netdev - Re: pull-request: bpf 2023-11-30

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Message-ID: <CANn89iJUwnYGKW3mgCX8_9hFwwBeDXrbsk-XwOtsM2u0J7cyMw@mail.gmail.com>
Date: Thu, 30 Nov 2023 17:19:35 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: John Fastabend <john.fastabend@...il.com>
Cc: Daniel Borkmann <daniel@...earbox.net>, davem@...emloft.net, kuba@...nel.org, 
	pabeni@...hat.com, ast@...nel.org, andrii@...nel.org, martin.lau@...ux.dev, 
	netdev@...r.kernel.org, bpf@...r.kernel.org, jakub@...udflare.com
Subject: Re: pull-request: bpf 2023-11-30

On Thu, Nov 30, 2023 at 5:04 PM Eric Dumazet <edumazet@...gle.com> wrote:
>

> Here is the repro:
>
> # See https://goo.gl/kgGztJ for information about syzkaller reproducers.
> #{"procs":1,"slowdown":1,"sandbox":"","sandbox_arg":0,"close_fds":false}
> r0 = socket(0x1, 0x1, 0x0)
> r1 = bpf$MAP_CREATE(0x0, &(0x7f0000000200)=@...e={0xf, 0x4, 0x4, 0x12}, 0x48)
> bpf$MAP_UPDATE_ELEM(0x2, &(0x7f0000000140)={r1, &(0x7f0000000000),
> &(0x7f0000000100)=@...6=r0}, 0x20)
>
> I will release the syzbot report, and send the patch, thanks.

Actually I will release the syzbot report, and let you work on a fix,
perhaps as you pointed out we could be more restrictive.