linux-kernel - Re: [PATCH] perf: Fix hang while freeing sigtrap event

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Message-ID: <20250305081907.xHiR7jy0@linutronix.de>
Date: Wed, 5 Mar 2025 09:19:07 +0100
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Frederic Weisbecker <frederic@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.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>,
	"Liang, Kan" <kan.liang@...ux.intel.com>,
	Oleg Nesterov <oleg@...hat.com>, Yi Lai <yi1.lai@...ux.intel.com>,
	syzbot+3c4321e10eea460eb606@...kaller.appspotmail.com
Subject: Re: [PATCH] perf: Fix hang while freeing sigtrap event

On 2025-03-04 14:54:46 [+0100], Frederic Weisbecker wrote:
> Perf can hang while freeing a sigtrap event if a related deferred
> signal hadn't managed to be sent before the file got closed:
…
> Signed-off-by: Frederic Weisbecker <frederic@...nel.org>

Reviewed-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

Both of the test cases pass… This looks way simpler than the initial
attempts, why didn't we go with this initially?

Sebastian