linux-kernel - Re: CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data

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Message-ID: <ZedOVc9h_VTBjHLD@tiehlicka>
Date: Tue, 5 Mar 2024 17:54:45 +0100
From: Michal Hocko <mhocko@...e.com>
To: cve@...nel.org, linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: CVE-2023-52521: bpf: Annotate bpf_long_memcpy with data_race

On Sat 02-03-24 22:53:05, Greg KH wrote:
> Description
> ===========
> 
> In the Linux kernel, the following vulnerability has been resolved:
> 
> bpf: Annotate bpf_long_memcpy with data_race
> 
> syzbot reported a data race splat between two processes trying to
> update the same BPF map value via syscall on different CPUs:
> 
>   BUG: KCSAN: data-race in bpf_percpu_array_update / bpf_percpu_array_update

I would like to dispute this CVE. It adds data_race annotation which
doesn't have any impact on the code generation.
-- 
Michal Hocko
SUSE Labs