From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: 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>,
LKML <linux-kernel@vger.kernel.org>,
syzkaller <syzkaller@googlegroups.com>
Subject: Re: net/packet: use-after-free in packet_rcv_fanout
Date: Thu, 9 Feb 2017 07:12:20 -0800 [thread overview]
Message-ID: <20170209151220.GA4843@oracle.com> (raw)
In-Reply-To: <CACT4Y+a2tTARdXKtjtWny9hAPc9b8Q-v8ya3TOV-T+8s=PR2HQ@mail.gmail.com>
On (02/09/17 14:14), Dmitry Vyukov wrote:
>
> Call Trace:
:
> packet_rcv_has_room+0x25/0xb0 net/packet/af_packet.c:1308
> fanout_demux_rollover+0x3bb/0x6b0 net/packet/af_packet.c:1388
> packet_rcv_fanout+0x674/0x800 net/packet/af_packet.c:1490
> dev_queue_xmit_nit+0x73a/0xa90 net/core/dev.c:1898
:
> tcp_sendmsg_fastopen net/ipv4/tcp.c:1110 [inline]
:
looks like a race between a NIT socket (tcpdump, maybe?) that is closing,
and a standard tcp socket.. packet_release() takes the po->bind_lock
to remove the socket from the ptype_all NIT queue. but how does
that sync with the Tx path for other af_inet/af_inet6 sockets?
--Sowmini
next prev parent reply other threads:[~2017-02-09 15:12 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 [this message]
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
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170209151220.GA4843@oracle.com \
--to=sowmini.varadhan@oracle.com \
--cc=daniel@iogearbox.net \
--cc=davem@davemloft.net \
--cc=dvyukov@google.com \
--cc=edumazet@google.com \
--cc=jarno@ovn.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=philip.pettersson@gmail.com \
--cc=syzkaller@googlegroups.com \
--cc=weongyo.linux@gmail.com \
--cc=willemb@google.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).