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A single fix for perf to prevent that it sends SIGTRAP to another task from

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a trace point event as it's not possible to deliver a synchronous signal to
 a different task from there.
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Merge tag 'perf-urgent-2021-11-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf fix from Thomas Gleixner:
 "A single fix for perf to prevent it from sending SIGTRAP to another
  task from a trace point event as it's not possible to deliver a
  synchronous signal to a different task from there"

* tag 'perf-urgent-2021-11-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Ignore sigtrap for tracepoints destined for other tasks
This commit is contained in:
Linus Torvalds 2021-11-28 09:10:54 -08:00
commit 1ed1d3a3da
1 changed files with 3 additions and 0 deletions
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3
kernel/events/core.c
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@ -9759,6 +9759,9 @@ void perf_tp_event(u16 event_type, u64 count, void *record, int entry_size,
continue;
if (event->attr.config != entry->type)
continue;
/* Cannot deliver synchronous signal to other task. */
if (event->attr.sigtrap)
continue;
if (perf_tp_event_match(event, &data, regs))
perf_swevent_event(event, count, &data, regs);
}