Messages in this thread Patch in this message | | | From | Thomas Gleixner <> | Subject | [GIT pull] perf/urgent for v5.16-rc3 | Date | Sun, 28 Nov 2021 17:35:18 +0100 (CET) |
| |
Linus,
please pull the latest perf/urgent branch from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf-urgent-2021-11-28
up to: 73743c3b0922: perf: Ignore sigtrap for tracepoints destined for other tasks
A single fix for perf to prevent that it sends 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.
Thanks,
tglx
------------------> Marco Elver (1): perf: Ignore sigtrap for tracepoints destined for other tasks
kernel/events/core.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/events/core.c b/kernel/events/core.c index 523106a506ee..30d94f68c5bd 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -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); }
| |