From: Andi Kleen <ak@linux.intel.com>
To: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Mike Leach <mike.leach@linaro.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Leo Yan <leo.yan@linaro.org>, Jiri Olsa <jolsa@redhat.com>,
Namhyung Kim <namhyung@kernel.org>,
coresight@lists.linaro.org, Stephen Boyd <swboyd@chromium.org>,
Denis Nikitin <denik@chromium.org>,
Mattias Nissler <mnissler@chromium.org>,
Al Grant <al.grant@arm.com>,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Douglas Anderson <dianders@chromium.org>
Subject: Re: [PATCHv2 0/4] perf/core: Add support to exclude kernel mode PMU tracing
Date: Thu, 04 Mar 2021 11:59:05 -0800 [thread overview]
Message-ID: <871rcuvgfq.fsf@linux.intel.com> (raw)
In-Reply-To: <cover.1614624041.git.saiprakash.ranjan@codeaurora.org> (Sai Prakash Ranjan's message of "Tue, 2 Mar 2021 00:34:14 +0530")
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> writes:
>
> "Consider a system where disk contents are encrypted and the encryption
> key is set up by the user when mounting the file system. From that point
> on the encryption key resides in the kernel. It seems reasonable to
> expect that the disk encryption key be protected from exfiltration even
> if the system later suffers a root compromise (or even against insiders
> that have root access), at least as long as the attacker doesn't
> manage to compromise the kernel."
Normally disk encryption is in specialized work queues. It's total
overkill to restrict all of the kernel if you just want to restrict
those work queues.
I would suggest some more analysis where secrets are actually stored
and handled first.
-Andi
next prev parent reply other threads:[~2021-03-04 20:02 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 19:04 [PATCHv2 0/4] perf/core: Add support to exclude kernel mode PMU tracing Sai Prakash Ranjan
2021-03-01 19:04 ` [PATCHv2 1/4] " Sai Prakash Ranjan
2021-03-01 22:42 ` Doug Anderson
2021-03-01 19:04 ` [PATCHv2 2/4] perf evsel: Print warning for excluding kernel mode instruction tracing Sai Prakash Ranjan
2021-03-01 22:43 ` Doug Anderson
2021-03-02 6:45 ` Sai Prakash Ranjan
2021-03-01 19:04 ` [PATCHv2 3/4] coresight: etm4x: Add support to exclude kernel mode tracing Sai Prakash Ranjan
2021-03-01 22:43 ` Doug Anderson
2021-03-02 6:41 ` Sai Prakash Ranjan
2021-03-01 19:04 ` [PATCHv2 4/4] coresight: etm3x: " Sai Prakash Ranjan
2021-03-01 22:43 ` Doug Anderson
2021-03-02 6:46 ` Sai Prakash Ranjan
2021-03-04 19:59 ` Andi Kleen [this message]
2021-03-04 20:17 ` [PATCHv2 0/4] perf/core: Add support to exclude kernel mode PMU tracing Andi Kleen
2021-03-09 6:38 ` Sai Prakash Ranjan
2021-03-09 14:44 ` Andi Kleen
2021-03-10 15:17 ` Sai Prakash Ranjan
2021-06-10 13:28 ` Mattias Nissler
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