From: Greg KH <gregkh@linuxfoundation.org>
To: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
linux-kernel@vger.kernel.org, antonio.gomez.iglesias@intel.com,
tony.luck@intel.com, dave.hansen@linux.intel.com
Subject: Re: [PATCH ebpf v2 2/2] bpf: Make unprivileged bpf depend on CONFIG_CPU_SPECTRE
Date: Thu, 28 Oct 2021 07:34:02 +0200 [thread overview]
Message-ID: <YXo2SpgjcsDzsD9O@kroah.com> (raw)
In-Reply-To: <882f5c31f48bac75ebaede2a0ec321ec67128229.1635383031.git.pawan.kumar.gupta@linux.intel.com>
On Wed, Oct 27, 2021 at 06:35:44PM -0700, Pawan Gupta wrote:
> Disabling unprivileged BPF would help prevent unprivileged users from
> creating the conditions required for potential speculative execution
> side-channel attacks on affected hardware. A deep dive on such attacks
> and mitigation is available here [1].
>
> If an architecture selects CONFIG_CPU_SPECTRE, disable unprivileged BPF
> by default. An admin can enable this at runtime, if necessary.
>
> Signed-off-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
>
> [1] https://ebpf.io/summit-2021-slides/eBPF_Summit_2021-Keynote-Daniel_Borkmann-BPF_and_Spectre.pdf
This should go above the signed-off-by line, in the changelog text, not
below it, otherwise our tools get confused when trying to apply it.
thanks,
greg k-h
next prev parent reply other threads:[~2021-10-28 5:34 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-28 1:32 [PATCH ebpf v2 0/2] Unprivileged BPF default Pawan Gupta
2021-10-28 1:35 ` [PATCH ebpf v2 2/2] bpf: Make unprivileged bpf depend on CONFIG_CPU_SPECTRE Pawan Gupta
2021-10-28 5:34 ` Greg KH [this message]
2021-10-28 19:38 ` Pawan Gupta
2021-10-28 13:57 ` Mark Rutland
2021-10-28 16:44 ` Greg KH
[not found] ` <232b692cd79e4f6e4c3ee7055b5f02792a28d2c4.1635383031.git.pawan.kumar.gupta@linux.intel.com>
[not found] ` <20211028134918.GB48435@lakrids.cambridge.arm.com>
2021-10-28 19:36 ` [PATCH v2 1/2] arch/Kconfig: Make CONFIG_CPU_SPECTRE available for all architectures Pawan Gupta
2021-10-29 9:22 ` Mark Rutland
2021-10-29 16:05 ` Daniel Borkmann
2021-10-29 19:15 ` Pawan Gupta
2021-10-29 10:08 ` Russell King (Oracle)
2021-10-29 22:51 ` Pawan Gupta
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