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From: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
To: Xin Long <lucien.xin@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
	syzbot <syzbot+3dcd59a1f907245f891f@syzkaller.appspotmail.com>,
	ast@kernel.org, Daniel Borkmann <daniel@iogearbox.net>,
	LKML <linux-kernel@vger.kernel.org>,
	network dev <netdev@vger.kernel.org>,
	syzkaller-bugs <syzkaller-bugs@googlegroups.com>
Subject: Re: INFO: rcu detected stall in is_bpf_text_address
Date: Mon, 28 May 2018 15:22:31 -0300	[thread overview]
Message-ID: <20180528182230.GE3787@localhost.localdomain> (raw)
In-Reply-To: <CADvbK_e7LXc7minSmaPw6iZvjWo215wG-pPAS0gr58+-VxUO7Q@mail.gmail.com>

On Sun, May 20, 2018 at 04:26:03PM +0800, Xin Long wrote:
> On Sat, May 19, 2018 at 11:57 PM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> > SCTP experts, please take a look.
> >
> > On 05/19/2018 08:55 AM, syzbot wrote:
> >> Hello,
> >>
> >> syzbot found the following crash on:
> >>
> >> HEAD commit:    73fcb1a370c7 Merge branch 'akpm' (patches from Andrew)
> >> git tree:       upstream
> >> console output: https://syzkaller.appspot.com/x/log.txt?x=1462ec0f800000
> >> kernel config:  https://syzkaller.appspot.com/x/.config?x=f3b4e30da84ec1ed
> >> dashboard link: https://syzkaller.appspot.com/bug?extid=3dcd59a1f907245f891f
> >> compiler:       gcc (GCC) 8.0.1 20180413 (experimental)
> >> syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?x=1079cf8f800000

The reproducer has:
r0 = socket$inet6(0xa, 0x1, 0x8010000000000084)

Considering socket() prototype uses an int for the 3rd argument, how
should I interpret this 64b value?

0x84 is IPPROTO_SCTP, but don't know about the 0x8010000000000000 in
there.

  parent reply	other threads:[~2018-05-28 18:22 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-19 15:55 INFO: rcu detected stall in is_bpf_text_address syzbot
2018-05-19 15:57 ` Eric Dumazet
2018-05-20  1:45   ` Marcelo Ricardo Leitner
2018-05-20  8:26   ` Xin Long
2018-05-22  0:43     ` Marcelo Ricardo Leitner
2018-05-22  0:43       ` Marcelo Ricardo Leitner
2018-05-28 17:55     ` Marcelo Ricardo Leitner
2018-05-28 18:22     ` Marcelo Ricardo Leitner [this message]
2018-05-29 11:53       ` Andrey Konovalov

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