From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>,
Anoob Soman <anoob.soman@citrix.com>,
Dmitry Vyukov <dvyukov@google.com>,
David Miller <davem@davemloft.net>,
Willem de Bruijn <willemb@google.com>,
Eric Dumazet <edumazet@google.com>,
Daniel Borkmann <daniel@iogearbox.net>,
jarno@ovn.org, philip.pettersson@gmail.com,
weongyo.linux@gmail.com, netdev <netdev@vger.kernel.org>,
syzkaller <syzkaller@googlegroups.com>
Subject: Re: net/packet: use-after-free in packet_rcv_fanout
Date: Sun, 12 Feb 2017 20:42:39 -0500 [thread overview]
Message-ID: <20170213014239.GA21934@oracle.com> (raw)
In-Reply-To: <1486749763.7793.152.camel@edumazet-glaptop3.roam.corp.google.com>
On (02/10/17 10:02), Eric Dumazet wrote:
> At least, Anoob patch is making a step into the right direction ;)
> https://patchwork.ozlabs.org/patch/726532/
I've not been able to reproduce Dmitry's panic (though I did not try
very hard either) but there's a call to fanout_release from packet_release
before the synchronize_net() - I wonder if this could end up kfree'ing f
when there are threads in the middle of dev_queue_xmit_nit().
--Sowmini
next prev parent reply other threads:[~2017-02-13 1:43 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-09 13:14 net/packet: use-after-free in packet_rcv_fanout Dmitry Vyukov
2017-02-09 15:12 ` Sowmini Varadhan
2017-02-09 15:17 ` Eric Dumazet
2017-02-10 1:24 ` Cong Wang
2017-02-10 3:19 ` Eric Dumazet
2017-02-10 3:23 ` Eric Dumazet
2017-02-10 17:49 ` Cong Wang
2017-02-10 17:59 ` Eric Dumazet
2017-02-10 18:02 ` Cong Wang
2017-02-10 18:15 ` Eric Dumazet
2017-02-10 18:02 ` Eric Dumazet
2017-02-10 18:34 ` Cong Wang
2017-02-13 1:42 ` Sowmini Varadhan [this message]
2017-02-13 15:17 ` Dmitry Vyukov
2017-02-17 19:27 ` Cong Wang
2017-02-10 3:33 ` Sowmini Varadhan
2017-02-10 4:18 ` Eric Dumazet
2017-02-10 18:00 ` Cong Wang
2017-02-10 19:16 ` Sowmini Varadhan
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