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| author | Budimir Markovic <markovicbudimir@gmail.com> | 2023-03-15 10:29:01 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-22 15:34:06 +0300 |
| commit | 529546ea2834ce58aa075837d57918740accf713 (patch) | |
| tree | dda6381c8fc75718562b1e3ad3d057bddfffbf90 /kernel/events | |
| parent | 36773a78b0de0223cb5863881db34f51f5ef9998 (diff) | |
| download | linux-529546ea2834ce58aa075837d57918740accf713.tar.xz | |
perf: Fix check before add_event_to_groups() in perf_group_detach()
commit fd0815f632c24878e325821943edccc7fde947a2 upstream.
Events should only be added to a groups rb tree if they have not been
removed from their context by list_del_event(). Since remove_on_exec
made it possible to call list_del_event() on individual events before
they are detached from their group, perf_group_detach() should check each
sibling's attach_state before calling add_event_to_groups() on it.
Fixes: 2e498d0a74e5 ("perf: Add support for event removal on exec")
Signed-off-by: Budimir Markovic <markovicbudimir@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/ZBFzvQV9tEqoHEtH@gentoo
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 3b9e86108f43..227ada724029 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2170,7 +2170,7 @@ static void perf_group_detach(struct perf_event *event) /* Inherit group flags from the previous leader */ sibling->group_caps = event->group_caps; - if (!RB_EMPTY_NODE(&event->group_node)) { + if (sibling->attach_state & PERF_ATTACH_CONTEXT) { add_event_to_groups(sibling, event->ctx); if (sibling->state == PERF_EVENT_STATE_ACTIVE) |