netdev - Re: A slab-out-of-bounds Read bug in __htab_map_lookup_and_delete

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Message-ID: <CAADnVQ+HJnZOqGjXKXut51BUqi=+na4cj=PFaE35u9QwZDgeVQ@mail.gmail.com>
Date:   Wed, 29 Dec 2021 20:00:36 -0800
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     butt3rflyh4ck <butterflyhuangxx@...il.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: A slab-out-of-bounds Read bug in __htab_map_lookup_and_delete_batch

On Wed, Dec 29, 2021 at 7:24 PM butt3rflyh4ck
<butterflyhuangxx@...il.com> wrote:
>
> 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.
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) ?

> Regards,
>    butt3rflyh4ck.

Better stay humble.