linux

Files

Peter Zijlstra deee9dfb11 perf: Ensure swevent hrtimer is properly destroyed

[ Upstream commit ff5860f508 ]

With the change to hrtimer_try_to_cancel() in
perf_swevent_cancel_hrtimer() it appears possible for the hrtimer to
still be active by the time the event gets freed.

Make sure the event does a full hrtimer_cancel() on the free path by
installing a perf_event::destroy handler.

Fixes: eb3182ef04 ("perf/core: Fix system hang caused by cpu-clock usage")
Reported-by: CyberUnicorns <a101e_iotvul@163.com>
Tested-by: CyberUnicorns <a101e_iotvul@163.com>
Debugged-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-01-17 16:35:24 +01:00

callchain.c

perf: Simplify get_perf_callchain() user logic

2025-08-26 09:51:13 +02:00

core.c

perf: Ensure swevent hrtimer is properly destroyed

2026-01-17 16:35:24 +01:00

hw_breakpoint_test.c

perf/hw_breakpoint: remove MODULE_LICENSE in non-modules

2023-04-13 13:13:52 -07:00

hw_breakpoint.c

perf/hw_breakpoint: Return EOPNOTSUPP for unsupported breakpoint type