From: Max Filippov <jcmvbkbc@gmail.com>
To: Jin Yao <yao.jin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Oleg Nesterov <oleg@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
jolsa@kernel.org, LKML <Linux-kernel@vger.kernel.org>,
Andi Kleen <ak@linux.intel.com>,
kan.liang@intel.com, yao.jin@intel.com,
alexander.shishkin@linux.intel.com,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH v1 1/2] Missing instruction_pointer_set() instances
Date: Tue, 4 Aug 2020 14:31:39 -0700 [thread overview]
Message-ID: <CAMo8BfJBsU4xvUZe8HEJ=t8cYRh4RpQBqdustYRovjk4FUYsQg@mail.gmail.com> (raw)
In-Reply-To: <20200731025617.16243-1-yao.jin@linux.intel.com>
On Thu, Jul 30, 2020 at 7:59 PM Jin Yao <yao.jin@linux.intel.com> wrote:
>
> There is a potential security issue that perf kernel samples
> may be leaked even though kernel sampling is disabled. For fixing
> the potential leakage, the idea is to use instruction_pointer_set
> to set invalid ip address in leaked perf samples in some cases.
>
> But instruction_pointer_set is missing on some architectures.
> Define instruction_pointer_set for these architectures.
>
> Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
> ---
> arch/alpha/include/asm/ptrace.h | 6 ++++++
> arch/arc/include/asm/ptrace.h | 6 ++++++
> arch/nds32/include/asm/ptrace.h | 7 +++++++
> arch/xtensa/include/asm/ptrace.h | 6 ++++++
> 4 files changed, 25 insertions(+)
For xtensa:
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
--
Thanks.
-- Max
prev parent reply other threads:[~2020-08-04 21:31 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-31 2:56 [PATCH v1 1/2] Missing instruction_pointer_set() instances Jin Yao
2020-07-31 2:56 ` [PATCH v1 2/2] perf/core: Fake regs for leaked kernel samples Jin Yao
2020-08-04 11:49 ` peterz
2020-08-05 2:15 ` Jin, Yao
2020-08-05 12:44 ` peterz
2020-08-05 12:57 ` peterz
2020-08-06 2:26 ` Jin, Yao
2020-08-06 9:18 ` peterz
2020-08-06 9:24 ` peterz
2020-08-07 5:32 ` Jin, Yao
2020-08-06 11:00 ` peterz
2020-08-07 6:24 ` Jin, Yao
2020-08-07 9:02 ` peterz
2020-08-10 2:03 ` Jin, Yao
2020-08-07 5:23 ` Jin, Yao
2020-08-11 7:50 ` Jin, Yao
2020-08-11 7:59 ` Peter Zijlstra
2020-08-11 8:31 ` Jin, Yao
2020-08-11 8:45 ` Peter Zijlstra
2020-08-12 3:52 ` Jin, Yao
2020-08-12 7:25 ` Like Xu
2020-08-04 11:31 ` [PATCH v1 1/2] Missing instruction_pointer_set() instances peterz
2020-08-05 0:26 ` Jin, Yao
2020-08-04 21:31 ` Max Filippov [this message]
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