netdev - Re: requesting stable backport of BPF security fix (commit dd066823db2ac4e22f721ec85190817b58059a54)

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Message-ID: <1e907c0b-f6c9-a1e2-502b-062e0cccc196@iogearbox.net>
Date:   Tue, 25 Sep 2018 15:27:44 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jann Horn <jannh@...gle.com>,
        Network Development <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>
Cc:     Alexei Starovoitov <ast@...nel.org>, security@...nel.org
Subject: Re: requesting stable backport of BPF security fix (commit
 dd066823db2ac4e22f721ec85190817b58059a54)

On 09/25/2018 02:46 PM, Jann Horn wrote:
> Hi!
> 
> Per the policy at Documentation/networking/netdev-FAQ.rst, I'm sending
> this to netdev@ and davem, rather than stable@; with a CC to security@
> because I believe that this is a security process issue.
> 
> Upstream commit dd066823db2ac4e22f721ec85190817b58059a54
> ("bpf/verifier: disallow pointer subtraction") fixes a security bug
> (kernel pointer leak to unprivileged userspace). The fix has been in
> Linus' tree since about a week ago, but the patch still doesn't appear
> in Greg's linux-4.18.y linux-stable-rc repo, in Greg's 4.18
> stable-queue, or in davem's stable queue at
> http://patchwork.ozlabs.org/bundle/davem/stable/?state=* .
> 
> Please queue it up for backporting.

Done & flushed out now, sorry for the delay.

Thanks,
Daniel