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Fix the x86 PMU multi-counter code returning invalid

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data in certain circumstances.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-urgent-2024-04-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf event fix from Ingo Molnar:
 "Fix the x86 PMU multi-counter code returning invalid data in certain
  circumstances"

* tag 'perf-urgent-2024-04-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/x86: Fix out of range data
This commit is contained in:
Linus Torvalds 2024-04-14 10:26:27 -07:00
commit a1505c47e7
1 changed files with 1 additions and 0 deletions
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arch/x86/events/core.c
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@ -1644,6 +1644,7 @@ static void x86_pmu_del(struct perf_event *event, int flags)
while (++i < cpuc->n_events) {
cpuc->event_list[i-1] = cpuc->event_list[i];
cpuc->event_constraint[i-1] = cpuc->event_constraint[i];
cpuc->assign[i-1] = cpuc->assign[i];
}
cpuc->event_constraint[i-1] = NULL;
--cpuc->n_events;