linux-kernel - [PATCH 0/4] perf: Fix leaked events when sigtrap = 1

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Message-ID: <20240329235812.18917-1-frederic@kernel.org>
Date: Sat, 30 Mar 2024 00:58:08 +0100
From: Frederic Weisbecker <frederic@...nel.org>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Frederic Weisbecker <frederic@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Jiri Olsa <jolsa@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Adrian Hunter <adrian.hunter@...el.com>
Subject: [PATCH 0/4] perf: Fix leaked events when sigtrap = 1

While looking at task_work users I just noticed that perf doesn't flush
its own upon event exiting. This looks especially problematic with child
events. Please have a thourough look at the last patch, I may easily
have missed something within the maze.

Frederic Weisbecker (4):
  task_work: s/task_work_cancel()/task_work_cancel_func()/
  task_work: Introduce task_work_cancel() again
  perf: Fix event leak upon exit
  perf: Fix event leak upon exec and file release

 include/linux/perf_event.h |  1 +
 include/linux/task_work.h  |  3 ++-
 kernel/events/core.c       | 40 +++++++++++++++++++++++++++++++-------
 kernel/irq/manage.c        |  2 +-
 kernel/task_work.c         | 34 +++++++++++++++++++++++++++-----
 security/keys/keyctl.c     |  2 +-
 6 files changed, 67 insertions(+), 15 deletions(-)

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2.44.0