perf: Fix check before add_event_to_groups() in perf_group_detach()

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commit fd0815f632 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: 2e498d0a74 ("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>

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Budimir Markovic 2023-03-15 00:29:01 -07:00 • committed by Greg Kroah-Hartman

parent b9391607fc

commit 2c6d1b3283

1 changed files with 1 additions and 1 deletions

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kernel/events/core.c

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