netdev - Re: [PATCH] net/netfilter: use memset avoid infoleaks

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Message-ID: <20220301093842.GE12167@breakpoint.cc>
Date:   Tue, 1 Mar 2022 10:38:42 +0100
From:   Florian Westphal <fw@...len.de>
To:     cgel.zte@...il.com
Cc:     pablo@...filter.org, kadlec@...filter.org, fw@...len.de,
        davem@...emloft.net, kuba@...nel.org, ast@...nel.org,
        daniel@...earbox.net, andrii@...nel.org, kafai@...com,
        songliubraving@...com, yhs@...com, john.fastabend@...il.com,
        kpsingh@...nel.org, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH] net/netfilter: use memset avoid infoleaks

cgel.zte@...il.com <cgel.zte@...il.com> wrote:
> From: Minghao Chi (CGEL ZTE) <chi.minghao@....com.cn>
> 
> Use memset to initialize structs to preventing infoleaks
> in __bpf_mt_check_bytecode

What infoleak, care to elaborate?  I don't see where this gets
returned to userspace, its on-stack struct?