pidfd: don't do_notify_pidfd() if !thread_group_empty()

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do_notify_pidfd() makes no sense until the whole thread group exits, change
do_notify_parent() to check thread_group_empty().

This avoids the unnecessary do_notify_pidfd() when tsk is not a leader, or
it exits before other threads, or it has a ptraced EXIT_ZOMBIE sub-thread.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20240127132407.GA29136@redhat.com
Reviewed-by: Tycho Andersen <tandersen@netflix.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Oleg Nesterov 2024-01-27 14:24:07 +01:00 • committed by Christian Brauner

parent cdefbf2324

commit 21e25205d7

1 changed files with 5 additions and 3 deletions

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kernel/signal.c

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