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Date: Thu, 30 Nov 2023 17:19:35 +0100
From: Eric Dumazet <>
To: John Fastabend <>
Cc: Daniel Borkmann <>,,,,,,,,,
Subject: Re: pull-request: bpf 2023-11-30

On Thu, Nov 30, 2023 at 5:04 PM Eric Dumazet <> wrote:

> Here is the repro:
> # See 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.

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