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Date: Fri, 25 Sep 2026 14:09:11 +0200
From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ian Rogers <irogers@google.com>
Cc: Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>, Jiri Olsa <jolsa@kernel.org>,
	Adrian Hunter <adrian.hunter@intel.com>,
	James Clark <james.clark@linaro.org>,
	linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1] perf machine: Add session back pointer to fix out of
 bounds read
Message-ID: <arZkZ-3QFuZHs75G@x2>
References: <20260918062620.2145220-1-irogers@google.com>
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In-Reply-To: <20260918062620.2145220-1-irogers@google.com>

On Thu, Sep 17, 2026 at 11:26:20PM -0700, Ian Rogers wrote:
> A NULL session is treated as live. The tests use synthetic pids that
> have no /proc entry, so the read fails there and the e_machine falls
> back to EM_HOST as before, rather than being decided by whatever the
> out of bounds read happened to return. perf inject registers its
> session with the aslr tool once the session exists, before any event is
> processed, so that tool keeps reporting file based threads as not live.
> 
> Fixes: 70351029b556 ("perf thread: Add support for reading the e_machine type for a thread")
> Assisted-by: Antigravity:gemini-3.1-pro

Thanks, applied to perf-tools-next, for v7.4.

- Arnaldo