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From:   butt3rflyh4ck <butterflyhuangxx@gmail.com>
Date:   Thu, 6 Jan 2022 14:02:36 +0800
Message-ID: <CAFcO6XP6+=S1C_m28JF_aA5az=WiswS-J3d8X2dBsYyQ4nwzkg@mail.gmail.com>
Subject: Re: A slab-out-of-bounds Read bug in __htab_map_lookup_and_delete_batch
To:     Alexei Starovoitov <alexei.starovoitov@gmail.com>
Cc:     Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@kernel.org>,
        Networking <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>
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> >
> > Hi, the attachment is a reproducer. Enjoy it.
>
> Please do not top-post.
> Forwarding a syzbot reproducer with zero effort to analyze
> what's going on is kinda lame.

Hi, I am sorry for that.

> Maybe try harder and come up with a fix?
> Or at least try git bisect and based on a commit find and
> cc an author so it can be fixed (assuming issue still exists
> in bpf-next) ?
>

Thank you for your suggestions.
I spent a few days on git bisect and locked the bad commit, the commit
is d635a69dd4981cc51f90293f5f64268620ed1565.
The commit is a Merge tag 'net-next-5.11' and Contains multiple
commits, currently not locked to a single commit.


Regards,
 but3rflyh4ck.

--
Active Defense Lab of Venustech