netdev - Re: [PATCH bpf-next v2] libbpf: fix crash in XDP socket part with new larger BPF_LOG_BUF

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Message-ID: <2354fbfd-8fdc-5e27-a868-306f10ade615@iogearbox.net>
Date:   Wed, 10 Apr 2019 09:58:39 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Magnus Karlsson <magnus.karlsson@...el.com>, bjorn.topel@...el.com,
        ast@...nel.org, netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH bpf-next v2] libbpf: fix crash in XDP socket part with new
 larger BPF_LOG_BUF_SIZE

On 04/10/2019 08:54 AM, Magnus Karlsson wrote:
> In commit da11b417583e ("libbpf: teach libbpf about log_level bit 2"),
> the BPF_LOG_BUF_SIZE was increased to 16M. The XDP socket part of
> libbpf allocated the log_buf on the stack, but for the new 16M buffer
> size this is not going to work. Change the code so it uses a 16K buffer
> instead.
> 
> Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>
> ---
> v2: simplified code as suggested by Daniel Borkmann

Applied, thanks.