctp_packet_transmit

On Fri, Jan 05, 2018 at 02:07:01PM -0800, syzbot wrote:
> Hello,
> 
> syzkaller hit the following crash on
> 8a4816cad00bf14642f0ed6043b32d29a05006ce
> git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/master
> compiler: gcc (GCC) 7.1.1 20170620
> .config is attached
> Raw console output is attached.
> Unfortunately, I don't have any reproducer for this bug yet.

How can we tell if there wasn't any list corruption messages before
the panic?

  Marcelo