uprobes: change uprobe_register() to use uprobe_unregister() instead of __uprobe_unregister()

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If register_for_each_vma() fails uprobe_register() can safely drop
uprobe->register_rwsem and use uprobe_unregister(). There is no worry
about the races with another register/unregister, consumer_add() was
already called so this case doesn't differ from _unregister() right
after the successful _register().

Yes this means the extra up_write() + down_write(), but this is the
slow and unlikely case anyway.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/20240801132739.GA8809@redhat.com

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Oleg Nesterov 2024-08-01 15:27:39 +02:00 • committed by Peter Zijlstra

parent 3c83a9ad02

commit bb18c5de1c

1 changed files with 7 additions and 5 deletions

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kernel/events/uprobes.c

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