From: David Howells <dhowells@redhat.com>
To: Matthew Garrett <matthewgarrett@google.com>
Cc: dhowells@redhat.com, jmorris@namei.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Alexei Starovoitov <alexei.starovoitov@gmail.com>,
Matthew Garrett <mjg59@google.com>,
Kees Cook <keescook@chromium.org>,
netdev@vger.kernel.org, Chun-Yi Lee <jlee@suse.com>,
Daniel Borkmann <daniel@iogearbox.net>
Subject: Re: [PATCH V40 23/29] bpf: Restrict bpf when kernel lockdown is in confidentiality mode
Date: Fri, 30 Aug 2019 17:32:58 +0100 [thread overview]
Message-ID: <3802.1567182778@warthog.procyon.org.uk> (raw)
In-Reply-To: <20190820001805.241928-24-matthewgarrett@google.com>
Matthew Garrett <matthewgarrett@google.com> wrote:
> From: David Howells <dhowells@redhat.com>
>
> bpf_read() and bpf_read_str() could potentially be abused to (eg) allow
> private keys in kernel memory to be leaked. Disable them if the kernel
> has been locked down in confidentiality mode.
>
> Suggested-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
> Signed-off-by: Matthew Garrett <mjg59@google.com>
> Reviewed-by: Kees Cook <keescook@chromium.org>
> cc: netdev@vger.kernel.org
> cc: Chun-Yi Lee <jlee@suse.com>
> cc: Alexei Starovoitov <alexei.starovoitov@gmail.com>
> Cc: Daniel Borkmann <daniel@iogearbox.net>
> Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: David Howells <dhowells@redhat.com>
prev parent reply other threads:[~2019-08-30 16:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190820001805.241928-1-matthewgarrett@google.com>
2019-08-20 0:17 ` [PATCH V40 23/29] bpf: Restrict bpf when kernel lockdown is in confidentiality mode Matthew Garrett
2019-08-30 16:32 ` David Howells [this message]
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