netdev - Re: [PATCH bpf-next 2/5] bpf: allow for tailcalls in BPF subprograms

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Message-ID: <d2bdea0a-84be-9932-ddd0-c5003c88210b@iogearbox.net>
Date:   Thu, 16 Jul 2020 23:10:09 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Maciej Fijalkowski <maciej.fijalkowski@...el.com>, ast@...nel.org
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org, bjorn.topel@...el.com,
        magnus.karlsson@...el.com
Subject: Re: [PATCH bpf-next 2/5] bpf: allow for tailcalls in BPF subprograms

On 7/16/20 1:36 AM, Maciej Fijalkowski wrote:
> Relax verifier's restriction that was meant to forbid tailcall usage
> when subprog count was higher than 1.
> 
> Also, do not max out the stack depth of program that utilizes tailcalls.
> 
> Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>

[nit: this patch also needs reordering]