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Date:   Fri, 27 Aug 2021 16:38:20 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Cc:     stable@vger.kernel.org, bpf@vger.kernel.org,
        Salvatore Bonaccorso <carnil@debian.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Alexei Starovoitov <ast@kernel.org>,
        John Fastabend <john.fastabend@gmail.com>,
        Pavel Machek <pavel@denx.de>
Subject: Re: [PATCH 4.19 0/3] BPF fixes for CVE-2021-3444 and CVE-2021-3600
Message-ID: <YSj43Lpw9bilHuIn@kroah.com>
References: <20210827135533.146070-1-cascardo@canonical.com>
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On Fri, Aug 27, 2021 at 10:55:30AM -0300, Thadeu Lima de Souza Cascardo wrote:
> The upstream changes necessary to fix these CVEs rely on the presence of JMP32,
> which is not a small backport and brings its own potential set of necessary
> follow-ups.
> 
> Daniel Borkmann, John Fastabend and Alexei Starovoitov came up with a fix
> involving the use of the AX register.
> 
> This has been tested against the test_verifier in 4.19.y tree and some tests
> specific to the two referred CVEs.

THanks for these, now queued up!

greg k-h