From: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
To: syzbot <syzbot+e8c1d30881266e47eb33@syzkaller.appspotmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>, bpf <bpf@vger.kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
David Miller <davem@davemloft.net>,
David Ahern <dsahern@gmail.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
johannes.berg@intel.com, Martin Lau <kafai@fb.com>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
linux-kernel <linux-kernel@vger.kernel.org>,
Network Development <netdev@vger.kernel.org>,
Peter Oskolkov <posk@google.com>,
songliubraving@fb.com,
Steffen Klassert <steffen.klassert@secunet.com>,
syzkaller-bugs@googlegroups.com, tglx@linutronix.de,
Yonghong Song <yhs@fb.com>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Subject: Re: KASAN: use-after-free Read in _decode_session6
Date: Thu, 7 Nov 2019 09:31:24 -0500 [thread overview]
Message-ID: <CA+FuTSfVgPM4DZcvaRjDinoyg7cA+Pj4oCO-13+7PsFGrhuC+w@mail.gmail.com> (raw)
In-Reply-To: <000000000000cd76fb0596c1d41c@google.com>
On Thu, Nov 7, 2019 at 8:42 AM syzbot
<syzbot+e8c1d30881266e47eb33@syzkaller.appspotmail.com> wrote:
>
> syzbot suspects this bug was fixed by commit:
>
> commit e7c87bd6cc4ec7b0ac1ed0a88a58f8206c577488
> Author: Willem de Bruijn <willemb@google.com>
> Date: Wed Jan 16 01:19:22 2019 +0000
>
> bpf: in __bpf_redirect_no_mac pull mac only if present
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1736f974600000
> start commit: b36fdc68 Merge tag 'gpio-v4.19-2' of git://git.kernel.org/..
> git tree: upstream
> kernel config: https://syzkaller.appspot.com/x/.config?x=4c7e83258d6e0156
> dashboard link: https://syzkaller.appspot.com/bug?extid=e8c1d30881266e47eb33
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14d42021400000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13d09f1e400000
>
> If the result looks correct, please mark the bug fixed by replying with:
>
> #syz fix: bpf: in __bpf_redirect_no_mac pull mac only if present
#syz fix: bpf: in __bpf_redirect_no_mac pull mac only if present
indeed manually reproduced at e7c87bd6cc4e~1, failed to reproduce at
e7c87bd6cc4e. Also seems plausible given the stack trace.
prev parent reply other threads:[~2019-11-07 14:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-06 16:41 KASAN: use-after-free Read in _decode_session6 syzbot
2019-11-07 13:42 ` syzbot
2019-11-07 14:31 ` Willem de Bruijn [this message]
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